mcpbeat

Fetter MCP Server

io.github.fetter-io/fetter-mcp
answering

Fetter MCP is answering right now. Last checked 6 min ago. It exposes 3 tools. Last commit 27 Feb 2026.

Real-time Python package and vulnerability data for AI coding agents.

Uptime history 40 hours of history
40 hours agonow
100.0%
Uptime 24h
91 of 91 checks
3
Tools
read from the server
429 ms
Response time
average over 24h
1
Stars
last commit 27 Feb 2026

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.

run in your terminal
claude mcp add fetter-mcp --transport http https://mcp.fetter.io/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "fetter-mcp": {
      "url": "https://mcp.fetter.io/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.fetter-mcp]
url = "https://mcp.fetter.io/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "fetter-mcp": {
      "url": "https://mcp.fetter.io/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "fetter-mcp": {
      "url": "https://mcp.fetter.io/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

lookup
lookup
Look up a package by name and (optionally) version number to find which versions are available and/or have vulnerabilities.
most
most_recent_not_vulnerable
Find the most recent version of a package that has no known vulnerabilities.
vulnerable
is_vulnerable
Check if a specific package version has known vulnerabilities. Requires an exact version specifier (e.g., 'requests==2.31.0').

Endpoints

URLTransportStateLatencyChecked
https://mcp.fetter.io/mcp streamable-http answering 437 ms 6 min ago

Fetter MCP — questions

Answers built from our own checks of this server.

What can Fetter MCP do?
It exposes 3 tools, read directly from the server on our last check. Among them: is_vulnerable, lookup, most_recent_not_vulnerable. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Fetter MCP working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 429 ms. The bar chart above shows every period we have measured.
How do I connect Fetter MCP?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Fetter MCP need an API key?
No. Fetter MCP completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Fetter MCP?
It answers our handshake in 429 ms on average, which is faster than 29% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Fetter MCP open source?
Yes — written in Rust and 1 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.