Zetteldesk – An MCP server that prints and mails letters
Lets your AI agent compose and mail a real letter — printed, stamped, tracked — from €1.12
Zetteldesk is an MCP server that lets Claude, ChatGPT or other agents validate a PDF against DIN 5008, get an exact price quote, then have it printed, enveloped and posted from Germany — with registered mail and proof of delivery if you choose. Nine tools separate free checks (validate_letter, get_quote, get_balance) from ones that spend money (send_letter) or ask confirmation first (cancel_letter), so a client only interrupts you when it matters. Pricing starts at €1.12 per letter, prepaid from a balance, with no subscription and a refund if a letter is rejected.
What holds up
- +Nine tools are marked read-only, balance-spending or confirm-first, so money never moves silently
- +Checks DIN 5008 format and gives an exact price quote before anything is charged
- +No subscription — prepaid balance starting at €10, pay €1.12 and up per letter
- +Hosted in Germany with registered mail and proof-of-delivery options
Mind the limits
- −cancel_letter only works in the brief window before printing starts — once handed over, it can't be recalled
- −Requires a prepaid balance top-up before first use — no pay-per-letter without funding beforehand
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