Open source alternatives to MCP Inspector

One project on starwire does the same job. Ranked by how much of what MCP Inspector does each one covers, read from its README and website. Ties go to the most active.

What MCP Inspector does

Connect to an MCP servercore
List and call tools with test inputscore
Browse resources and prompts
Inspect raw protocol messages
Test auth and transports

Each dot in the table is one job, in this order. Square dots are core jobs and count double. Full means yes, half means partly. "See the evidence" under a project shows the line behind each one. Coverage is what a project documents, not how well it works or how hard it is to move to. How we score this

Project	Covers	Stars	Commits, 12 weeks	Last release	Closed vs opened	Setup	License
inspectorWeb app to chat with, test and debug MCP servers and ChatGPT apps	Replaces it100%	2.3k+14	2,331	2 days ago	78%	Hosted version	Custom license
Covers everything on the checklist.See the evidence Connect to an MCP servercoreYesrun MCPJam locally for HTTP/S and local STDIO servers List and call tools with test inputscoreYesManually run tools, resources, templates, prompts, and elicitation flows Browse resources and promptsYesExplore your server's tools, resources, and prompts in one place. Inspect raw protocol messagesYesfull visibility & traces on every JSON-RPC message Test auth and transportsYesVisualize your OAuth & EMA requests step-by-step

Vital signs from GitHub, checked weekly. How we read these · How setup is read

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