---
title: Koa
description: Setting up Apollo Server with Koa
---

[![npm version](https://badge.fury.io/js/apollo-server-koa.svg)](https://badge.fury.io/js/apollo-server-koa) [![Build Status](https://circleci.com/gh/apollographql/apollo-server.svg?style=svg)](https://circleci.com/gh/apollographql/apollo-server) [![Coverage Status](https://coveralls.io/repos/github/apollographql/apollo-server/badge.svg?branch=master)](https://coveralls.io/github/apollographql/apollo-server?branch=master) [![Get on Slack](https://img.shields.io/badge/slack-join-orange.svg)](https://www.apollographql.com/#slack)

This is the Koa integration of GraphQL Server. Apollo Server is a community-maintained open-source GraphQL server that works with many Node.js HTTP server frameworks. [Read the docs](https://www.apollographql.com/docs/apollo-server/). [Read the CHANGELOG.](https://github.com/apollographql/apollo-server/blob/master/CHANGELOG.md)

```sh
npm install apollo-server-koa@rc graphql
```

## Koa

```js
const Koa = require('koa');
const { ApolloServer, gql } = require('apollo-server-koa');

// Construct a schema, using GraphQL schema language
const typeDefs = gql`
  type Query {
    hello: String
  }
`;

// Provide resolver functions for your schema fields
const resolvers = {
  Query: {
    hello: () => 'Hello world!',
  },
};

const server = new ApolloServer({ typeDefs, resolvers });

const app = new Koa();
server.applyMiddleware({ app });

app.listen({ port: 4000 }, () =>
  console.log(`🚀 Server ready at http://localhost:4000${server.graphqlPath}`),
);
```

## Principles

GraphQL Server is built with the following principles in mind:

- **By the community, for the community**: GraphQL Server's development is driven by the needs of developers
- **Simplicity**: by keeping things simple, GraphQL Server is easier to use, easier to contribute to, and more secure
- **Performance**: GraphQL Server is well-tested and production-ready - no modifications needed

Anyone is welcome to contribute to GraphQL Server, just read [CONTRIBUTING.md](https://github.com/apollographql/apollo-server/blob/master/CONTRIBUTING.md), take a look at the [roadmap](https://github.com/apollographql/apollo-server/blob/master/ROADMAP.md) and make your first PR!