MCP connectors
FastMCP
Turn ordinary Python functions into tools an AI can call
★ 28k
September 2026
Apache-2.0
MCP connectors
What we checked ourselves
Not copied from the project's own blurb. These are things we opened and verified, with the date.
- 23 Aug 2026We checked that the link to the project still resolves.
- 14 Aug 2026We read the licence text itself (LICENSE). No unusual restrictions were stated.
- 30 Aug 2026We read the project's own documentation and found no sign that development has stopped.
Where this sits among the 47 tools we list in MCP connectors
- No API key required28 of 47
- Keeps your data on your own machine17 of 47
- Commercial use confirmed as allowed45 of 47
- Requires terminal commands3 that do not →
Only 16 of the 47 meet all of the conditions above.
Counted from our own checks: every tool we list is examined against the same criteria.
What it does
A full MCP application framework — servers, clients and interactive apps — where exposing capability is a decorator over a normal function, and the framework absorbs the protocol, auth and deployment work that makes hand-rolled MCP servers tedious. The natural use is giving a model access to systems it otherwise has no idea about: your database, your internal service. Remember the model decides when to call these, so start read-only or gate anything destructive behind confirmation. Apache-2.0.
Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.
Screenshots & visuals
Before you start
- Setup difficultyEasy to start
- Command lineRequired
- API keyNot required
- Sends data onlineNo
Judged automatically from the project's own metadata. Always confirm on the official page.
FastMCP FAQ
- Is FastMCP free?
- Yes. It runs on your own machine, so there is no usage-based cost either.
- Do I need to install anything or write code to use FastMCP?
- This is a library meant to be used from code. It is not a standalone app.
- Does FastMCP work on a phone?
- No. It needs a computer.
- Can I use FastMCP commercially?
- The licence is Apache-2.0, which permits commercial use. Conditions such as keeping the copyright notice still apply, so read the licence text before shipping it inside something.
How it compares
The conditions that decide whether you can actually use it, side by side.
| Tool | Command line | API key | Sends data out | Phone | Commercial use |
|---|---|---|---|---|---|
| FastMCP (this page) | Required | Not needed | No | No | Yes |
| MCP Servers | Required | Not needed | Yes | No | Yes |
| Context7 | Required | Not needed | Yes | No | Yes |
| Chrome DevTools MCP | Required | Not needed | Yes | No | Yes |
"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.