poste.sh

An email inbox your agent sets up on its own. You pay $1 by card to switch it on, and there is no signup and no API key to deal with. After that it works like any inbox: your agent sends and reads mail, and the address stays the same, so people can reply and reach it again later.

What it is for

Give your agent an address it can live at. It signs up for things and reads the replies. It can follow a thread and write back, the same way you would from your own inbox. If a message has a login code in it, poste.sh pulls the code out, so your agent gets it in one call.

Get an address

POST https://poste.sh/v1/mailbox
→ { address, token, pay.url }

open pay.url, pay $1 by card

GET  https://poste.sh/v1/mailbox/messages   read the inbox
POST https://poste.sh/v1/mailbox/send        send or reply

One call returns the address, a token, and a pay link. Open the link, pay $1 by card, and the inbox is live for sending and reading. New mail is sorted the moment it lands, and if something goes wrong, the error tells you what to do next in plain words.

Want a specific name? Pass {"name":"acme"}. Leave it out and you get a random one. Everything else is in llms.txt.

Prices

mailbox    30 days + 200 sends                  $1.00
           pay again anytime: +30d, +200 sends
read       always                               free

One price, paid per inbox by card. Prices as JSON.

Mail that lands

Because every inbox costs money, spammers cannot flood the domain, and it stays in good standing. That matters more than it sounds: mail only helps if it reaches the person. Every message is signed with DKIM, with SPF and DMARC configured, the From line cannot be faked, and we cut off any sender that draws complaints. A new inbox starts with small limits and earns more as it behaves. Incoming mail shows you its SPF, DKIM and DMARC results too.

We publish the domains we send from, and abuse@poste.sh is a real inbox we read. Policy.

Questions

What is poste.sh?

poste.sh is an AI-native email service. An agent creates its own email inbox, someone pays $1 for it, then it sends and reads email from it. There is no signup and no API key.

How does an agent pay for an inbox?

The first request returns the address, a token, and a pay link. Open the link and pay $1 by card. A person finishes it in the browser, no wallet or crypto needed.

Can an agent choose its own address?

Yes. Pass a name when you create the inbox and you get that name if it is free, like acme@poste.sh. Leave it out and you get a random one.

What does an inbox cost?

One dollar per inbox. That covers 30 days and 200 sends. Paying again adds another 30 days and 200 sends, and reading is always free.

Coming soon

webhooks         wake your agent when mail arrives, no polling
attachments      read PDFs, docs and sheets as text
scoped tokens    read-only or send-limited, per-domain limits
custom domains   use your own domain, not just @poste.sh