Indie hacker building email applications

Nikita Patskov • Peerlist

Sickle is a native Mac mail client for every account you own: Gmail, Outlook, iCloud, Fastmail, Yahoo and any IMAP server, in one window, each in its own colour. It has keyboard navigation and an email cleaner that finds every mailing list you never open.It also runs a remote MCP server, so Claude, Cursor, Codex or any MCP client can work across all of those mailboxes 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 replies, and send when you ask.You stay in control:<ul><li>Each tool has its own permission in your AI app.</li><li>Sending asks before every email.</li><li>Nothing is ever deleted for good.</li><li>Sickle keeps no copy of your mail.</li></ul>The connector works from any OS, so no Mac is needed for the agent side. The Mac app needs macOS 27 or later.£8.99/month after a 7-day free trial, or £30/year. One subscription covers the app and the connector.Launch offer: the first 100 people get their first paid month free. Grab a code at sickle.app/claim.