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Cosmo: Open-Source GraphQL Federation Solution
Unify distributed APIs into one federated graph. Platform teams get observability and control. Service teams ship independently.
Federate Any API, Not Just GraphQL
Connect REST, gRPC, and GraphQL services without rewrites. Cosmo Connect wraps existing APIs into your graph without forcing migrations.
Track Every Query Across Your Entire Graph
Native OpenTelemetry tracing from gateway to subgraph. Find slow queries and failing services in seconds with zero instrumentation required.
Catch Breaking Changes Before Deployment
Schema checks run automatically in CI/CD. Service teams ship on their own schedule, while platform teams prevent breaking changes from reaching production.
Built for Scale and Performance
Go router with sub-millisecond overhead. Deploy with built-in caching, rate limiting, and security controls wherever your infrastructure lives.