Zetteldesk

About

Zetteldesk is an MCP-based plugin that lets Claude, ChatGPT, Claude Code and other assistants send physical letters. The agent checks the PDF against DIN 5008, gets a price quote, and after the user confirms, Zetteldesk prints and posts the letter in Germany, with optional registered mail. It is prepaid with no subscription, from 1.12 euros per letter.