MCP server

Sickle — every mailbox for your agent Official

app.sickle/mail

Checked 26 Oct 2026, 08:29 UTC · It answered and asked for a sign-in

Gmail, Outlook, iCloud, Fastmail and any IMAP mailbox for your agent. Scoped OAuth, approved sends.

Signs in with your accountVerified publisher: sickle.app

https://mcp.sickle.app

At a glance

Type: MCP server
Publisher: sickle.app (verified by the MCP Registry)
Status: Signs in with your account
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http mail https://mcp.sickle.app

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.mail]
url = "https://mcp.sickle.app"

Gemini CLI

{"mcpServers":{"mail":{"httpUrl":"https://mcp.sickle.app"}}}

Cursor

{"mcpServers":{"mail":{"url":"https://mcp.sickle.app"}}}

VS Code

{"servers":{"mail":{"type":"http","url":"https://mcp.sickle.app"}}}

Antigravity

agy mcp add mail https://mcp.sickle.app

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"mail","server_url":"https://mcp.sickle.app","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"mail","server_url":"https://mcp.sickle.app"}

Signs in with your account: your agent app opens a sign-in page the first time you use it.

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