Relay Capital Chrome Web Store

Chrome extension

Gmail Message ID and Thread ID Copier

Copy Gmail message IDs, thread IDs, RFC Message-ID headers, and stable Gmail locators for AI prompts, support tickets, CRM notes, diligence files, and source-backed work.

Add to Chrome Message-ID guide
Gmail Message ID and Thread ID Copier preview inside Gmail

Direct answer

Use it when the exact Gmail source matters.

The extension adds small ID buttons inside Gmail so a user can copy a stable locator for an exact email or a full conversation without inspecting Gmail source manually.

  • Copy exact-email locators from Gmail message rows and open conversations.
  • Copy Gmail thread IDs for full conversation context.
  • Use RFC Message-ID and rfc822msgid locators when Gmail exposes exact source headers.
  • Keep all processing local in the user's browser and active Gmail session.

Locator formats

Copy raw handles that tools and AI assistants can route back to Gmail.

Supported locator prefixes include rfc822msgid:, gmail-message-id:, gmail-thread-id:, and gmail-thread-url:. The copied value stays a single line so it can be pasted into prompts, tickets, CRM notes, or evidence ledgers.

Gmail list view with message ID buttons

FAQ

What does Gmail Message ID & Thread ID Copier copy?

It can copy rfc822msgid, gmail-message-id, gmail-thread-id, and gmail-thread-url locators depending on what Gmail exposes for the selected message or thread.

Why would I need a Gmail Message-ID?

A stable Gmail locator lets an AI assistant, support team, CRM note, or source ledger point back to the exact email instead of relying on vague search terms.

Does the extension collect Gmail data?

No. Gmail metadata is handled locally for the click-to-copy action and is not sent to Relay Capital.