Mu runs 67 real tools behind one MCP endpoint

Mu puts 67 tools, from mail to a wallet, behind one MCP endpoint, per its GitHub repo. Every one of those tools is also a CLI subcommand. That means builders trade a pile of separate API keys and vendor subscriptions for one binary. They can self-host it or run the hosted version at micro.mu. Wiring several services into one agent usually means a subscription and a credential for each one. Mu collapses that into one login and one bill.

What's different is what's underneath. mail_inbox reads a real SMTP mailbox with DKIM signing. web_search queries a search index Mu maintains itself, and db_create writes to actual storage. Mu runs these services itself instead of proxying them from third parties.

The full catalog also covers news, markets, weather, maps, storage, publishing, and a wallet, all built in AGPL-3.0 Go. At 247 stars and more than 4,000 commits, it reads like a maintained project rather than a weekend demo.