# MCP

Hundreds of MCP Servers and Claude Skills, and Barely Any Are Truly Free and Open Source. I Checked Them One by One and Turned It Into a Directory

I wanted to add a few MCP servers to Claude, and the more I searched the more annoyed I got. Out of hundreds, half are only free if you hand over an API key. A whole batch flies the open-source flag but really means source-available, not for commercial use — Sentry's MCP is under the FSL license, and Anthropic's own document skills flatly say all rights reserved. Some repos don't even have a LICENSE file, which legally means all rights reserved by default. The ones that are actually MIT or Apache, install-and-go, no account needed, you can only tell apart by opening every LICENSE one by one. I went through sixty-odd of them and collected the genuinely free and open ones into a bilingual directory: To Be Free. This piece is about how I sorted them, which of the truly free ones are worth installing first (gstack, ruflo, the official MIT servers…), and why this is the next step in my rebuild-free-software line.