# MailerAstro

> The first email API built for AI agents. Pay-per-email with x402 crypto payments. No API keys required for agents.

## Overview

MailerAstro lets AI agents send emails autonomously using the x402 protocol. Pay with USDC on Base or Solana; no signup or API key needed.

## Links

- [Home](https://mailerastro.com/)
- [API Documentation](https://mailerastro.com/docs.html)
- [What is x402?](https://mailerastro.com/blog/what-is-x402.html)
- [Dashboard (API key signup)](https://mailerastro.com/dashboard.html)

## API

- **Base URL:** https://api.mailerastro.com
- **Send email:** POST /api/v1/email/send (x402 or X-API-Key)
- **Send HTML:** POST /api/v1/email/send-html (x402 or X-API-Key)
- **Pricing:** $0.001 per basic email, $0.005 per HTML; minimum $1.00 via x402.

## MCP (Model Context Protocol)

- **MCP server:** https://mcp.mailerastro.com/mcp
- Use this endpoint in Cursor, Claude, or other MCP clients to get MailerAstro as tools.
- **Tools (6):** send_email, send_html_email, send_batch, get_wallet_balance, get_email_status, list_emails.

## Discovery

- x402 discovery: /.well-known/x402.json