Pieter Post
Never lick a stamp again
166 followers
Never lick a stamp again
166 followers
Never lick a stamp again! Tired of stamps, envelopes, and post office trips? Pieter Post makes sending mail as easy as sending a text.
This is the 2nd launch from Pieter Post. View more
PieterPost MCP
Launched this week
PieterPost MCP connects AI agents to postal mail. From ChatGPT, Claude, Codex, Claude Code, or any MCP client, agents can prepare letters and postcards, use Mailbook contacts, upload attachments or postcard images, create checkout links, and track orders. It brings PieterPost online mail, API, and payment-link workflows into agent tools.
Free
Launch Team
Two things for me. First, the fully resolved postal address read back verbatim, plus which Mailbook entry it matched, since 'John in London' quietly resolving to the wrong saved contact is the failure I'd never catch. Second, an idempotency key on the send, so if the agent's tool call times out and retries I get one postcard and not two. Duplicate physical sends are the money version of a double-submit.
Pieter Post
@dipankar_sarkar Really appreciate this. Address readback and making sure retries do not create duplicate mail are exactly the kind of sharp edges we want to make boring. Thanks for trying it and writing this out, we will make this much better soon.
Uploaded a letter from my phone yesterday and it showed up at my mom's place two days later, tracking included. Genuinely didn't expect the whole process to feel that painless.
Pieter Post
@mihriban1580118 Love hearing this. That painless feeling is exactly what we are trying to get right: upload or write it, check it, and then it just shows up. What did you send her?
Finally tried Pieter Post for a birthday card to my grandma and it worked like a charm. The whole process took under a minute and the handwriting on the envelope actually looks legit.
Pieter Post
@atakank18468 This is the best kind of test. Grandma birthday cards are secretly the perfect use case. Very happy the envelope passed the vibe check too.
The postal-mail MCP angle is weirdly practical. I’d be curious how you handle confirmation before an agent sends anything physical — approval queue, spend cap, address validation? That boundary feels more important than the API itself.
The Mailbook integration seems really useful. Having contacts ready instead of entering addresses every time could save quite a bit of effort
Pieter Post
@nitesh_kumar98 Totally agree. Mailbook is one of those small things that makes repeat mail much less annoying. Save the address once, send again later without digging it up, and use reminders for things like birthdays or regular cards. What kind of contacts would you keep in there first?
Gotta say, the branding here is genuinely charming. That name "Pieter Post" with the classic envelope vibe really sells the whole concept before you even read what it does. Smart move leaning into the postal heritage while modernizing the actual experience.
Pieter Post
@dnd1112360 Thank you, this means a lot. We wanted it to feel like mail, not another cold tool. Pieter Post doing old-school postal work from the browser is basically the whole thing.
Loved how quick it was to send a letter from my phone, and the tracking kept me from worrying if it actually arrived.