# Sickle (sickle.app)

Native macOS mail client that puts Gmail, Outlook, iCloud, Fastmail and IMAP accounts in one window, with an MCP server for agents.

- Atlas card: https://inite.ai/en/atlas/sickle.app
- Site: https://sickle.app
- For: Mac users with several email accounts who want an AI agent to work their inbox
- Categories: sales
- Use 0/100 · alive 100/100

## Used for

- find threads waiting on your reply across accounts
- archive newsletters through an AI agent
- view all mailboxes side by side in one window

## Price

- from 2.5 USD/month, no free plan (read 2026-10-27 on https://sickle.app/pricing)

## For developers

- MCP server: app.sickle/mail (namespace; auth on 2026-10-27)
- Status page: https://status.sickle.app
- Read 2026-10-27

## MCP server, measured daily

Server: https://mcp.sickle.app, checked every day since 2026-10-27 (7 checks).

- Answered: 100% of daily checks
- Median first answer: 631 ms
- Sign-in: OAuth (the client signs the user in)
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Training on your data: no (https://sickle.app/privacy-policy)
- Read 2026-10-27

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Source: INITE Atlas, https://inite.ai/en/atlas/sickle.app. JSON: https://inite.ai/api/atlas/sickle.app. MCP: https://inite.ai/api/mcp (atlas_lookup).