WunderGraph Cosmo Router on Ubuntu 24.04 LTS

Overview

WunderGraph Cosmo Router is the open source data plane of the Cosmo GraphQL federation platform: a single, statically compiled gateway that stitches many independent GraphQL services, called subgraphs, into one federated graph that clients query through a single endpoint. Written in Go and distributed as one dependency free binary, it starts instantly, uses very little memory, and needs no external database or control plane to run. The router plans and executes federated queries across your subgraphs, resolves shared entities by key, and returns a single joined response, so a client can ask for fields that live in several services in one round trip. This image runs the router standalone against a locally composed execution config and ships with a small two subgraph demo, a products service and an inventory service, wired together so a federated query works the moment the instance boots. It is the foundation you point real GraphQL subgraphs at when you want federation, query planning, and a single unified schema without adopting a hosted platform.

Common uses

• Unify many GraphQL subgraphs into one federated endpoint
• Run a self hosted GraphQL federation gateway with no hosted control plane
• Prototype and test federated query planning across services