MCPJam

OSS MCP testing, debugging, and evals platform

AI Agents / Agents · Apache-2.0 · 2.3k

Reviewed 2026-09-18 · last push 2026-10-19 · repo checked 2026-10-19

What's Good

Apache-2.0 core (MCPJam/inspector) with CLI/SDK/inspector packages (`@mcpjam/inspector`). Local and hosted (app.mcpjam.com) paths for tool inspection, cross-client behavior checks, and CI-shaped gates. Docs at docs.mcpjam.com. ★~2.2k — the productized MCP test harness beyond a one-off poke UI.

The Catch

Vs MCP Inspector (official MIT debugger): MCPJam is the broader test/eval platform with hosted gravity, not only the reference inspector. Some `/server/services` and evals paths are separately licensed proprietary portions — treat the free OSS inspector path as the bar, not every hosted feature.

Verdict

Apache-2.0 MCP test platform. Use for real-client MCP debugging/evals; watch the proprietary evals carve-out.

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