Show HN: MCPJam - the first testing & evaluations platform for MCP servers

Category: devtools

Tags: mcp, testing, evaluation, oauth, cli, typescript, ai-tooling

Score: 7.3/10 (Innovation: 7, Technical: 7, Documentation: 8, Utility: 7)

MCPJam is an open-source testing and evaluation platform for MCP (Model Context Protocol) server developers, offering cross-client testing across 16 client configurations and 170+ LLMs, OAuth conformance debugging, evals, CLI, and CI/CD integration. It addresses the emerging pain point that ChatGPT, Claude, and Cursor all interpret MCP servers differently, providing observability and regression gating that no mainstream tool offered before.

Target audience: backend devs, AI/LLM engineers, MCP server developers, devops

Repository: https://www.mcpjam.com · TypeScript · NOASSERTION · 2210 stars

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