sift

Sift Privacy Policy

Last updated: October 29, 2026

Sift is a personal tool that labels Gmail on a server its owner runs. This policy describes what it does with data from your Google account.

Google data Sift uses

With your permission, Sift uses these Google API scopes:

• gmail.readonly and gmail.compose, to read new messages through Google’s Gmail MCP server.
• gmail.modify, to apply labels to messages and to receive notifications when your inbox changes.
• pubsub, to receive those notifications from a Google Cloud Pub/Sub subscription in your own Google Cloud project.

Sift reads the senders, subjects, and contents of new messages in order to choose a label for each one. It does not send, delete, or forward mail.

Where your data goes

• Your server. Sift runs on a host you control. Your OAuth refresh token and other credentials are stored there, in files only your user account can read.
• Anthropic. Sift uses Claude Code to decide each label, so the content of the messages it labels is sent to Anthropic’s API for processing, under Anthropic’s privacy policy.
• Your GitHub repository. Sift keeps its rubric and a state file, which can include sender addresses, message thread IDs, and notes about how you handled them, in a private GitHub repository you own.

Sift does not send your data to the developer or to anyone else. It does not use analytics, tracking, or advertising, and it does not sell or share your data.

Removing your data

To stop Sift, stop its service on your server and remove its access to your Google account at myaccount.google.com/permissions. To remove its files, delete them from your server and from your GitHub repository.

Contact

Questions about this policy can go to the developer on GitHub at github.com/dcwalker.