# MCPJam Inspector shipped an update > Source: > Published: 2026-09-23 08:20:07+00:00 # 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@latest ``` **Make your product part of the discovery.** Explore advertising ## MCPJam Inspector vs. the alternatives [All 163 alternatives →](https://agentsearchengine.app/alternatives/mcpjam-inspector) | Record | Stars | Pricing | | | |---|---|---|---|---| | MCPJam Inspectorthis listing | 2.2k | TypeScript | — | Open source | | [MCP Reference Servers](https://agentsearchengine.app/agents/mcp-reference-servers) | 91k | TypeScript | MIT AND Apache-2.0 | Open source | | [context7](https://agentsearchengine.app/agents/context7) | 62k | TypeScript | MIT | Open source | | [chrome-devtools-mcp](https://agentsearchengine.app/agents/chrome-devtools-mcp) | 53k | TypeScript | Apache-2.0 | Open source | | [Playwright MCP](https://agentsearchengine.app/agents/playwright-mcp) | 37k | TypeScript | Apache-2.0 | Open source | | [github-mcp-server](https://agentsearchengine.app/agents/github-mcp-server) | 33k | Go | MIT | Open source |