Apollo Federation
Overview
Federated Schemas
OverviewSchema TypesSchema CompositionSharing Types (Value Types)

Federation Reference

Federation ChangelogFederation DirectivesComposition Rules

Subgraph Reference

Federation Subgraphs SpecificationSubgraph Specific FieldsCompatible Subgraph Libraries

Development and Tooling

Query PlansComposition HintsErrors

From Federation 1 to 2

Upgrade GuideFederation 2 Backwards Compatibility
Entities
Introduction

Entity Essentials

Entity FieldsAdvanced KeysEntity Interfaces

Entity Guides

Entity Best PracticesMigrate FieldsResolve Another Subgraph's FieldsEnforce OwnershipUse Contexts
Schema Design Guides

Schema Design Principles

Demand Oriented Schema DesignNaming ConventionsNamespacing

Server-Driven UI

BasicsSchema DesignClient Design

Data Handling Techniques

Handling the N+1 ProblemNullabilityInterfacesResponse Type PatternErrors as DataAggregating DataGraph Identities

Schema Development and Evolution

Mocking to Unblock DevelopmentDeprecationsDistributed OrchestrationMigrating from a MonolithMigrating from Schema Stitching

Federated Directives

Choosing the Right DirectiveUsing @shareableUsing @provides
Products
Apollo GraphOS PlatformManage, observe, and scale your graph.GraphOS Agent ServicesPreviewGovern how agents access your graph.Apollo ConnectorsConnect REST APIs to your graph declaratively.Apollo FederationFederate multiple subgraphs into a single supergraph.Rover CLIInteract with your graph from the command line.Apollo RouterRun and configure your graph gateway.Apollo OperatorDeploy and manage Apollo Router on Kubernetes.
Open source
Apollo Client (Web)Simplify GraphQL data management in web apps.Apollo iOSSwift-first GraphQL client for iOS.Apollo KotlinKotlin-first GraphQL client for Android and JVM.Apollo ServerBuild GraphQL servers with Node.js.Apollo MCP ServerExpose GraphQL tools to AI agents with MCP.IDE SupportEnhance your development workflow with IDE support.GraphOS Router Support ToolDiagnose and troubleshoot your GraphOS Router.
Resources

Federation-Compatible Subgraph Implementations

Reference for compatible GraphQL server libraries

The following open-source GraphQL server libraries and hosted solutions support acting as a subgraph in a federated supergraph. Their support is tracked in Apollo's subgraph compatibility repository. Check out the repository for details on the compatibility tests listed in the table below.

tip
To add a subgraph to this list, open a GitHub issue or check out the Apollo Federation Subgraph Maintainers Implementation Guide to learn how to submit a PR for your implementation.

The following open-source GraphQL server libraries and other solutions support acting as a subgraph in a federated supergraph.

Table Legend

IconDescription
Maintained by ApolloMaintained by Apollo
🟢Functionality is supported
❌Critical functionality is NOT supported
🔲Additional federation functionality is NOT supported
note
Compatibility results are temporarily unavailable. See the subgraph compatibility repository for the latest results.