MCPJam Inspector
Hi HN, I'm Matt, founder of MCPJam. We're building open source dev tools for MCP server builders. There’s been a lot of debate around skills vs MCP. From what I see, there’s a growing trend of people using skills paired with MCP servers. Skills teach the agent how to use the MCP server tools and guide the agent to completing complex workflows. We’re also seeing Anthropic encourage the use of Skills + MCP in their products. Anthropic recently launched the connectors marketplace. A good example of this is the Figma connector + skills. The Figma skill teaches the agent how to use the Figma MCP…
MCPJam Inspector launched on January 20, 2026 with 141 votes, #222 of 14,585 launches that month and more than 95% of that year's launches.
What it does
MCPJam inspector is the local testing tool for ChatGPT apps and MCP servers. Build your apps locally with MCPJam's widget emulator and test against any LLM in the playground. Inspect your MCP server’s tools, resources, prompts, and OAuth flows. No more ngrok or ChatGPT subscription needed.
Test, debug, and evaluate MCP servers with MCPJam. OAuth flow testing, LLM-powered evals, and CI/CD integration — open-source and runs locally.
From your first prompt to a continuous gate on every release, MCPJam shows what breaks across every AI client, and how to fix it. Know exactly which MCP capabilities work in every major client. Make reliability evals, security, and protocol compliance required checks in your own pipeline. Your build ships when it clears the bar you set. Every run makes the next one stronger. Share with human QA or agent personas, watch multi-turn journeys flow from goal to sentiment, then turn clustered failures into ranked fixes before you ship. assistant get_order create_refund { order_id: 4821, amount: 129.00 } Bright Data made MCPJam the official evaluation CLI for Web MCP, catching regressions before…from mcpjam.com
In the maker’s words, at launch
Hi HN, I'm Matt, founder of MCPJam. We're building open source dev tools for MCP server builders. There’s been a lot of debate around skills vs MCP. From what I see, there’s a growing trend of people using skills paired with MCP servers. Skills teach the agent how to use the MCP server tools and guide the agent to…
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