gbrain gbrain Tools
Connect an account once. Every terminal and every assistant reaches it under one permission, and changing what a tool may do reaches all of them at their next call.
Connect an account once. Every terminal and every assistant reaches it under one permission.
Gmail
Calendar
A permission is a named policy, not a copy of a key. Any number of clients hook up to the same one. Moving Gmail from Read to Manage reaches every client on that permission at its next call, with nothing to restart and nothing to sign in to again.
The same holds in the other direction. Switching a client off stops its calls at once, and revoking it keeps the history as a record.
The permission, the ceiling and the record are the same objects either way. The only thing that changes is what does the asking.
gbrainio tool gmail search --unread
One line installs gbrainio. Search a mailbox, file a receipt, draft a reply, without leaving the terminal.
Read the walkthrough
claude mcp add gbrain https://gbrain.io/mcp
Point Claude Code, Cursor or Codex at one endpoint. Each sees only what its permission allows.
Set it up
This is gbrain Tools: one toolbox, reached from a terminal or over MCP, under one permission.