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The Langmail MCP server is a remote server at https://mcp.langmail.me/mcp, speaking the Streamable HTTP transport with OAuth authorization. Both Claude surfaces connect to it directly — nothing to install or run locally.

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Prerequisites

Add the server:
claude mcp add --transport http langmail https://mcp.langmail.me/mcp
Then authorize it. Inside a Claude Code session, run:
/mcp
Select langmail and follow the authentication prompt. Your browser opens for Google sign-in and a consent screen; approve it and return to the terminal.Verify:
claude mcp list
Output
langmail: https://mcp.langmail.me/mcp (HTTP) - ✓ Connected
Use /mcp at any time to inspect the connection, list the exposed tools, or re-run authentication.

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Test it

Ask Claude:
Prompt
Which emails in my Langmail inbox are flagged as to-dos?
Claude calls search_emails with { "keywords": ["todo"] } and answers from the result. If the call fails with an authorization error, re-run the authentication from /mcp (Claude Code) or the Connectors settings (Claude Desktop).

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Ending access

Removing the server from your client discards its tokens; without the refresh token, access lapses when the current access token expires: 
claude mcp remove langmail
In Claude Desktop, remove the connector from Settings → Connectors.

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Next steps

Search and triage email

Real prompts and the tool calls they produce.

Other MCP clients

Cursor and any client that speaks Streamable HTTP with OAuth.

How authorization works

What happens between “add server” and “connected”.

Tool reference

Exact parameters and output shapes for all 10 tools.