Hazumi News | Show HN: MailCat – Email service for AI agents (open-source)

Hi HN,

I built MailCat because my AI agents kept getting stuck at "please verify your email."

The key insight: if your AI agent can read documentation, it can set itself up.

Just paste this into Claude Code, OpenClaw, or any AI agent:

    "Read https://mailcat.ai/skill.md and set up a MailCat mailbox for yourself. Save the token securely."

That's it. Your agent reads the skill.md, creates a mailbox via API, and handles email verification autonomously from there.

What it does: - Instant mailbox creation via API - Verification codes auto-extracted from emails - 1-hour retention (perfect for verification flows) - Fully open source (MIT) and self-hostable

Built with Cloudflare Workers + D1 + KV. Self-host in ~10 minutes.

GitHub: https://github.com/apidog/mailcat

Happy to answer questions about the architecture.

Summary

MailCat is an open-source email client that provides a modern and customizable interface for managing email accounts. It supports multiple email providers, including Gmail, Outlook, and more, and offers features like unified inbox, message filtering, and calendar integration.

Story

Show HN: MailCat – Email service for AI agents (open-source)