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Code Using GraphQL

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Next-generation Node.js and TypeScript ORM with a built-in data loader, which can be used when building GraphQL backends. For more information, go to https://www.prisma.io/graphql
Last release 2 weeks ago37kApache License 2.0
Insomnia is an open-source, cross-platform API Client for GraphQL, REST, and gRPC. Insomnia combines an easy-to-use interface with advanced functionality like authentication helpers, code generation, and environment variables.
Last release 3 hours ago33kApache License 2.0
Hasura connects to your databases & microservices and instantly gives you a production-ready GraphQL API.
Last release 3 days ago31kApache License 2.0
Dgraph is a native GraphQL database with a graph backend. This means Dgraph is not an interface on top of an existing database like Postgres but is actually designed from the ground-up for GraphQL. It is optimized for speed and performance, depending on multiple computer science breakthroughs to get the best result. Dgraph Cloud is a fully managed GraphQL backend service that lets you iterate faster, without worrying about your infrastructure.
Last release 7 months ago20kOther

Install Steps if running locally on linux not on Dgraph Cloud:

docker pull dgraph/standalone
mkdir -p ~/dgraph
docker run -it -p 5080:5080 -p 6080:6080 -p 8080:8080 \
  -p 9080:9080 -p 8000:8000 -v ~/dgraph:/dgraph --name dgraph \

Set your GraphQL Schema:

touch schema.graphql
nano schema.graphql
type Product {
  id: ID!
  name: String! @id
  reviews: [Review] @hasInverse(field: about)
type Customer {
  username: String! @id
  reviews: [Review] @hasInverse(field: by)
type Review {
  id: ID!
  about: Product!
  by: Customer!
  comment: String @search(by: [fulltext])
  rating: Int @search
curl -X POST localhost:8080/admin/schema --data-binary '@schema.graphql'

Fire up your favorite GraphQL Client pointed at http://localhost:8080/graphql and run mutations and queries

mutation {
  addProduct(input: [{ name: "Dgraph" }, { name: "Dgraph Cloud" }]) {
    product {
  addCustomer(input: [{ username: "TonyStark" }]) {
    customer {
mutation {
    input: [
        by: { username: "TonyStark" }
        about: { name: "Dgraph" }
        comment: "Fantastic, easy to install, worked great. Best GraphQL server available"
        rating: 10
  ) {
    review {
      by {
      about {
query {
    filter: { comment: { alloftext: "server easy install" }, rating: { gt: 5 } }
  ) {
    by {
      reviews(order: { desc: rating }, first: 10) {
        about {
          reviews(order: { asc: rating, first: 5 }) {
            by {
    about {
The reference implementation of the GraphQL specification, designed for running GraphQL in a Node.js environment.
Last release 6 months ago20kMIT License

To run a GraphQL.js hello world script from the command line:

npm install graphql

Then run node hello.js with this code in hello.js:

var { graphql, buildSchema } = require("graphql")
var schema = buildSchema(`
  type Query {
    hello: String
var rootValue = { hello: () => "Hello world!" }
var source = "{ hello }"
graphql({ schema, source, rootValue }).then(response => {
Apollo Client
A powerful JavaScript GraphQL client, designed to work well with React, React Native, Angular 2, or just plain JavaScript.
Last release 4 days ago19kMIT License
Facebook's framework for building React applications that talk to a GraphQL backend.
Last release 2 months ago18kMIT License

Relay is a JavaScript framework for building data-driven React applications.

  • Declarative: Never again communicate with your data store using an imperative API. Simply declare your data requirements using GraphQL and let Relay figure out how and when to fetch your data.
  • Colocation: Queries live next to the views that rely on them, so you can easily reason about your app. Relay aggregates queries into efficient network requests to fetch only what you need.
  • Mutations: Relay lets you mutate data on the client and server using GraphQL mutations, and offers automatic data consistency, optimistic updates, and error handling.

See how to use Relay in your own project.

An interactive in-browser GraphQL IDE.
Last release 3 weeks ago16kMIT License
Apollo Server
A GraphQL server from Apollo that works with any Node.js HTTP framework
Last release 4 days ago14kMIT License

To run a hello world server with Apollo Server:

npm install @apollo/server graphql

Then run node server.js with this code in server.js:

import { ApolloServer } from "@apollo/server"
import { startStandaloneServer } from "@apollo/server/standalone"
const server = new ApolloServer({
const { url } = await startStandaloneServer(server)
console.log(`🚀 Server ready at ${url}`)

Apollo Server has a built in standalone HTTP server and middleware for Express, and has an framework integration API that supports all Node.js HTTP server frameworks and serverless environments via community integrations.

Apollo Server has a plugin API, integration with Apollo Studio, and performance and security features such as caching, automatic persisted queries, and CSRF prevention.

Apache APISIX is a dynamic, real-time, high-performance API gateway providing rich traffic management features such as load balancing, dynamic upstream, canary release, observability, etc. As a cloud-native API gateway, Apache APISIX already can support GraphQL syntax at the beginning of its design. Efficiently matching GraphQL statements carried in requests can filter out abnormal traffic to further ensure security. For more information, please visit How to Use GraphQL with API Gateway Apache APISIX
Last release 2 days ago14kApache License 2.0
builds a powerful, extensible and performant GraphQL API from a PostgreSQL schema in seconds; saving you weeks if not months of development time.
Last release 5 months ago12kOther
Generate types for GraphQL queries in TypeScript, Swift, golang, C#, C++, and more.
11kApache License 2.0
GraphQL Code Generator
GraphQL code generator with flexible support for custom plugins and templates like Typescript (frontend and backend), React Hooks, resolvers signatures and more.
Last release 6 hours ago11kMIT License
GraphQL Code Generator
GraphQL code generator with flexible support for custom plugins and templates like Typescript (frontend and backend), React Hooks, resolvers signatures and more.
Last release 6 hours ago11kMIT License
An implementation of GraphQL for Go / Golang.
Last release 11 months ago10kMIT License
Go generate based graphql server library.
Last release 2 weeks ago10kMIT License
AWS Amplify
A JavaScript library for application development using cloud services, which supports GraphQL backend and React components for working with GraphQL data.
Last release 1 day ago9kApache License 2.0
Tyk is a lightweight Open Source API Management Gateway that has built a Full API Life-Cycle Management around GraphQL with its own GraphQL engine that is written in Golang. Tyk supports schema stitching of multiple GraphQL and/or REST APIs through Universal Data Graph (UDG) as well as GraphQL Federation and GraphQL Subscription.
Last release 2 weeks ago9kOther
A highly customizable and versatile GraphQL client with which you add on features like normalized caching as you grow.
Last release 5 hours ago8kMIT License

urql is a GraphQL client that exposes a set of helpers for several frameworks. It’s built to be highly customisable and versatile so you can take it from getting started with your first GraphQL project all the way to building complex apps and experimenting with GraphQL clients.

  • Currently supports React, React Native, Preact, Svelte, and Vue, and is supported by GraphQL Code Generator.
  • Logical yet simple default behaviour and document caching, and normalized caching via @urql/exchange-graphcache
  • Fully customizable behaviour via “exchanges” (addon packages)
API Platform
API Platform is a fully-featured, flexible and extensible API framework built on top of Symfony.
Last release 1 day ago8kMIT License

The following class is enough to create both a Relay-compatible GraphQL server and a hypermedia API supporting modern REST formats (JSON-LD, JSONAPI…):

namespace AppEntity;
use ApiPlatformCoreAnnotationApiResource;
use DoctrineORMMapping as ORM;
 * Greet someone!
 * @ApiResource
 * @ORMEntity
class Greeting
     * @ORMId
     * @ORMColumn(type="guid")
    public $id;
     * @var string Your nice message
     * @ORMColumn
    public $hello;

Other API Platform features include data validation, authentication, authorization, deprecations, cache and GraphiQL integration.

GraphQL Yoga is a batteries-included cross-platform GraphQL over HTTP spec-compliant GraphQL Server using Envelop and GraphQL Tools.
Last release 2 weeks ago8kMIT License
  • Built around the Fetch API Request & Response objects
  • GraphQL over HTTP compliant
  • Extensible GraphQL Engine powered by Envelop
  • GraphQL Subscriptions over HTTP
  • Handle file uploads with GraphQL
  • Integrates with AWS Lambda, Cloudflare Workers, Deno, Express, Next.js, SvelteKit, and more.

To run a hello world server with graphql-yoga:

npm install graphql-yoga graphql

Then create a server using the createServer import:

import { createServer } from "http"
import { createSchema, createYoga } from "graphql-yoga"
    schema: createSchema({
      typeDefs: /* GraphQL */ `
        type Query {
          hello: String
      resolvers: {
        Query: {
          hello: () => "Hello Hello Hello",
).listen(4000, () => {
  console.info("GraphQL Yoga is listening on http://localhost:4000/graphql")

Depending on your deployment target, you may need to use an additional library. See the documentation for further details.

A Python library for building GraphQL APIs.
Last release 8 months ago8kMIT License

To run a Graphene hello world script:

pip install graphene

Then run python hello.py with this code in hello.py:

import graphene
class Query(graphene.ObjectType):
  hello = graphene.String(name=graphene.String(default_value="World"))
  def resolve_hello(self, info, name):
    return 'Hello ' + name
schema = graphene.Schema(query=Query)
result = schema.execute('{ hello }')
print(result.data['hello']) # "Hello World"

There are also nice bindings for Relay, Django, SQLAlchemy, and Google App Engine.

Webiny allows you to quickly build GraphQL APIs on top of AWS Lambda and DynamoDB with built-in scaffolds. Webiny also includes a ready-made headless GraphQL CMS for a no-code experience.
Last release 2 weeks ago7kOther
A Java library for building GraphQL APIs.
Last release 1 day ago6kMIT License

See the Getting Started tutorial on the GraphQL Java website.

Code that executes a hello world GraphQL query with graphql-java:

import graphql.ExecutionResult;
import graphql.GraphQL;
import graphql.schema.GraphQLSchema;
import graphql.schema.StaticDataFetcher;
import graphql.schema.idl.RuntimeWiring;
import graphql.schema.idl.SchemaGenerator;
import graphql.schema.idl.SchemaParser;
import graphql.schema.idl.TypeDefinitionRegistry;
import static graphql.schema.idl.RuntimeWiring.newRuntimeWiring;
public class HelloWorld {
    public static void main(String[] args) {
        String schema = "type Query{hello: String}";
        SchemaParser schemaParser = new SchemaParser();
        TypeDefinitionRegistry typeDefinitionRegistry = schemaParser.parse(schema);
        RuntimeWiring runtimeWiring = newRuntimeWiring()
                .type("Query", builder -> builder.dataFetcher("hello", new StaticDataFetcher("world")))
        SchemaGenerator schemaGenerator = new SchemaGenerator();
        GraphQLSchema graphQLSchema = schemaGenerator.makeExecutableSchema(typeDefinitionRegistry, runtimeWiring);
        GraphQL build = GraphQL.newGraphQL(graphQLSchema).build();
        ExecutionResult executionResult = build.execute("{hello}");
        // Prints: {hello=world}

See the graphql-java docs for further information.

A robust multi-protocol API client with features like API scripting, automation, collaborative workspaces, and comprehensive support for testing and developing GraphQL APIs.
GraphQL for .NET
Last release 1 month ago6kMIT License
using System;
using System.Threading.Tasks;
using GraphQL;
using GraphQL.Types;
using GraphQL.SystemTextJson; // First add PackageReference to GraphQL.SystemTextJson
public class Program
  public static async Task Main(string[] args)
    var schema = Schema.For(@"
      type Query {
        hello: String
    var json = await schema.ExecuteAsync(_ =>
      _.Query = "{ hello }";
      _.Root = new { Hello = "Hello World!" };
GraphQL Request
A simple and flexible JavaScript GraphQL client that works in all JavaScript environments (the browser, Node.js, and React Native) - basically a lightweight wrapper around fetch.
Last release 3 years ago6kMIT License
GraphQL server library for Rust
Last release 6 days ago6kOther
A Ruby library for building GraphQL APIs.
Last release 3 years ago5kMIT License

To run a hello world script with graphql-ruby:

gem install graphql

Then run ruby hello.rb with this code in hello.rb:

require 'graphql'
class QueryType < GraphQL::Schema::Object
  field :hello, String
  def hello
    "Hello world!"
class Schema < GraphQL::Schema
  query QueryType
puts Schema.execute('{ hello }').to_json

There are also nice bindings for Relay and Rails.

GraphQL Tools
A set of utils for faster development of GraphQL tools (Schema and documents loading, Schema merging and more).
Last release 4 days ago5kMIT License
An alternative to Postman that supports editing GraphQL queries directly and autoload your GraphQL schema.
Last release 3 weeks ago5kMIT License
Banana Cake Pop
A feature-rich GraphQL IDE by ChilliCream that let's you explore, manage, and test your GraphQL APIs. Check it out here.
Last release 20 hours ago5kMIT License
Strawberry Shake
Strawberry Shake is a open-source reactive GraphQL client for .NET
Last release 20 hours ago5kMIT License

Strawberry Shake removes the complexity of state management and lets you interact with local and remote data through GraphQL.

You can use Strawberry Shake to:

  • Generate a C# client from your GraphQL queries.
  • Interact with local and remote data through GraphQL.
  • Use reactive APIs to interact with your state.
    .Subscribe(result =>
Hot Chocolate
Hot Chocolate is an open-source GraphQL Server for .NET
Last release 20 hours ago5kMIT License

Hot Chocolate takes the complexity away from building a fully-fledged GraphQL server and lets you focus on delivering the next big thing.

using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
    .ConfigureServices(services =>
    .Configure(builder =>
            .UseEndpoints(e => e.MapGraphQL()))
public class Query
    public Hero GetHero() => new Hero();
public class Hero
    public string Name => "Luke Skywalker";
A PHP port of GraphQL reference implementation
Last release 2 weeks ago5kMIT License
GraphQL server with a focus on ease of use.
Last release 1 year ago5kBSD 2-Clause "Simplified" License
GraphQL implementation for Elixir.
Last release 2 years ago4kOther
Apollo iOS
A GraphQL client for iOS that returns results as query-specific Swift types, and integrates with Xcode to show your Swift source and GraphQL side by side, with inline validation errors.
Last release 4 days ago4kMIT License
Strawberry is a Python library for implementing code first GraphQL servers using modern Python features like type hints.
Last release 4 hours ago4kMIT License

Here’s an example of a Strawberry hello world, first install the library:

pip install strawberry-graphql

Create an app.py file with this content:

import strawberry
class Query:
    def hello(self, name: str = "World") -> str:
        return f"Hello {name}"
schema = strawberry.Schema(query=Query)

Then run strawberry server app and you will have a basic schema server running on http://localhost:8000.

Strawberry also has views for ASGI, Flask and Django and provides utilities like dataloaders and tracing.

Apollo Kotlin
A strongly-typed, caching GraphQL client for the JVM, Android, and Kotlin multiplatform.
Last release 6 days ago4kMIT License

Apollo Kotlin (formerly known as Apollo Android) is a GraphQL client with support for Android, Java8+, iOS and Kotlin multiplatform in general. It features:

  • Java and Kotlin Multiplatform code generation
  • Queries, Mutations and Subscriptions
  • Reflection-free parsing
  • Normalized cache
  • Custom scalar types
  • HTTP cache
  • Auto Persisted Queries
  • Query batching
  • File uploads
  • Espresso IdlingResource
  • Fake models for tests
  • AppSync and graphql-ws websockets
  • GraphQL AST parser
A free, open-source WordPress plugin that provides an extendable GraphQL schema and API for any WordPress site
Last release 1 week ago4kGNU General Public License v3.0
A GraphQL tool to ease the creation of permission layer.
Last release 1 year ago4kMIT License

GraphQL Shield helps you create a permission layer for your application. Using an intuitive rule-API, you’ll gain the power of the shield engine on every request and reduce the load time of every request with smart caching. This way you can make sure your application will remain quick, and no internal data will be exposed.

import { rule, shield, and, or, not } from "graphql-shield"
// Rules
const isAuthenticated = rule({ cache: "contextual" })(async (
) => {
  return ctx.user !== null
const isAdmin = rule({ cache: "contextual" })(async (
) => {
  return ctx.user.role === "admin"
const isEditor = rule({ cache: "contextual" })(async (
) => {
  return ctx.user.role === "editor"
// Permissions
const permissions = shield({
  Query: {
    frontPage: not(isAuthenticated),
    fruits: and(isAuthenticated, or(isAdmin, isEditor)),
    customers: and(isAuthenticated, isAdmin),
  Mutation: {
    addFruitToBasket: isAuthenticated,
  Fruit: isAuthenticated,
  Customer: isAdmin,
// Server
const server = new GraphQLServer({
  middlewares: [permissions],
  context: req => ({
    user: getUser(req),
A GraphQL server for Laravel
Last release 2 weeks ago3kMIT License
curl for GraphQL with autocomplete, subscriptions and GraphiQL. Also a dead-simple universal javascript GraphQL client.
3kApache License 2.0
A GraphQL client implementation in Flutter.
Last release 2 months ago3kMIT License
Async-graphql is a high-performance server-side library that supports all GraphQL specifications.
Last release 1 year ago3kApache License 2.0
 use async_graphql::*;
 struct Query;
 impl Query {
    /// Returns the sum of a and b
    async fn add(&self, a: i32, b: i32) -> i32 {
        a + b
GraphQL Mesh
GraphQL Mesh allows you to use GraphQL query language to access data in remote APIs that don't run GraphQL (and also ones that do run GraphQL). It can be used as a gateway to other services, or run as a local GraphQL schema that aggregates data from remote APIs.
Last release 4 hours ago3kMIT License
Domain Graph Service (DGS) Framework
The DGS Framework (Domain Graph Service) is a GraphQL server framework for Spring Boot, developed by Netflix.
Last release 1 week ago3kApache License 2.0

The DGS Framework (Domain Graph Service) is a GraphQL server framework for Spring Boot, developed by Netflix.

Features include:

  • Annotation based Spring Boot programming model
  • Test framework for writing query tests as unit tests
  • Gradle Code Generation plugin to create types from schema
  • Easy integration with GraphQL Federation
  • Integration with Spring Security
  • GraphQL subscriptions (WebSockets and SSE)
  • File uploads
  • Error handling
  • Many extension points

See DGS Framework Getting Started for how to get started.

An instant GraphQL to SQL compiler. Use as a standalone service or a Go library. Formerly super-graph.
Last release 3 months ago3kApache License 2.0
Mercurius is a flexible and extendible GraphQL adapter for Fastify, a blazing-fast web framework with the least overhead and a powerful plugin architecture.
Last release 1 week ago2kMIT License

To run an hello world script with mercurius:

npm install fastify mercurius

Then run node app.js with this code in app.js:

const Fastify = require("fastify")
const mercurius = require("mercurius")
const schema = `
  type Query {
    hello(name: String): String!
const resolvers = {
  Query: {
    hello: async (_, { name }) => `hello ${name || "world"}`,
const app = Fastify()
app.register(mercurius, {
// Call IT!
// curl 'http://localhost:3000/graphql' \
//  -H 'content-type: application/json' \
//  --data-raw '{"query":"{ hello(name:\"Marcurius\") }" }'
A plugin based schema builder for creating code-first GraphQL schemas in typescript
Last release 3 weeks ago2kISC License

GiraphQL makes writing type-safe schemas simple, and works without a code generator, build process, or extensive manual type definitions.

import { ApolloServer } from "apollo-server"
import SchemaBuilder from "@giraphql/core"
const builder = new SchemaBuilder({})
  fields: t => ({
    hello: t.string({
      args: {
        name: t.arg.string({}),
      resolve: (parent, { name }) => `hello, ${name || "World"}`,
new ApolloServer({
  schema: builder.toSchema({}),
WunderGraph is an open-source GraphQL Gateway that is able to compose Apollo Federation, GraphQL, REST APIs, Databases, Kafka and more.
Last release 2 weeks ago2kApache License 2.0

WunderGraph composes all your APIs into a single unified GraphQL API and allows you to expose your Graph as a secure and type-safe JSON-RPC API.

To get started with WunderGraph, you can use create-wundergraph-app to bootstrap a new project:

npx create-wundergraph-app my-project -E nextjs-swr

On the client side, WunderGraph’s JSON-RPC API integrates very well with frameworks like Next.js, SWR and React Query, while one the backend, we’re able to leverage the power of “Server-Side-Only GraphQL”. Handle authentication, authorization, validation, joins and more right in the Query Layer.

mutation (
  $name: String! @fromClaim(name: NAME)
  $email: String! @fromClaim(name: EMAIL)
  $message: String! @jsonSchema(pattern: "^[a-zA-Z 0-9]+$")
) {
    data: {
      message: $message
      user: {
        connectOrCreate: {
          where: { email: $email }
          create: { email: $email, name: $name }
  ) {
    user {

The Query above requires the user to be authenticated, injects the user’s name and email from the JWT token and validates the message against a JSON Schema.

Here’s another example showcasing how we can use Server-Side GraphQL with WunderGraph’s unique join capabilities, composing data from two different APIs into a single GraphQL response.

query (
  $continent: String!
  # the @internal directive removes the $capital variable from the public API
  # this means, the user can't set it manually
  # this variable is our JOIN key
  $capital: String! @internal
) {
  countries_countries(filter: { continent: { eq: $continent } }) {
    # using the @export directive, we can export the value of the field `capital` into the JOIN key ($capital)
    capital @export(as: "capital")
    # the _join field returns the type Query!
    # it exists on every object type so you can everywhere in your Query documents
    _join {
      # once we're inside the _join field, we can use the $capital variable to join the weather API
      weather_getCityByName(name: $capital) {
        weather {
          temperature {
          summary {

The full example can be found on GitHub.

Ariadne is a Python library for implementing GraphQL servers using schema-first approach. It supports both synchronous and asynchronous query execution, ships with batteries included for common GraphQL server problems like query cost validation or performance tracing and has simple API that is easy to extend or replace.
Last release 1 week ago2kBSD 3-Clause "New" or "Revised" License

Ariadne can be installed with pip:

$ pip install ariadne

Minimal “Hello world” server example:

from ariadne import ObjectType, gql, make_executable_schema
from ariadne.asgi import GraphQL
type_defs = gql(
    type Query {
        hello: String!
query_type = ObjectType("Query")
def resolve_hello(*_):
    return "Hello world!"
schema = make_executable_schema(type_defs, query_type)
app = GraphQL(schema, debug=True)

Run the server with uvicorn:

$ pip install uvicorn
$ uvicorn example:app
A modern API testing tool for web applications built with Open API and GraphQL specifications.
Last release 5 days ago2kMIT License

Run Schemathesis via Docker against your GraphQL endpoint:

docker run schemathesis/schemathesis \
  run https://your.app.com/graphql

Schemathesis will generate queries matching your GraphQL schema and catch server crashes automatically. Generated queries have arbitrary depth and may contain any subset of GraphQL types defined in the input schema. They expose edge cases in your code that are unlikely to be found otherwise.

Note that you can write your app in any programming language; the tool will communicate with it over HTTP.

For example, running the command above against https://bahnql.herokuapp.com/graphql uncovers that running the { search(searchTerm: "") { stations { name } } } query leads to a server error:

  "errors": [
      "message": "Cannot read property 'city' of undefined",
      "locations": [
          "line": 1,
          "column": 28
      "path": ["search", "stations"]
  "data": null
A command line tool for common GraphQL development workflows.
Last release 3 years ago2kMIT License
A Scala GraphQL library that supports Relay.
Last release 1 month ago2kApache License 2.0

An example of a hello world GraphQL schema and query with sangria:

import sangria.schema._
import sangria.execution._
import sangria.macros._
val QueryType = ObjectType("Query", fields[Unit, Unit](
  Field("hello", StringType, resolve = _  "Hello world!")
val schema = Schema(QueryType)
val query = graphql"{ hello }"
Executor.execute(schema, query) map println
Minimal React hooks-first GraphQL client with a tiny bundle, SSR support and caching
Last release 2 months ago2kOther
  • 🥇 First-class hooks API
  • ⚖️ Tiny bundle: only 7.6kB (2.8 gzipped)
  • 📄 Full SSR support: see graphql-hooks-ssr
  • 🔌 Plugin Caching: see graphql-hooks-memcache
  • 🔥 No more render props hell
  • ⏳ Handle loading and error states with ease


npm install graphql-hooks

First you’ll need to create a client and wrap your app with the provider:

import { GraphQLClient, ClientContext } from "graphql-hooks"
const client = new GraphQLClient({
  url: "/graphql",
function App() {
  return (
    <ClientContext.Provider value={client}>
      {/* children */}

Now in your child components you can make use of useQuery:

import { useQuery } from "graphql-hooks"
const HOMEPAGE_QUERY = `query HomePage($limit: Int) {
  users(limit: $limit) {
function MyComponent() {
  const { loading, error, data } = useQuery(HOMEPAGE_QUERY, {
    variables: {
      limit: 10,
  if (loading) return "Loading..."
  if (error) return "Something Bad Happened"
  return (
      {data.users.map(({ id, name }) => (
        <li key={id}>{name}</li>
GraphQL Scalars
A library of custom GraphQL scalar types for creating precise, type-safe GraphQL schemas.
Last release 1 week ago2kMIT License
A full implementation of the GraphQL specification that aims to maintain external compliance with the specification.
A set of libraries for running GraphQL client and server in Kotlin.
Last release 2 months ago2kApache License 2.0

GraphQL Kotlin provides a set of lightweight type-safe GraphQL HTTP clients. The library provides Ktor HTTP client and Spring WebClient based reference implementations as well as allows for custom implementations using other engines. Jackson and kotlinx-serialization type-safe data models are generated at build time by the provided Gradle and Maven plugins.

To generate Jackson models that will be used with GraphQL Kotlin Spring WebClient, add following to your Gradle build file:

// build.gradle.kts
import com.expediagroup.graphql.plugin.gradle.graphql
plugins {
    id("com.expediagroup.graphql") version $latestGraphQLKotlinVersion
dependencies {
graphql {
    client {
        // target GraphQL endpoint
        endpoint = "http://localhost:8080/graphql"
        // package for generated client code
        packageName = "com.example.generated"

By default, GraphQL Kotlin plugins will look for query files under src/main/resources. Given HelloWorldQuery.graphql sample query:

query HelloWorldQuery {

Plugin will generate classes that are simple POJOs implementing GraphQLClientRequest interface and represent a GraphQL request.

package com.example.generated
import com.expediagroup.graphql.client.types.GraphQLClientRequest
import kotlin.String
import kotlin.reflect.KClass
const val HELLO_WORLD_QUERY: String = "query HelloWorldQuery {\n    helloWorld\n}"
class HelloWorldQuery: GraphQLClientRequest<HelloWorldQuery.Result> {
    override val query: String = HELLO_WORLD_QUERY
    override val operationName: String = "HelloWorldQuery"
    override fun responseType(): KClass<HelloWorldQuery.Result> = HelloWorldQuery.Result::class
    data class Result(
        val helloWorld: String

We can then execute our queries using target client.

package com.example.client
import com.expediagroup.graphql.client.spring.GraphQLWebClient
import com.expediagroup.graphql.generated.HelloWorldQuery
import kotlinx.coroutines.runBlocking
fun main() {
    val client = GraphQLWebClient(url = "http://localhost:8080/graphql")
    runBlocking {
        val helloWorldQuery = HelloWorldQuery()
        val result = client.execute(helloWorldQuery)
        println("hello world query result: ${result.data?.helloWorld}")

See graphql-kotlin client docs for additional details.

A set of libraries for running GraphQL client and server in Kotlin.
Last release 2 months ago2kApache License 2.0

GraphQL Kotlin follows a code first approach for generating your GraphQL schemas. Given the similarities between Kotlin and GraphQL, such as the ability to define nullable/non-nullable types, a schema can be generated from Kotlin code without any separate schema specification. To create a reactive GraphQL web server add following dependency to your Gradle build file:

// build.gradle.kts
implementation("com.expediagroup", "graphql-kotlin-spring-server", latestVersion)

We also need to provide a list of supported packages that can be scanned for exposing your schema objects through reflections. Add following configuration to your application.yml file:

    - "com.your.package"

With the above configuration we can now create our schema. In order to expose your queries, mutations and/or subscriptions in the GraphQL schema you simply need to implement corresponding marker interface and they will be automatically picked up by graphql-kotlin-spring-server auto-configuration library.

class HelloWorldQuery : Query {
  fun helloWorld() = "Hello World!!!"

This will result in a reactive GraphQL web application with following schema:

type Query {
  helloWorld: String!

See graphql-kotlin docs for additial details.

Coherent, zero-dependency, lazy, simple, GraphQL over WebSocket Protocol compliant server and client.
Last release 1 month ago2kMIT License
Coherent, zero-dependency, lazy, simple, GraphQL over WebSocket Protocol compliant server and client.
Last release 1 month ago2kMIT License
GraphQL Inspector
Compare schemas, validate documents, find breaking changes, find similar types, schema coverage, and more.
Last release 3 months ago2kMIT License
A GraphQL implementation with easy schema building, live queries, and batching.
2kMIT License
A simple JavaScript GraphQL client that works in all JavaScript environments (the browser, Node.js, and React Native).
2kMIT License
GraphQL Spring Boot
GraphQL Spring Boot from GraphQL Java Kickstart
Last release 3 months ago2kMIT License

The GraphQL Spring Boot turns any Spring Boot application into a GraphQL Server

Started includes features such as:

See GraphQL Java Kickstart Getting Started for how to get started.

Spring for GraphQL
Spring for GraphQL provides support for Spring applications built on GraphQL Java.
Last release 1 month ago1kApache License 2.0

Spring for GraphQL provides support for Spring applications built on GraphQL Java. See the official Spring guide for how to build a GraphQL service in 15 minutes.

  • It is a joint collaboration between the GraphQL Java team and Spring engineering.
  • Our shared philosophy is to provide as little opinion as we can while focusing on comprehensive support for a wide range of use cases.
  • It aims to be the foundation for all Spring, GraphQL applications.


  • Server handling of GraphQL requests over HTTP, WebSocket, and RSocket.
  • An annotation-based programming model where @Controller components use annotations to declare handler methods with flexible method signatures to fetch the data for specific GraphQL fields. For example:
public class GreetingController {
    public String hello() {
        return "Hello, world!";
  • Client support for executing GraphQL requests over HTTP, WebSocket, and RSocket.
  • Dedicated support for testing GraphQL requests over HTTP, WebSocket, and RSocket, as well as for testing directly against a server.

To get started, check the Spring GraphQL starter on https://start.spring.io and the samples in this repository.

A GraphQL client in Python.
Last release 1 month ago1kMIT License
GraphQL Modules
GraphQL Modules lets you separate your backend implementation to small, reusable, easy-to-implement and easy-to-test pieces.
Last release 4 months ago1kMIT License
Open source Kubernetes-native tool for API Mocking and Testing
1kApache License 2.0

Microcks is a platform for turning your API and microservices assets - GraphQL schemas, OpenAPI specs, AsyncAPI specs, gRPC protobuf, Postman collections, SoapUI projects_ - into live simulations in seconds.

It also reuses these assets for running compliance and non-regression tests against your API implementation. We provide integrations with Jenkins, GitHub Actions, Tekton and many others through a simple CLI.

GraphQL Config
One configuration for all your GraphQL tools (supported by most tools, editors & IDEs).
Last release 5 months ago1kMIT License
GraphQL Middleware
Split up your GraphQL resolvers in middleware functions.
Last release 8 months ago1kMIT License

GraphQL Middleware is a schema wrapper which allows you to manage additional functionality across multiple resolvers efficiently.


💡 Easy to use: An intuitive, yet familiar API that you will pick up in a second. 💪 Powerful: Allows complete control over your resolvers (Before, After). 🌈 Compatible: Works with any GraphQL Schema.


const { ApolloServer } = require("apollo-server")
const { makeExecutableSchema } = require("@graphql-tools/schema")
const typeDefs = `
type Query {
  hello(name: String): String
  bye(name: String): String
const resolvers = {
  Query: {
    hello: (root, args, context, info) => {
      console.log(`3. resolver: hello`)
      return `Hello ${args.name ? args.name : "world"}!`
    bye: (root, args, context, info) => {
      console.log(`3. resolver: bye`)
      return `Bye ${args.name ? args.name : "world"}!`
const logInput = async (resolve, root, args, context, info) => {
  console.log(`1. logInput: ${JSON.stringify(args)}`)
  const result = await resolve(root, args, context, info)
  console.log(`5. logInput`)
  return result
const logResult = async (resolve, root, args, context, info) => {
  console.log(`2. logResult`)
  const result = await resolve(root, args, context, info)
  console.log(`4. logResult: ${JSON.stringify(result)}`)
  return result
const schema = makeExecutableSchema({ typeDefs, resolvers })
const schemaWithMiddleware = applyMiddleware(schema, logInput, logResult)
const server = new ApolloServer({
  schema: schemaWithMiddleware,
await server.listen({ port: 8008 })
Siler is a PHP library powered with high-level abstractions to work with GraphQL.
Last release 3 years ago1kMIT License

To run a Siler hello world script:

type Query {
  hello: String
require_once '/path/to/vendor/autoload.php';
use SilerDiactoros;
use SilerGraphql;
use SilerHttp;
$typeDefs = file_get_contents(__DIR__.'/schema.graphql');
$resolvers = [
    'Query' => [
        'hello' => 'world',
$schema = Graphqlschema($typeDefs, $resolvers);
echo "Server running at";
Httpserver(Graphqlpsr7($schema), function (Throwable $err) {
    return Diactorosjson([
        'error'   => true,
        'message' => $err->getMessage(),

It also provides functionality for the construction of a WebSocket Subscriptions Server based on how Apollo works.

A GraphQL query language parser in C++ with C and C++ APIs.
Last release 6 years ago1kMIT License
Generate REST API from your GraphQL API.
Last release 3 months ago1kMIT License
SpectaQL generates static HTML documentation from a GraphQL schema.
1kMIT License

SpectaQL is a Node.js library that generates static documentation for a GraphQL schema using a variety of options:

  • From a live endpoint using the introspection query.
  • From a file containing an introspection query result.
  • From a file, files or glob leading to the schema definitions in SDL.

Out of the box, SpectaQL generates a single 3-column HTML page and lets you choose between a couple built-in themes. A main goal of the project is to be easily and extremely customizable—it is themeable and just about everything can be overridden or customized.

npm install --dev spectaql
# OR
yarn add -D spectaql
# Then generate your docs
npm run spectaql my-config.yml
# OR
yarn spectaql my-config.yml
A Java library that can expose a JPA annotated data model as a GraphQL service over any relational database.
Last release 3 days ago1kOther
A truly type-safe Go GraphQL client.
Last release 3 weeks ago1kMIT License

genqlient is a Go library to easily generate type-safe code to query a GraphQL API. It takes advantage of the fact that both GraphQL and Go are typed languages to ensure at compile-time that your code is making a valid GraphQL query and using the result correctly, all with a minimum of boilerplate.

genqlient provides:

  • Compile-time validation of GraphQL queries: never ship an invalid GraphQL query again!
  • Type-safe response objects: genqlient generates the right type for each query, so you know the response will unmarshal correctly and never need to use interface{}.
  • Production-readiness: genqlient is used in production at Khan Academy, where it supports millions of learners and teachers around the world.
Caliban is a functional library for building GraphQL servers and clients in Scala. It offers with client code generation and type-safe queries.
Last release 3 weeks ago1kApache License 2.0

An example of defining a GraphQL query and running it with caliban:

// define your query using Scala
val query: SelectionBuilder[RootQuery, List[CharacterView]] =
  Query.characters {
    (Character.name ~ Character.nicknames ~ Character.origin)
import sttp.client3._
// run the query and get the result already parsed into a case class
val result = query.toRequest(uri"http://someUrl").send(HttpClientSyncBackend()).body
Caliban is a functional library for building GraphQL servers and clients in Scala. It offers minimal boilerplate and excellent interoperability.
Last release 3 weeks ago1kApache License 2.0

An example of a simple GraphQL schema and query with caliban:

import caliban._
import caliban.schema.Schema.auto._
// schema
case class Query(hello: String)
// resolver
val resolver = RootResolver(Query("Hello world!"))
val api = graphQL(resolver)
for {
  interpreter <- api.interpreter
  result      <- interpreter.execute("{ hello }")
} yield result
An elegant low-level HTTP client for GraphQL.
Last release 5 years ago1kApache License 2.0
Convert GraphQL to IQueryable
1kMIT License
A high performance web server with support for GraphQL. Agoo strives for a simple, easy to use API for GraphQL.
1kMIT License
require 'agoo'
class Query
  def hello
class Schema
  attr_reader :query
  def initialize
    @query = Query.new()
Agoo::Server.init(6464, 'root', thread_count: 1, graphql: '/graphql')
Agoo::GraphQL.schema(Schema.new) {
  Agoo::GraphQL.load(%^type Query { hello: String }^)
# To run this GraphQL example type the following then go to a browser and enter
# a URL of localhost:6464/graphql?query={hello}
# ruby hello.rb
An Elixir implementation of Facebook's GraphQL.
Last release 7 years ago1kOther
A Python 3.6+ (asyncio) library for building GraphQL APIs.
Last release 2 years ago1kMIT License

To run a tartiflette hello world script:

pip install tartiflette

Then run python hello.py with this code in hello.py:

import asyncio
from tartiflette import Engine, Resolver
async def resolver_hello(parent, args, ctx, info):
    return "hello " + args["name"]
async def run():
    tftt_engine = Engine("""
    type Query {
        hello(name: String): String
    result = await tftt_engine.execute(
        query='query { hello(name: "Chuck") }'
    # {'data': {'hello': 'hello Chuck'}}
if __name__ == "__main__":
    loop = asyncio.get_event_loop()

There is also a nice HTTP wrapper.

A GraphQL server for Symfony
Last release 2 weeks ago1kMIT License
Library and command-line code generator to create type-safe Elm code for a GraphQL endpoint.
1kBSD 3-Clause "New" or "Revised" License
GraphQL-ESLint integrates GraphQL AST in the ESLint core (as a parser).
Last release 6 months ago1kMIT License
A GraphQL client implementation in Go.
1kMIT License
A collection of tools for building GraphQL Servers, Gateways, Proxy Servers and Middleware in Go.
Last release 5 months ago1kMIT License

graphql-go-tools implements all basic blocks for building GraphQL Servers, Gateways and Proxy Servers. From lexing, parsing, validation, normalization, all the way up to query planning and execution.

It can also be understood as a GraphQL Compiler, with the ability to add your own backends. Just by implementing a few interfaces, you’re able to teach the compiler how to talk GraphQL to any backend.

The following backends are already implemented: GraphQL, with support for Apollo Federation / Supergraph. Databases: PostgreSQL, MySQL, SQLite, CockroachDB, MongoDB, SQLServer, OpenAPI / REST and Kafka.

To get a sense on how to implement a new backend, check out the Static Data Source, as it’s the simplest one.

It’s used in production by many enterprises for multiple years now, battle tested and actively maintained.

GraphQL server library for OCaml and Reason
Last release 1 year ago1kMIT License
A revolutionary ORM framework for both java and kotlin, it also provides specialized API for rapid development of Spring GraphQL-based applications.
Last release 2 days ago1kApache License 2.0


  1. SpringBoot has introduced Spring GraphQL since 2.7. Jimmer provides specialized API for rapid development of Spring GraphQL-based applications.

  2. Support two APIs: Java API & kotlin API.

  3. Powerful and GraphQL friendly caching support.

  4. Faster than other popular ORM solutions, please see the benchmark: https://babyfish-ct.github.io/jimmer/docs/benchmark/

  5. More powerful than other popular ORM solutions.

    Three aspects should be considered in ORM design:

    a. Query. b. Update. c. Cache.

    Each aspect is aimed at object trees with arbitrary depth rather than simple objects. This distinctive design brings convenience unmatched by other popular solutions.


A GraphQL Client for .NET.
Last release 1 week ago1kMIT License
A GraphQL client that lets you forget about GraphQL.
Last release 2 months ago1kMIT License

SwiftGraphQL is a Swift code generator and a lightweight GraphQL client. It lets you create queries using Swift, and guarantees that every query you create is valid.

The library is centered around three core principles:

🚀 If your project compiles, your queries work. 🦉 Use Swift in favour of GraphQL wherever possible. 🌳 Your application model should be independent of your schema.

Here’s a short preview of the SwiftGraphQL code

import SwiftGraphQL
// Define a Swift model.
struct Human: Identifiable {
    let id: String
    let name: String
    let homePlanet: String?
// Create a selection.
let human = Selection.Human {
        id: try $0.id(),
        name: try $0.name(),
        homePlanet: try $0.homePlanet()
// Construct a query.
let query = Selection.Query {
    try $0.humans(human.list)
// Perform the query.
send(query, to: "http://swift-graphql.heroku.com") { result in
    if let data = try? result.get() {
        print(data) // [Human]
Ferry is a simple, powerful GraphQL Client for Flutter and Dart.
1kMIT License
GraphQLite is a library that offers an annotations-based syntax for GraphQL schema definition.
Last release 1 week ago1kMIT License

It is framework agnostic with bindings available for Symfony and Laravel. This code declares a “product” query and a “Product” Type:

class ProductController
     * @Query()
    public function product(string $id): Product
        // Some code that looks for a product and returns it.
 * @Type()
class Product
     * @Field()
    public function getName(): string
        return $this->name;
    // ...

Other GraphQLite features include validation, security, error handling, loading via data-loader pattern…

Swift library for building GraphQL schemas/types fast, safely and easily.
Last release 4 months ago1kMIT License
A Tool for Writing Declarative, Type-Safe and Data-Driven Applications in SwiftUI using GraphQL and Apollo
Last release 2 years ago494MIT License
A simple Python GraphQL client. Supports generating code generation for types defined in a GraphQL schema.
492ISC License
A GraphQL client implemented in Clojurescript with support for websockets.
Last release 1 year ago455Unknown
Build and execute GraphQL queries in the terminal.
455MIT License

Run gqt against your GraphQL endpoint. Build your query in an intuitive TUI and execute it. The response from the server is written to standard output.

gqt -e https://your.app.com/graphql
GraphQL Armor
The missing GraphQL security layer for Apollo GraphQL and Yoga / Envelop servers.
Last release 3 months ago455MIT License
GraphQL Live Query
Real-Time with GraphQL for any GraphQL schema or transport.
Last release 1 year ago433MIT License
A Go/Golang library to help construct a graphql-go server supporting react-relay.
422MIT License
Tiny GraphQL client library using template strings.
422MIT License
GraphQL Language Service
An interface for building GraphQL language services for IDEs (diagnostics, autocomplete etc).
A strongly-typed GraphQL client implementation in Haksell.
Last release 11 months ago400MIT License
Morpheus GraphQL
A Haskell library for building GraphQL APIs.
Last release 11 months ago400MIT License

Hello world example with morpheus-graphql:

# schema.gql
A supernatural being considered divine and sacred
type Deity {
  name: String!
  power: String @deprecated(reason: "no more supported")
type Query {
  deity(name: String! = "Morpheus"): Deity!
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeFamilies #-}
module API (api) where
import Data.ByteString.Lazy.Char8 (ByteString)
import Data.Morpheus (interpreter)
import Data.Morpheus.Document (importGQLDocument)
import Data.Morpheus.Types (RootResolver (..), Undefined (..))
import Data.Text (Text)
importGQLDocument "schema.gql"
rootResolver :: RootResolver IO () Query Undefined Undefined
rootResolver =
    { queryResolver = Query {deity},
      mutationResolver = Undefined,
      subscriptionResolver = Undefined
    deity DeityArgs {name} =
          { name = pure name,
            power = pure (Just "Shapeshifting")
api :: ByteString -> IO ByteString
api = interpreter rootResolver

See morpheus-graphql-examples for more sophisticated APIs.

Entity GraphQL
A GraphQL library for .NET Core. Easily expose you data model as a GraphQL API or bring together multiple data sources into a single GraphQL schema.
Last release 1 week ago376MIT License
// expose an existing data model with ASP.NET & EF Core
public class Startup {
  public void ConfigureServices(IServiceCollection services)
      // Auto build a schema from DemoContext. Alternatively you can build one from scratch
      services.AddGraphQLSchema<DemoContext>(options =>
          // modify the schema (add/remove fields or types), add other services
  public void Configure(IApplicationBuilder app, DemoContext db)
      app.UseEndpoints(endpoints =>
          // defaults to /graphql endpoint
A GraphQL Go client with Mutation, Query and Subscription support.
Last release 3 weeks ago366MIT License
Zero-dependency, HTTP/1 safe, simple, GraphQL over Server-Sent Events Protocol server and client.
Last release 3 months ago365MIT License
Zero-dependency, HTTP/1 safe, simple, GraphQL over Server-Sent Events Protocol server and client.
Last release 3 months ago365MIT License
A PHP GraphQL Framework.
Last release 5 years ago360MIT License
Gato GraphQL
Interact with all your data in WordPress
Last release 10 hours ago349GNU General Public License v2.0
A bring your own types GraphQL client for Rust
Last release 2 days ago335Mozilla Public License 2.0

A client library for rust that generates queries from types you provide, verifying that the types match the shape of your schema.

It provides a generator to bootstrap types from existing GraphQL queries.

Usage example:

#[derive(cynic::QueryFragment, Debug)]
    schema_path = "../schemas/starwars.schema.graphql",
    query_module = "query_dsl",
    graphql_type = "Root",
    argument_struct = "FilmArguments"
struct FilmDirectorQuery {
    #[arguments(id = &args.id)]
    film: Option<Film>,
#[derive(cynic::QueryFragment, Debug)]
    schema_path = "../schemas/starwars.schema.graphql",
    query_module = "query_dsl",
    graphql_type = "Film"
struct Film {
    title: Option<String>,
    director: Option<String>,
struct FilmArguments {
    id: Option<cynic::Id>,
fn main() {
    use cynic::{QueryBuilder, http::ReqwestBlockingExt};
    let query = FilmDirectorQuery::build(&FilmArguments {
        id: Some("ZmlsbXM6MQ==".into()),
mod query_dsl {
Mu-Haskell with Mu-GraphQL
A Haskell library for building microservices (gRPC, HTTP) and GraphQL APIs.
Last release 3 years ago325Apache License 2.0

Example implementation of a GraphQL server with type-level representation of the schema auto-generated:

{-# LANGUAGE DataKinds #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PartialTypeSignatures #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
-- imports omitted for brevity...
graphql "Library" "library.graphql" -- all the magic happens here! 🪄🎩
-- ... a bit more code...
libraryServer :: SqlBackend -> ServerT ObjectMapping i Library ServerErrorIO _
libraryServer conn =
    ( object @"Book"
        ( field @"id" bookId,
          field @"title" bookTitle,
          field @"author" bookAuthor,
          field @"imageUrl" bookImage
      object @"Author"
        ( field @"id" authorId,
          field @"name" authorName,
          field @"books" authorBooks
      object @"Query"
        ( method @"authors" allAuthors,
          method @"books" allBooks
      object @"Mutation"
        ( method @"newAuthor" newAuthor,
          method @"newBook" newBook
      object @"Subscription"
        (method @"allBooks" allBooksConduit)
    bookId :: Entity Book -> ServerErrorIO Integer
    bookId (Entity (BookKey k) _) = pure $ toInteger k
    -- ... more resolvers...

See our docs for more information about how to build your own GraphQL server and the library example for a more end-to-end example that includes a client written in Elm!

A GraphQL client for Elixir
GraphQL implementation in Erlang.
Last release 5 years ago314Other
A GraphQL JVM Client designed for constructing queries from standard model definitions. By American Express.
Last release 4 years ago305Apache License 2.0
KGraphQL is a Kotlin implementation of GraphQL. It provides a rich DSL to set up the GraphQL schema.
Last release 1 year ago292MIT License

Here’s an example on how to create a simple schema based on a kotlin data class plus a property resolver that gets applied onto your class.

data class Article(val id: Int, val text: String)
fun main() {
    val schema = KGraphQL.schema {
        query("article") {
            resolver { id: Int?, text: String ->
                Article(id ?: -1, text)
        type<Article> {
            property<String>("fullText") {
                resolver { article: Article ->
                    "${article.id}: ${article.text}"
            article(id: 5, text: "Hello World") {

KGraphQL is using coroutines behind the scenes to provide great asynchronous performance.

See KGraphQL docs for more in depth usage.

Ktor Plugin

KGraphQL has a Ktor plugin which gives you a fully functional GraphQL server with a single install function call. Example below shows how to set up a GraphQL server within Ktor and it will give you a GraphQL Playground out of the box by entering localhost:8080/graphql.

fun Application.module() {
  install(GraphQL) {
    playground = true
    schema {
      query("hello") {
        resolver { -> "World!" }

You can follow the Ktor tutorial to set up a KGraphQL server with ktor from scratch up.

A Clojure library that provides a GraphQL implementation.
282Eclipse Public License 1.0

Code that executes a hello world GraphQL query with graphql-clj:

(def schema "type QueryRoot {
    hello: String
(defn resolver-fn [type-name field-name]
  (get-in {"QueryRoot" {"hello" (fn [context parent & rest]
                              "Hello world!")}}
          [type-name field-name]))
(require '[graphql-clj.executor :as executor])
(executor/execute nil schema resolver-fn "{ hello }")
An all purpose GraphQL client with view layer integrations for multiple frameworks in just 1.6kb.
Last release 5 years ago274MIT License
Simple, pluggable, zero-dependency, GraphQL over HTTP spec compliant server, client and audit suite.
Last release 6 months ago274MIT License
Simple, pluggable, zero-dependency, GraphQL over HTTP spec compliant server, client and audit suite.
Last release 6 months ago274MIT License
Simple, pluggable, zero-dependency, GraphQL over HTTP spec compliant server, client and audit suite.
Last release 6 months ago274MIT License
A library to help construct a graphql-php server supporting react-relay.
Last release 2 years ago271BSD 3-Clause "New" or "Revised" License
Apollo Studio
A cloud service that helps you build, validate, monitor and secure your organizations data graph.
ZeroQL is a open-source GraphQL client for C#
Last release 1 month ago238MIT License

The ZeroQL is a high-performance C#-friendly GraphQL client. It supports Linq-like syntax, and doesn’t require Reflection.Emit or expressions. As a result, at runtime provides performance very close to a raw HTTP call.

You can use ZeroQL to:

  • Generate a C# client from GraphQL schema.
  • Generate and execute graphql queries from your C# code.
  • Don’t require writing GraphQL manually.
  • Supports .Net Core, .Net Framework, Xamarin, Unity apps.
var userId = 10;
var response = await qlClient.Query(q => q
    .User(userId, o => new
Ariadne Codegen
Generate fully typed Python GraphQL client from any schema and queries.
Last release 3 weeks ago195BSD 3-Clause "New" or "Revised" License

Install Ariadne Codegen:

$ pip install ariadne-codegen

Create queries.graphql file:

mutation CreateToken($username: String!, $password: String!) {
  createToken(username: $username, password: $password) {
    errors {

Add [ariadne-codegen] section to your pyproject.toml:

queries_path = "queries.graphql"
remote_schema_url = "http://example.com/graphql/"

Generate client:

$ ariadne-codegen

And use it in your Python projects:

from graphql_client import Client
with Client("http://example.com/graphql/") as client:
    result = client.create_token(username="Admin", password="Example123)
    if result.errors:
        error = result.errors[0]
        raise ValidationError({error.field: error.message})
    auth_token = result.token
Rails GraphQL
A Fresh new GraphQL server for Rails applications, with a focus on natural and Ruby-like DSL
Last release 1 month ago165MIT License
require 'rails-graphql'
class GraphQL::AppSchema < GraphQL::Schema
  query_fields do
    field(:hello).resolve { 'Hello World!' }
puts GraphQL::AppSchema.execute('{ hello }')

Less is more! Please check it out the docs.

Simple GraphQL client for Python 2.7+.
155MIT License
A set of reusable GraphQL components for Clojure conforming to the data structures given in alumbra.spec.
Last release 6 years ago148MIT License
(require '[alumbra.core :as alumbra]
         '[claro.data :as data])
(def schema
  "type Person { name: String!, friends: [Person!]! }
   type QueryRoot { person(id: ID!): Person, me: Person! }
   schema { query: QueryRoot }")
(defrecord Person [id]
  (resolve! [_ _]
    {:name    (str "Person #" id)
     :friends (map ->Person  (range (inc id) (+ id 3)))}))
(def QueryRoot
  {:person (map->Person {})
   :me     (map->Person {:id 0})})
(def app
    {:schema schema
     :query  QueryRoot}))
(defonce my-graphql-server
  (aleph.http/start-server #'app {:port 3000}))
$ curl -XPOST "http://0:3000" -H'Content-Type: application/json' -d'{
  "query": "{ me { name, friends { name } } }"
{"data":{"me":{"name":"Person #0","friends":[{"name":"Person #1"},{"name":"Person #2"}]}}}
The Ballerina Standard Library Package for consume GraphQL services.
Last release 1 month ago144Apache License 2.0

To run a ballerina-graphql client:

  • Download and install Ballerina Language
  • Then run bal run graphql_client.bal to run the service, with this code in the graphql_client.bal file:
import ballerina/graphql;
import ballerina/io;
type Response record {
    record { string hello; } data;
public function main() returns error? {
    graphql:Client helloClient = check new ("localhost:9090/graphql");
    string document = "{ hello }";
    Response response = check helloClient->execute(document);


  • Dependently-typed response retrieval with Ballerina type inferring
  • Custom client generation support
The Ballerina Standard Library Package for write GraphQL services.
Last release 1 month ago144Apache License 2.0

To run a ballerina-graphql hello world server:

  • Download and install Ballerina Language
  • Then run bal run graphql_service.bal to run the service, with this code in the graphql_service.bal file:
import ballerina/graphql;
service /graphql on new graphql:Listener(9090) {
    resource function get hello() returns string {
        return "Hello, world!";


  • Built with Ballerina service and listener model, which are first-class citizens in Ballerina
  • Supports subscriptions over websocket (No additional libraries needed)
  • Supports file upload
  • Built-in GraphiQL client
Swift library for writing Declarative, Type-Safe GraphQL APIs with Zero Boilerplate.
Last release 2 years ago143MIT License
GraphQL client for TypeScript, automatically infers the type of the returned data according to the strongly typed query request
Last release 3 months ago142MIT License
General purpose GraphQL R client
Last release 4 years ago141Other
A Julia GraphQL server implementation.
Last release 1 year ago112MIT License
A lightweight graphql calculation engine.
Last release 2 years ago104Apache License 2.0

GraphQL Calculator is a lightweight graphql calculation engine, which is used to alter execution behavior of graphql query.

Here are some examples on how to use GraphQL Calculator on graphql query.

query basicMapValue($userIds: [Int]) {
  userInfoList(userIds: $userIds) {
    fullName: stringHolder @map(mapper: "firstName + lastName")
query filterUserByAge($userId: [Int]) {
  userInfoList(userIds: $userId) @filter(predicate: "age>=18") {
query parseFetchedValueToAnotherFieldArgumentMap($itemIds: [Int]) {
  itemList(itemIds: $itemIds) {
    # save sellerId as List<Long> with unique name "sellerIdList"
    sellerId @fetchSource(name: "sellerIdList")
  userInfoList(userIds: 1)
    # transform the argument of "userInfoList" named "userIds" according to expression "sellerIdList" and expression argument,
    # which mean replace userIds value by source named "sellerIdList"
      argumentName: "userIds"
      operateType: MAP
      expression: "sellerIdList"
      dependencySources: ["sellerIdList"]
    ) {

See graphql-calculator README for more information.

Typetta is an open-source ORM written in TypeScript that aims to allow seamless access to data in a typed fashion to all main SQL databases (MySQL, PostgreSQL, Microsoft SQL Server, SQLLite3, CockroachDB, MariaDB, Oracle & Amazon Redshift) and also to the NoSQL database MongoDB.
Last release 5 months ago98Apache License 2.0
Basic example GraphQL client for .NET.
94MIT License
MicroProfile GraphQL
MP GraphQL is a code-first specification for building GraphQL applications. It uses annotations and design patterns similar to JAX-RS to enable rapid development.
Last release 2 years ago94Apache License 2.0

MicroProfile GraphQL is a GraphQL server and client specification for building GraphQL applications. It’s unique annotation-based API approach enables rapid application development. Applications coded to the MP GraphQL APIs are portable, and can be deployed into Java server runtimes such as Open Liberty, Quarkus, Helidon and Wildfly. This means that your applications can make use of other Jakarta and MicroProfile technologies.

MP GraphQL features include:

  • Annotation-based APIs
  • Integration with Jakarta CDI
  • Type-safe and dynamic client APIs
  • Exception handling
  • Easy integration with Jakarta and MicroProfile technologies

Want to get started? Check out these resources:

Or these videos:

An automatic GraphQL schema generator for GORM
Last release 3 months ago80Apache License 2.0

Core Library - The GORM GraphQL library provides functionality to generate a GraphQL schema based on your GORM entities. In addition to mapping domain classes to a GraphQL schema, the core library also provides default implementations of “data fetchers” to query, update, and delete data through executions of the schema.

Grails Plugin - In a addition to the Core Library, the GORM GraphQL Grails Plugin:

  • Provides a controller to receive and respond to GraphQL requests through HTTP, based on their guidelines.

  • Generates the schema at startup with spring bean configuration to make it easy to extend.

  • Includes a GraphiQL browser enabled by default in development. The browser is accessible at /graphql/browser.

  • Overrides the default data binder to use the data binding provided by Grails

  • Provides a trait to make integration testing of your GraphQL endpoints easier

See the documentation for more information.

Develop spec compliant GraphQL servers in Go.
Last release 3 years ago76MIT License
A Perl port of GraphQL reference implementation
GraphQL iOS
An Objective-C GraphQL client for iOS.
62MIT License
A simple JavaScript GraphQL client,Let the *.gql file be used as a module through webpack loader.
GraphQL Java Generator
GraphQL Java Generator is a tool that generates Java code to speed up development for Client and Server of GraphQL APIs
51MIT License
  • GraphQL Java client: it generates the Java classes that call the GraphQL endpoint, and the POJO that will contain the data returned by the server. The GraphQL endpoint can then be queried by using a simple call to a Java method (see sample below)
  • GraphQL Java server: it is based on graphql-java (listed here above). It generates all the boilerplate code. You’ll only have to implement what’s specific to your server, which are the joins between the GraphQL types. GraphQL Java Generator is available as a Maven Plugin. A Gradle plugin is coming soon. Please note that GraphQL Java Generator is an accelerator: the generated code doesn’t depend on any library specific to GraphQL Java Generator. So, it helps you to start building application based on graphql-java. Once the code is generated, you can decide to manually edit it as any standard java application, and get rid of GraphQL Java Generator. Of course you can, and should, according to us :), continue using GraphQL Java Generator when your project evolves.
GQL is a Groove library for GraphQL
Last release 1 year ago47Apache License 2.0
Minimal GraphQL client for Rust
47MIT License

Usage example

use gql_client::Client;
async fn main() -> Result<(), Box<dyn std::error::Error>> {
  let endpoint = "https://graphqlzero.almansi.me/api";
  let query = r#"
    query AllPostsQuery {
      posts {
        data {
  let client = Client::new(endpoint);
  let data: AllPosts = client.query::<AllPosts>(query).await.unwrap();
  println!("{:?}" data);
A Julia GraphQL client for seamless integration with a GraphQL server
Last release 1 year ago46Other
  • Querying, mutating and subscribing without manual writing of query strings (unless you want to!)
  • Deserializing responses directly into Julia types
  • Construction of Julia types from GraphQL objects
  • Using introspection to help with querying


Install with Julia’s package manager

using Pkg; Pkg.add("GraphQLClient")
using GraphQLClient

Connect to a server

client = Client("https://countries.trevorblades.com")

Build a Julia type from a GraphQL object

Country = GraphQLClient.introspect_object(client, "Country")

And query the server, deserializing the response into this new type

response = query(client, "countries", Vector{Country}, output_fields="name")

Alternatively write the query string manually

query_string = """
response = GraphQLClient.execute(client, query_string)
Complete GraphQL query string generation for python.
Last release 1 month ago45MIT License

graphql_query is complete GraphQL query string builder for python. With graphql_query you can The documentation for graphql_query can be found at https://denisart.github.io/graphql-query.

$ pip install graphql_query

Code for the simple query

  hero {

it is

from graphql_query import Operation, Query
hero = Query(name="hero", fields=["name"])
operation = Operation(type="query", queries=[hero])
query {
  hero {

For generation of the following query

query Hero($episode: Episode, $withFriends: Boolean!) {
  hero(episode: $episode) {
    friends @include(if: $withFriends) {

we have

from graphql_query import Argument, Directive, Field, Operation, Query, Variable
episode = Variable(name="episode", type="Episode")
withFriends = Variable(name="withFriends", type="Boolean!")
arg_episode = Argument(name="episode", value=episode)
arg_if = Argument(name="if", value=withFriends)
hero = Query(
            directives=[Directive(name="include", arguments=[arg_if])]
operation = Operation(
    variables=[episode, withFriends],
query Hero(
  $episode: Episode
  $withFriends: Boolean!
) {
    episode: $episode
  ) {
    friends @include(
      if: $withFriends
    ) {
A fast and modern graphql client designed with simplicity in mind.
Last release 1 year ago45MIT License

Here’s an example of a qlient hello world.

first install the library:

pip install qlient

Create a swapi_client_example.py file with this content:

from qlient.http import HTTPClient, GraphQLResponse
client = HTTPClient("https://swapi-graphql.netlify.app/.netlify/functions/index")
res: GraphQLResponse = client.query.film(
    # swapi graphql input fields
    # qlient specific
    _fields=["id", "title", "episodeID"]
print(res.request.query)  # query film($id: ID) { film(id: $id) { id title episodeID } }
print(res.request.variables)  # {'id': 'ZmlsbXM6MQ=='}
print(res.data)  # {'film': {'id': 'ZmlsbXM6MQ==', 'title': 'A New Hope', 'episodeID': 4}}

Close the file and run it using python:

python swapi_client_example.py
GraphQL client which supports generating queries from C# classes
Last release 3 years ago43MIT License
Elixir GraphQL Client with HTTP and WebSocket support
Last release 3 years ago43MIT License
Create a serverless GraphQL API based on your data sources (REST & Databases), Third-Party APIs, or any combination. Instead of writing a GraphQL server yourself, you can define everything declaratively by writing GraphQL schemas. For more information, go to https://www.stepzen.com/.
40MIT License
A GraphQL implementation for modern PHP. Includes features from latest draft, middleware directives and modules with extra functionality.
Last release 4 months ago39MIT License

GraPHPinator is feature complete PHP implementation of GraphQL server. Its job is transformation of query string into resolved Json result for a given Schema.

  • Aims to be compliant with the latest draft of GraphQL specification.
  • Fully typesafe, and therefore minimum required PHP version is 8.0. Sacrafices a tiny bit of convenience for huge amount of clarity and safety - no random configuration arrays, no mixed types, no variable function arguments - this library doesnt try to save you from verbosity, but makes sure you always know what you’ve got.
  • Code first.
  • Flexible. Easy to extend with extra functionality using Modules or middleware Directives.
  • Includes some opt-in extensions which are out of scope of official specs:
  • Project is composed from multiple smaller packages, which may be used standalone:
    • Tokenizer - Lexical analyzer of GraphQL document.
    • Parser - Syntactic analyzer of GraphQL document.
A set of packages for implementing high-performant GraphQL servers in .NET. Faithful implementation of official 2018 Specification. Features batched execution support (aka Data Loader); support for custom scalars; HTTP server based on ASP.NET Core; parsed query cache; modular API construction (equivalent of schema stiching); full introspection support; runtime metrics and quotas.
37MIT License
A GraphQL implementation for the D Programming Language.
Last release 3 months ago34GNU Lesser General Public License v3.0
Easy to use, complete Go implementation of GraphQL. Simple and schema-less.
32MIT License

The purpose of Eggql is to make it as simple as possible to create a GraphQL server. You don’t need to create GraphQL schema (though you can view the schema that is created if interested). It is currently in beta release but is a complete implementation of a GraphQL server apart from subscriptions.

Just to be clear it supports all of these GraphQL features: arguments (including defaults), objects/lists/enums/input/interface/union types, aliases, fragments, variables, directives, mutations, inline fragments, descriptions, introspection and custom scalars.

Tests (jMeter) show that it is as fast or faster than other Go implementations for simple queries. We’re working on enhancements for performance including caching, data-loader, complexity-limits, etc.

To run an eggql hello world server just build and run this Go program:

package main

import "github.com/andrewwphillips/eggql"

func main() {
	http.Handle("/graphql", eggql.New(struct{ Message string }{Message: "hello, world"}))
	http.ListenAndServe(":80", nil)

This creates a root Query object with a single message field. To test it send a query with curl:

$ curl -XPOST -d '{"query": "{ message }"}' localhost:80/graphql

and you will get this response:

  "data": {
    "message": "hello, world"
A library to query and manipulate GraphQL Introspection Query results.
30MIT License

Microfiber is a JavaScript library that allows:

  • Digging through your Introspection Query Results for a specific Query, Mutation, Type, Field, Argument or Subscription.
  • Removing a specific Query, Mutation, Type, Field/InputField, Argument or Subscription from your Introspection Query Results.
  • Removing Queries, Mutations, Fields/InputFields or Arguments that refer to Type that does not exist in - or has been removed from - your Introspection Query Results.
npm install microfiber
# OR
yarn add microfiber

Then in JS:

import { Microfiber } from "microfiber"
const introspectionQueryResults = {
  // ...
const microfiber = new Microfiber(introspectionQueryResults)
// ...do some things to your schema with `microfiber`
const cleanedIntrospectonQueryResults = microfiber.getResponse()
GraphQLBox client
An extensible GraphQL client with modules for react, caching, request parsing, web workers, websockets and more...
23MIT License

The example below installs and initializes the GraphQLBox client with a persisted cache and debugging enabled.

npm install @graphql-box/core @graphql-box/client @graphql-box/request-parser @graphql-box/cache-manager @graphql-box/debug-manager @graphql-box/fetch-manager @graphql-box/helpers @cachemap/core @cachemap/reaper @cachemap/indexed-db @cachemap/constants @cachemap/types
import Cachemap from "@cachemap/core"
import indexedDB from "@cachemap/indexed-db"
import reaper from "@cachemap/reaper"
import CacheManager from "@graphql-box/cache-manager"
import Client from "@graphql-box/client"
import DebugManager from "@graphql-box/debug-manager"
import FetchManager from "@graphql-box/fetch-manager"
import RequestParser from "@graphql-box/request-parser"
import introspection from "./introspection-query"
const requestManager = new FetchManager({
  apiUrl: "/api/graphql",
  batchRequests: true,
  logUrl: "/log/graphql",
const client = new Client({
  cacheManager: new CacheManager({
    cache: new Cachemap({
      name: "client-cache",
      reaper: reaper({ interval: 300000 }),
      store: indexedDB(/* configure */),
    cascadeCacheControl: true,
    typeCacheDirectives: {
      // Add any type specific cache control directives in the format:
      // TypeName: "public, max-age=3",
  debugManager: new DebugManager({
    environment: "client",
    log: (message, data, logLevel) => {
      requestManager.log(message, data, logLevel)
    name: "CLIENT",
    performance: self.performance,
  requestParser: new RequestParser({ introspection }),
// Meanwhile... somewhere else in your code
const { data, errors } = await client.request(queryOrMutation)
GraphQLBox server
An extensible GraphQL server with modules for caching, request parsing, debugging, subscriptions and more...
23MIT License

The example below installs and initializes the GraphQLBox server with a persisted cache and debugging enabled.

npm install @graphql-box/core @graphql-box/server @graphql-box/client @graphql-box/request-parser @graphql-box/cache-manager @graphql-box/debug-manager @graphql-box/execute @graphql-box/helpers @cachemap/core @cachemap/reaper @cachemap/redis @cachemap/constants @cachemap/types
import Cachemap from "@cachemap/core"
import redis from "@cachemap/redis"
import reaper from "@cachemap/reaper"
import CacheManager from "@graphql-box/cache-manager"
import Client from "@graphql-box/client"
import DebugManager from "@graphql-box/debug-manager"
import Execute from "@graphql-box/execute"
import RequestParser from "@graphql-box/request-parser"
import Server from "@graphql-box/server"
import { makeExecutableSchema } from "@graphql-tools/schema"
import { performance } from "perf_hooks"
import { schemaResolvers, schemaTypeDefs } from "./schema"
import logger from "./logger"
const schema = makeExecutableSchema({
  typeDefs: schemaTypeDefs,
  resolvers: schemaResolvers,
const server = new Server({
  client: new Client({
    cacheManager: new CacheManager({
      cache: new Cachemap({
        name: "server-cache",
        reaper: reaper({ interval: 300000 }),
        store: redis(/* configure */),
      cascadeCacheControl: true,
      typeCacheDirectives: {
        // Add any type specific cache control directives in the format:
        // TypeName: "public, max-age=3",
    debugManager: new DebugManager({
      environment: "server",
      log: (...args) => {
      name: "SERVER",
    requestManager: new Execute({ schema }),
    requestParser: new RequestParser({ schema }),
// Meanwhile... somewhere else in your code
app.use("api/graphql", graphqlServer.request())
Complete set of library tools to abstract relational database schemas with SQL, query with GraphQL, and return GraphQL results

One time setup: build schema, deploy as microservice or within server, query SQL database with GraphQL!

Django Graphbox