Sickle now runs a remote MCP server, so Claude, Cursor, Codex or any MCP client can work across every mailbox you have at once. Ask "what needs a reply this morning?" and your agent reads every inbox and puts the urgent ones first. It can search, tidy, draft and send. Each tool has its own permission in your AI app, sending asks before every email, nothing is deleted for good, and Sickle keeps no copy of your mail. Works from any OS.

Meet native macOS email client that supports all email providers. It simplifies reaching inbox zero with its Mailbox Cleaner feature. It offers one-click solution for confirmation codes and links, keyboard-first navigation, custom themes.