MCP server for adding inline, range-anchored comments to Google Docs — the one comment operation the Google Docs & Drive APIs can't do. For AI agents (Claude, Cursor, Copilot) that review documents.
Inline, range-anchored comments for Google Docs — the one comment operation the Google APIs can't do.
Quickstart · Scope · Tools · Configuration · How it works · Troubleshooting · Server deployment · FAQ
You're building an AI process around Google Docs — an agent that reviews drafts, audits contracts, gives editorial feedback. The natural way to deliver that feedback is how humans do it: a comment pinned to the exact sentence it's about, not a wall of text dumped at the end of the doc or into chat.
Then you hit the wall: the Google APIs can't create anchored comments. The Docs API has no comment endpoints at all, and the Drive API accepts an anchor field only to have the Docs editor ignore it — the comment shows up as a general, whole-document comment.
This MCP server closes that gap. Your agent calls addcomment with a text fragment and a comment; the server posts it through a real, logged-in Google Docs session, so it lands anchored to that exact text — just as if a human had selected it and pressed Ctrl+Alt+M:
This server does one thing: add a comment to a Google Doc. The interesting case is the anchored one — a comment pinned to a specific text range — which no Google API can do.
Add a comment… Google Docs API Google Drive API this server ---:---::---::---: unanchored (whole document) ❌ ✅ ✅ anchored to a text range ❌ ❌ ✅
From the project README.
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