MCPJam
MCP Server Testing and Evaluation Platform
Introduction
MCPJam is an open-source development tool designed for testing, debugging, and evaluating MCP servers. It can be run locally. The biggest problem faced by those who work with MCP servers is that something that works perfectly on their own systems fails to function correctly when used within users' ChatGPT or Claude environments. MCPJam is precisely designed to address this issue.
The main features include: the Inspector local debugger, which allows you to examine each individual tool call in detail; the OAuth debugger, which helps identify exactly where the authentication process is getting stuck; cross-client testing, which enables you to see how different AI clients actually interact with your server; and the ability to use large models for automated evaluations, integrating these processes into CI/CD pipelines to check model behavior with every code submission.
It offers various usage options via command line, SDK, as well as web/desktop interfaces. Individual developers can use it for free. According to official statistics, over 100,000 developers are currently using this tool, making it ideal for teams involved in MCP integration and the development of AI Agent toolchains.
Visits：18
Updated：2026-11-07
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