This is the documentation for the old GraphQL Yoga version 4. We recommend upgrading to the latest GraphQL Yoga version 5.

Migrate to GraphQL Yoga v5

Integration with SvelteKit

SvelteKit is the fastest way to build svelte apps. It is very simple, and let you build frontend & backend in a single place.

You can add GraphQL Yoga with a few lines of code and get the benefits of GraphQL & SvelteKit at the same time. Envelop ecosystem for example!


In a SvelteKit project:

npm i graphql-yoga graphql


Create your graphql endpoint

Create the file src/routes/api/graphql/+server.ts:

import { createSchema, createYoga } from 'graphql-yoga'
import type { RequestEvent } from '@sveltejs/kit'
const yogaApp = createYoga<RequestEvent>({
  schema: createSchema({
    typeDefs: `
			type Query {
				hello: String
    resolvers: {
      Query: {
        hello: () => 'SvelteKit - GraphQL Yoga'
  // Needed to be defined explicitly because our endpoint lives at a different path other than `/graphql`
  graphqlEndpoint: '/api/graphql',
  // Needed to let Yoga use sveltekit's Response object
  fetchAPI: globalThis
export { yogaApp as GET, yogaApp as POST }

Simple example on our GitHub repository here.

More examples with our KitQL library here.
The best of all GraphQL ecosystem for SvelteKit.