MailerAstro — Email API for AI Agents

# 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