mu Review 2026: One MCP Endpoint, 83 Real Tools for Your Agents
mu is a single MCP endpoint from micro that hands an agent 83 real-world tools — news, search, mail, markets, weather, storage — through one connection. We review how it works and its licensing trade-offs.
Wiring an agent up to the real world usually means spinning up a separate MCP server for search, another for mail, another for storage. mu collapses that into one endpoint: connect once, and your agent gets 83 real tools.
What is mu?
mu is a single MCP endpoint that gives an agent 83 real-world tools — news, web search, mail, markets, weather, video, and storage — through one connection and one set of credentials. Crucially, it doesn’t just proxy: it runs the mail server, feed aggregator, search index, and sandbox itself. You can point your agent at micro.mu’s hosted endpoint, or self-host the one Go binary and monetize your instance by charging for tool calls. It works with Claude Code, Cursor, GitHub Copilot, and any MCP client.
Key features
- One MCP endpoint, 83 tools — news, search, mail, markets, weather, and storage in a single connection.
- Single credential set — no more wiring a server per capability.
- Self-run services — mail server, search index, and sandbox run locally, not proxied.
- Broad client support — Cursor, Claude Desktop, and any MCP-compatible client.
- Self-host or hosted — one Go binary to run yourself, or micro.mu’s managed endpoint.
Who should use it?
mu suits agent builders who are tired of orchestrating a fleet of MCP servers and want one dependable real-world toolkit. Self-hosting is attractive if you want to own the infrastructure — or even resell access. If you only need one or two capabilities, a dedicated lightweight server may be simpler.
Pros and cons
Pros: drastic reduction in MCP wiring, self-hosted with real services, works across major agents.
Cons: AGPL-3.0 license (a fit concern for some commercial use); the hosted endpoint runs on credits; young project with wide-but-shallow tool depth.
Pricing
Free to self-host under AGPL-3.0. The hosted endpoint at micro.mu runs on credits, with some calls priced per use.
FAQ
Is mu open source? The self-hosted binary is AGPL-3.0. Note the copyleft license if you plan to embed it commercially.
Do I need an account? The hosted endpoint needs a micro.mu account and runs on credits; self-hosting avoids that.
Which agents work with it? Any MCP client — Claude Code, Cursor, Claude Desktop, and more.
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