Meteor
Meteor exposes httpServer server through the meteor/webapp package, so you can use it the same way as any other http server:
import { WebApp } from 'meteor/webapp';
import { execute, subscribe } from 'graphql';
import { SubscriptionServer } from 'subscriptions-transport-ws';
import { myGraphQLSchema } from './my-schema';
new SubscriptionServer({
schema: myGraphQLSchema,
execute,
subscribe,
}, {
server: WebApp.httpServer,
path: '/subscriptions',
});