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Published on
March 15, 2026
GraphQL Federation — Composing a Unified API From Multiple Microservices
graphql federation microservices apollo scalability
Build federated GraphQL APIs across microservices. Learn Apollo Federation architecture, @key and @external directives, entity resolution, router configuration, performance with DataLoader, query planning, cost limits, and observability.

Apollo

apollo (1)

GraphQL Federation — Composing a Unified API From Multiple Microservices