# 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.

[WunderGraph Cosmo](/content/site-root.html)