Contact
Most things have a faster path than email. Try those first.
Wire it into your agent
Copy-paste MCP config for Claude Code, Claude Desktop, Cursor, Codex, and OpenAI Agents SDK.
Read the docs
Tool schemas, worked examples, pricing, and HTTP fallback in one file.
OpenAPI spec
Machine-readable API description if you're integrating without MCP.
GitHub
Examples, client libraries, and issue tracker.
Still want a human?
Sales, partnerships, security disclosure, press — we read every email.
Reporting a security problem
Email hello@mailsnail.dev with “Security” in the subject line. Tell us what you found, where, and how to reproduce it. If the problem exposes someone's letter, address or payment details, describe it without sending us the data itself.
We read every report and investigate it. When you test, use your own account and your own addresses, and please give us the chance to fix a problem before you describe it in public.