MCPJam

Test, debug, and evaluate MCP servers with MCPJam. OAuth flow testing, LLM-powered evals, and CI/CD integration — open-source and runs locally.

Highlights from the product’s site

• See the same prompt land in multiple clients
• Test the journeys your users actually take
• Then invite real people to try the same ones
• Set the quality bar across every AI client
• Block the ones that fail before they merge

Open source: the code is at github.com/MCPJam/inspector.

First shown on Hacker News on 17 September 2026 as “MCPJam - the first testing & evaluations platform for MCP servers”, where it reached 13 points and 9 comments. Read the discussion.