fastmcp: The fast, Pythonic way to build MCP servers and clients

by PrefectHQ · MCP Server · ★ 28.3k

Last updated: · Indexed by AgentSkillsHub · Auto-synced every 8h

How to install fastmcp

uv pip install fastmcp

Taken from the project's README on GitHub. Check the security audit before running it.

Security audit verdict: SAFE · quality 67/100

None of the 42 rules matched — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

agentsfastmcpllmsmcpmcp-clientsmcp-serversmcp-toolsmodel-context-protocolpython

Quick Facts

Stars28,335
Forks2,563
LanguagePython
CategoryMCP Server
LicenseApache-2.0
Quality Score67/100
Open Issues459
Last Updated2026-11-07
Created2024-11-30
Platformsmcp, python
Est. Tokens~14k

About fastmcp

FastMCP 🚀 Move fast and make things. Made with 💙 by Prefect <img src="https://trendshift.io/api/badge/repositories/13266" alt="prefecthq%2Ffastmcp | Trendshift" style="width: 250px; height: 55px;" width="250" height="55"/

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

View on GitHub → Browse MCP Server tools