fastmcp

fastmcp is a cursor rule for Cursor from Meeting-BaaS/meeting-mcp. It costs 0 tokens per session (3,557 once invoked), scanned A, original, MIT.

A coding rule for testing an MCP server example through the command line and MCP Inspector, a tool for checking MCP servers interactively.

In plain words
What is it for?
Use it when adding or changing a FastMCP server example and you need to test its command-line and Inspector behavior.
Why use it?
It gives the agent a defined way to check that a newly added server example works through both testing methods.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

Good fit Use it when adding or changing a FastMCP server example and you need to test its command-line and Inspector behavior.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/meeting-baas/meeting-mcp/fastmcp
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/Meeting-BaaS/meeting-mcp

Made for: Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for fastmcp

README.md
[![agentmods](https://agentmods.dev/badge/rules/meeting-baas/meeting-mcp/fastmcp/github.svg)](https://agentmods.dev/rules/meeting-baas/meeting-mcp/fastmcp)
Your own site
<a href="https://agentmods.dev/rules/meeting-baas/meeting-mcp/fastmcp"><img src="https://agentmods.dev/badge/rules/meeting-baas/meeting-mcp/fastmcp/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for fastmcp

Your own site · 80×15
<a href="https://agentmods.dev/rules/meeting-baas/meeting-mcp/fastmcp"><img src="https://agentmods.dev/badge/rules/meeting-baas/meeting-mcp/fastmcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 3,557 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.03557
Opus 5 $0.00000 $0.01778
Sonnet 5 $0.00000 $0.00711
Haiku 4.5 $0.00000 $0.00356

Measured 10d ago against content hash b46aad215641, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

fastmcp scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cursor/rules/fastmcp.mdc · 679 lines

How it starts

The opening of the file, as written. The whole thing — 679 lines — stays where its author put it; the contents beside it link to each section on GitHub.

https://github.com/punkpeye/fastmcp

Skip to content Navigation Menu punkpeye fastmcp

Type / to search Code Issues 3 Pull requests Actions Security Insights Owner avatar fastmcp Public punkpeye/fastmcp Go to file t Name punkpeye punkpeye fix: gracefully handle failure to shutdown 754ff55 · last week .github/workflows fix: correct ci configuration 3 months ago src fix: gracefully handle failure to shutdown last week .gitignore release fastmcp 3 months ago LICENSE release fastmcp 3 months ago README.md fix: rename auth to session last week eslint.config.js release fastmcp 3 months ago jsr.json fix: limit included files 3 months ago package.json feat: support MCP client authentication last week pnpm-lock.yaml feat: support MCP client authentication last week tsconfig.json chore: lint using tsc 3 months ago vitest.config.js feat: allow to retrieve current list of clients 2 months ago Repository files navigation README MIT license FastMCP A TypeScript framework for building MCP servers capable of handling client sessions.

Note

For a Python implementation, see FastMCP.

Features Simple Tool, Resource, Prompt definition Authentication Sessions Image content Logging Error handling SSE CORS (enabled by default) Progress notifications Typed server events Prompt argument auto-completion Sampling Automated SSE pings Roots CLI for testing and debugging Installation npm install fastmcp Quickstart import { FastMCP } from "fastmcp"; import { z } from "zod";

const server = new FastMCP({ name: "My Server", version: "1.0.0", });

server.addTool({ name: "add", description: "Add two numbers", parameters: z.object({ a: z.number(), b: z.number(), }), execute: async (args) => { return String(args.a + args.b); }, });

server.start({ transportType: "stdio", }); That's it! You have a working MCP server.

You can test the server in terminal with:

git clone https://github.com/punkpeye/fastmcp.git cd fastmcp

npm install

Test the addition server example using CLI:

npx fastmcp dev src/examples/addition.ts

Read the full file on GitHub · 679 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 679 lines · 0 tokens per session scan A b46aad215641

Subscribe to this mod's changes

fastmcp is a cursor rule published in the GitHub repository Meeting-BaaS/meeting-mcp (30 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 3,557 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.