0n3
MCP servers · Gmail · connector

Connect Claude (desktop & claude.ai) to Gmail

One line gives Claude (desktop & claude.ai) your Gmail account as tools: 13 endpoints, messages, drafts, labels, called with your own connection. No key in the prompt, a receipt for every call, revoke Claude (desktop & claude.ai)'s access alone any time.

Get the line for Claude (desktop & claude.ai)Connect Gmail first

Three steps

  1. Create a free 0n3 account and connect Gmail. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into Claude (desktop & claude.ai). Add 0n3 as a custom connector; sign in once through the 0n door.
  3. Ask Claude (desktop & claude.ai): whoami. Then: "List messages in Gmail".
Claude desktop app and claude.ai
  1. Settings → Connectors → Add custom connector
  2. Name: 0n3 · URL: https://0n3.app/mcp
  3. Click Connect and sign in with your 0n account (email + password, or paste your 0n token)
  4. Turn the connector on in a chat and ask: "whoami"

This is the OAuth door: no token to paste, revoke it any time from 0n3 → Tokens.

The line above carries a placeholder; 0n3.app/install mints a real key named for Claude (desktop & claude.ai) and fills it in.

What Claude (desktop & claude.ai) can then do in Gmail

Messages · Read, search, and manage messages5
List messagesGET /users/me/messages
Get a messageGET /users/me/messages/{messageId}
Send a messagePOST /users/me/messages/send
Trash messagePOST /users/me/messages/{messageId}/trash
Untrash messagePOST /users/me/messages/{messageId}/untrash
Drafts · Create and manage drafts3
Create a draftPOST /users/me/drafts
List draftsGET /users/me/drafts
Send a draftPOST /users/me/drafts/send
Labels · Organize with labels2
List labelsGET /users/me/labels
Create a labelPOST /users/me/labels
Threads · View conversation threads2
List threadsGET /users/me/threads
Get a threadGET /users/me/threads/{threadId}
Send email · Send emails0
Send emails
More · Everything else this app exposes.1
Get a profileGET /users/me/profile

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