> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sendmypaper.com/llms.txt
> Use this file to discover all available pages before exploring further.

# What is Sendpaper?

> Physical mail for AI agents. Ask your agent to send a postcard or letter, approve it, and Sendpaper prints and mails it.

Sendpaper lets an AI agent send **real postcards and letters** to US addresses. You ask in a sentence: *"mail my mom a birthday postcard"*. Your agent writes it, shows you exactly what will print, pays with your approval, and Sendpaper prints it and hands it to USPS First-Class, usually within one business day.

It works with **Codex, Muse, Claude, ChatGPT, Cursor, VS Code** and anything that speaks [MCP](https://modelcontextprotocol.io) or plain HTTP.

## Who it's for

<CardGroup cols={3}>
  <Card title="People with an AI agent" icon="user">You use Codex, Muse or Claude and want it to handle the occasional real-world errand: birthdays, thank-you notes, a letter to the landlord.</Card>
  <Card title="Developers building agents" icon="code">You want your agent or app to send physical mail without signing up for a print vendor, managing API keys or storing cards.</Card>
  <Card title="Small businesses" icon="store">You want to send thank-you cards to customers or a note to a client, written by your assistant.</Card>
</CardGroup>

## How it works

<Steps>
  <Step title="Connect once">Add the Sendpaper MCP server to your agent. It takes one command and no sign-up. [Quickstart →](/quickstart)</Step>
  <Step title="Ask">"Send a thank-you postcard to…" Your agent confirms the address and wording with you.</Step>
  <Step title="Approve and pay">Your agent shows the exact print preview. It can [pay for you with a one-time Stripe token](/guides/agent-payments) you approve, or you pay a regular checkout link.</Step>
  <Step title="We mail it">A person reviews every piece, prints it and mails it via USPS First-Class. Delivery usually takes 3–5 business days.</Step>
</Steps>

## Start here

<CardGroup cols={2}>
  <Card title="Quickstart" icon="rocket" href="/quickstart">Connect your agent and send your first postcard in two minutes.</Card>
  <Card title="Let your agent pay" icon="credit-card" href="/guides/agent-payments">One-time, amount-capped payments you approve. No card numbers shared.</Card>
  <Card title="Use cases" icon="mail" href="/guides/use-cases">Birthdays, thank-yous, tax and lease letters, and prompts to copy.</Card>
  <Card title="API reference" icon="braces" href="/api/introduction">Create, pay and track orders over HTTP.</Card>
</CardGroup>

## Prices

| Product | Size | Price |
| - | - | - |
| Postcard | 4 × 6 in | \$2.99 |
| Postcard | 6 × 9 in | \$3.99 |
| Letter (up to 3 pages, #10 envelope) | 8.5 × 11 in | \$4.99 |

Printing, envelope and First-Class postage are included. US addresses only. No subscription.


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.