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FastMCP

★ 27k

Pythonic framework for building MCP servers and clients that plug tools into Claude and other agents

FastMCP does the job of Zapier and custom API glue, self-hosted. It is Apache-2.0-licensed, so you can do essentially what you like with it, and it installs in about one command. Zapier bills $20-50 for it. 27k stars on GitHub.

Open-source replacement for Zapier, custom API glue.

Licence
Apache-2.0
Self-hosting
Easy
The paid one costs
$20-50
GitHub stars
27k
view the code →official site →

Is it actually a replacement?

We have written a verdict on what it replaces — what you lose, and why people still pay:

FastMCP questions

Is FastMCP open source?

Yes — it is released under Apache-2.0.

Can FastMCP replace Zapier?

Our verdict on Zapier is YES. n8n (130k stars), MCP Servers (89k stars), Activepieces Community Edition (24k stars) are mature open-source replacements for Zapier — self-host in one command and stop paying $29.99/mo.

Can I self-host FastMCP?

Yes — we rate it easy to self-host.

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