PieterPost MCP Server

by pieterpost-com Your server? Claim it

answering

PieterPost MCP is answering right now. Last checked 3 min ago. Last commit 21 Sep 2026.

Let AI agents prepare, review, pay for, and send real letters and postcards.

Uptime history 11 hours of history

11 hours agonow

100.0%

Uptime 24h

40 of 40 checks

—

Tools

hidden behind auth

137 ms

Response time

average over 24h

Stars

last commit 21 Sep 2026

Nothing serious here today

Today is the operative word: we check PieterPost MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add pieterpost-mcp --transport http https://pieterpost.com/mcp/setup/

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "pieterpost-mcp": {
      "url": "https://pieterpost.com/mcp/setup/"
    }
  }
}

~/.codex/config.toml

[mcp_servers.pieterpost-mcp]
url = "https://pieterpost.com/mcp/setup/"

.cursor/mcp.json

{
  "mcpServers": {
    "pieterpost-mcp": {
      "url": "https://pieterpost.com/mcp/setup/"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "pieterpost-mcp": {
      "url": "https://pieterpost.com/mcp/setup/"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, and it signs you in through your browser: there is no API key to paste.

Endpoints

URL	Transport	State	Latency	Checked
https://pieterpost.com/mcp/setup/	streamable-http	sign-in	130 ms	3 min ago

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PieterPost MCP — questions

Answers built from our own checks of this server.

Why is there no tool list for PieterPost MCP?

The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 100.0% of checks in the last 24 hours got a reply.

Is PieterPost MCP working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 40 of 40 checks got a reply (100.0%), average response time 137 ms. The bar chart above shows every period we have measured.

How do I connect PieterPost 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. You sign in through your browser once and the client keeps the session: no key to copy, and it refuses anonymous clients.

How do you sign in to PieterPost MCP?

No API key is involved. PieterPost MCP answers our knock with an OAuth challenge, so you authorise it once in your browser and the client keeps the session. That is also why we see no tool list: it will not describe itself to an anonymous client, and that is the server working as intended, not a fault.

How fast is PieterPost MCP?

It answers our handshake in 137 ms on average, which is faster than 80% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is PieterPost MCP open source?

We cannot say either way: 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.