Configure Apollo Federation Data Source

With the Apollo Federation data source, you can introspect multiple SubGraphs, and WunderGraph will automatically combine them into a SuperGraph, applies namespacing and will add the resulting GraphQL Schema to your virtual Graph.

const federatedApi = introspect.federation({
  apiNamespace: 'federated',
  upstreams: [
    {
      url: 'http://localhost:4001/graphql',
    },
    {
      url: 'http://localhost:4002/graphql',
    },
    {
      url: 'http://localhost:4003/graphql',
    },
    {
      url: 'http://localhost:4004/graphql',
    },
  ],
});

configureWunderGraphApplication({
  apis: [federatedApi],
});

Simply add all the URLs of your SubGraphs to the upstreams array. Aside from the url, you can also define a headers configuration, you can configure mTLS, or set a different URL for subscriptions by setting subscriptionsURL.

Refer to the configure introspection for protected API guide.