About WunderGraph Cosmo
WunderGraph Cosmo is a GraphQL federation platform for combining many services into one supergraph. Its router is open source, and it can be self-hosted or run as a managed service.
What it does
Cosmo lets platform teams compose subgraphs into a supergraph, run composition checks before schema changes ship, and route client queries through its router. It handles subscriptions by taking events from Kafka, NATS or Redis. It can also turn approved GraphQL operations into MCP tools for AI agents. The page lists audit logs and role-based access control as part of the governance features.
Key features
- Compose subgraphs into one supergraph
- Composition checks before schema changes ship
- Subscriptions through Kafka, NATS and Redis
- Turn approved operations into MCP tools
Who it's for
- Platform engineering teams
- Backend teams running many services
- Engineering leaders scaling GraphQL across teams
Pricing and good to know
The router is open source, and the site says there are no usage penalties. Teams can self-host or use the managed version. The site offers a free start and a demo request, and a pricing page lists managed plan details.
Highlights
- Compose subgraphs into one supergraph
- Composition checks before schema changes ship
- Subscriptions through Kafka, NATS and Redis
- Turn approved operations into MCP tools
