feat: Apps Script fallback for local image insertion in enterprise environments#62
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a-bonus merged 1 commit intoa-bonus:mainfrom Feb 22, 2026
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…e environments
The current insertImage tool requires making uploaded files publicly
readable via drive.permissions.create({ type: 'anyone' }), which is
blocked by many enterprise Google Workspace security policies.
This adds an opt-in Apps Script-based path that bypasses the public
sharing requirement by using DocumentApp to insert images directly
from Drive blobs. The feature is gated behind APPS_SCRIPT_DEPLOYMENT_ID
env var — without it, behavior is completely unchanged.
Changes:
- Add script.external_request OAuth scope
- Add Script API client (google.script v1)
- Refactor uploadImageToDrive() to support skipPublicSharing mode
- Add insertImageViaAppsScript() helper using marker-based insertion
- Modify insertImage tool to use Apps Script path when configured
- Include ready-to-deploy Apps Script in apps_script/
Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
Enterprise Google Workspace environments often block public file sharing (
drive.permissions.create({ type: 'anyone' })), which causesinsertImagewithlocalImagePathto fail with "insufficient permissions".This PR adds an opt-in Apps Script-based fallback that inserts images directly from Drive blobs via
DocumentApp, bypassing the public sharing requirement entirely.How it works
[mcp-img-FILEID]marker at the target position via the Docs APIChanges
src/auth.ts— Addedscript.external_requestOAuth scopesrc/clients.ts— Added Script API client (google.script('v1')) andgetScriptClient()helpersrc/googleDocsApiHelpers.ts— AddedskipPublicSharingoption touploadImageToDrive(), addedinsertImageViaAppsScript()helpersrc/tools/docs/insertImage.ts— Uses Apps Script path whenAPPS_SCRIPT_DEPLOYMENT_IDenv var is set; falls back to existing behavior otherwiseapps_script/mcp_image_inserter.gs— Ready-to-deploy Apps Script functionBackward compatibility
Fully backward compatible. The Apps Script path only activates when
APPS_SCRIPT_DEPLOYMENT_IDis set as an environment variable. Without it, behavior is identical to before.Setup (for users who need this)
apps_script/mcp_image_inserter.gsAPPS_SCRIPT_DEPLOYMENT_IDenv var to the deployment IDTest plan
npm run build)APPS_SCRIPT_DEPLOYMENT_ID, existing behavior is unchangedMade with Cursor