MCPJam Inspector
An open-source testing and evaluation platform for MCP servers, MCP apps and ChatGPT apps.
Sources and review
Checked against public documentation on . Suitability guidance is our editorial judgment; this is not a performance benchmark or an endorsement.
Server authors checking that their MCP server behaves the same in ChatGPT, Claude and Cursor.
About MCPJam Inspector
MCPJam lets MCP server developers test tools, prompts, resources and authorisation interactively across 16 client configurations and more than 170 models, with traces of every JSON-RPC message and OAuth exchange. It runs evals on test cases to catch cross-client differences and gate regressions in CI. It runs locally or as a hosted app; most code is Apache-2.0, while its evaluation services carry a separate licence.
MCPJam Inspector is an open-source project written primarily in TypeScript, with 2.2k stars on GitHub. It was last updated in September 2026.
npx @mcpjam/inspector@latestMCPJam Inspector vs. the alternatives
All 163 alternatives →| Record | Stars | Pricing | ||
|---|---|---|---|---|
| MCPJam Inspectorthis listing | 2.2k | TypeScript | — | Open source |
| MCP Reference Servers | 91k | TypeScript | MIT AND Apache-2.0 | Open source |
| context7 | 62k | TypeScript | MIT | Open source |
| chrome-devtools-mcp | 53k | TypeScript | Apache-2.0 | Open source |
| Playwright MCP | 37k | TypeScript | Apache-2.0 | Open source |
| github-mcp-server | 33k | Go | MIT | Open source |
