Why this repo matters
Latest release 9d ago, 10 developer signals, 3 package/install signals

The testing standard for MCP servers. Lint (14 rules), test, and fuzz over real stdio/SSE/HTTP transport. 18 assertion types in YAML. Found 4,794 schema issues across 55 servers. Any language, no mocks, single binary. (18 stars, 1 forks, Go, fresh release, 4 AI signals, 6 developer signals). Latest release: v0.12.3.