MCPJam Inspector – Local testing and development for ChatGPT and MCP apps

Summary: MCPJam Inspector enables local development and testing of ChatGPT apps and MCP servers without requiring a ChatGPT subscription or ngrok. It provides a widget emulator, an LLM playground, and OAuth debugging tools to inspect and test app components and authorization flows.

What it does

It emulates ChatGPT and MCP apps locally, allowing developers to test against any LLM in a playground environment. It also inspects MCP server tools, resources, prompts, and OAuth flows.

Who it's for

Developers building ChatGPT apps, MCP apps, or MCP servers who need local testing and debugging tools.

Why it matters

It removes the need for remote tunneling and ChatGPT subscriptions, improving the development experience by enabling real-time local testing and inspection.