Issue Station
Sign In
Tools hereToolbox

claude-code - 💡(How to fix) Fix [BUG] Gmail connector OAuth hard-blocked by Google ("This app is blocked") — cannot reconnect in CoWork [1 participants]

Official PRs (…)
ON THIS PAGE

Recommended Tools

×6

Utilities matched from this issue’s tags and category — try them while you read without losing context.

GitHub issue graph ai analysis

Paste a GitHub issue URL. We fetch that issue, discover linked issues from bodies/comments/timeline, collect linked pull requests, and produce a structured English report.

The report is written in English Markdown for sharing and archival.

Helpful · Quick feedback

Loading…
GitHub stats
anthropics/claude-code#52177•Fetched 2026-04-23 07:34:34
View on GitHub
Comments
0
Participants
1
Timeline
3
Reactions
0
Author
danpurdamdanpurdam
Participants
danpurdamdanpurdam
Timeline (top)
labeled ×3

Error Message

Error Messages/Logs

No error code provided by Google.

Fix Action

Fix / Workaround

Additional Context

  • Google Calendar connector connects successfully on the same account
  • Prior to the hard block, Gmail showed inconsistent read/write behaviour
  • Removed Claude access entirely from Google Account (myaccount.google.com/permissions) and retried from scratch — same result
  • This appears related to #46206 (missing gmail.modify scope) and possibly #30166 (OAuth callback issues)
  • No workaround available at the user level — this requires Anthropic to resolve the Gmail app's OAuth scope verification with Google

Code Example

Google OAuth screen: "This app is blocked. This app tried to access 
sensitive info in your Google Account. To keep your account safe, 
Google blocked this access."

No "Advanced" or "Proceed anyway" option is shown.
No error code provided by Google.
RAW_BUFFERClick to expand / collapse

Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet

Platform: macOS (claude.ai / CoWork)

What's Wrong?

The Gmail connector in Claude CoWork fails to reconnect with a hard Google OAuth block. Google displays "This app is blocked. This app tried to access sensitive info in your Google Account." There is no "Advanced" or "Proceed anyway" option — the block is terminal.

Steps to Reproduce

  1. Open Claude CoWork → Connectors
  2. Attempt to connect/reconnect Gmail
  3. Complete Google OAuth flow
  4. Google shows "This app is blocked" — no bypass available

Expected Behaviour Gmail connector authenticates successfully, same as Google Calendar connector.

Actual Behaviour Hard block from Google. Cannot proceed. Revoke + retry does not help.

Additional Context

  • Google Calendar connector connects successfully on the same account
  • Prior to the hard block, Gmail showed inconsistent read/write behaviour
  • Removed Claude access entirely from Google Account (myaccount.google.com/permissions) and retried from scratch — same result
  • This appears related to #46206 (missing gmail.modify scope) and possibly #30166 (OAuth callback issues)
  • No workaround available at the user level — this requires Anthropic to resolve the Gmail app's OAuth scope verification with Google

What Should Happen?

Gmail connector authenticates successfully via OAuth, the same way Google Calendar does on the same account. After completing the Google consent screen, Gmail shows as "Connected" in CoWork connectors and its tools become available in chat.

Error Messages/Logs

Google OAuth screen: "This app is blocked. This app tried to access 
sensitive info in your Google Account. To keep your account safe, 
Google blocked this access."

No "Advanced" or "Proceed anyway" option is shown.
No error code provided by Google.

Steps to Reproduce

  1. Open Claude CoWork → Connectors
  2. Click Connect (or Reconnect) on the Gmail connector
  3. Complete the Google account selection and OAuth flow
  4. Google displays "This app is blocked" — no way to proceed

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

N/A — issue occurs in Claude CoWork via claude.ai web interface, not Claude Code CLI

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

No response

extent analysis

TL;DR

The Gmail connector in Claude CoWork is blocked by Google due to insufficient OAuth scope verification, requiring Anthropic to resolve the issue with Google.

Guidance

  • The issue seems related to missing gmail.modify scope and OAuth callback issues, as mentioned in #46206 and #30166, which need to be addressed by Anthropic.
  • To verify the issue, attempt to connect the Gmail connector in Claude CoWork and check if the Google OAuth screen displays the "This app is blocked" message.
  • As a potential mitigation, Anthropic could review and update the OAuth scope verification for the Gmail connector to match the successful Google Calendar connector.
  • Users can try removing Claude access from their Google Account and retrying the connection, but this may not resolve the issue due to the hard block from Google.

Notes

The issue appears to be specific to the Gmail connector in Claude CoWork and is not resolved by revoking and retrying the connection or removing Claude access from the Google Account.

Recommendation

Apply workaround: Anthropic should investigate and address the OAuth scope verification issue for the Gmail connector, potentially by updating the scope to match the Google Calendar connector, to resolve the hard block from Google.

Vote matrix · Quick signals

Works
Did the solution work? Tap to confirm.
Easy Fix
Was it a quick fix?
Time Saver
Did it save you time?
Blocking
Was it severely blocking?
Common Issue
Are others likely hitting this too?
Flaky / Intermittent
Is it intermittent?
Verified / Reproducible
Can you reproduce it reliably?
Loading…
#api#indexing error#inference speed#output truncation#response parsing

Still need to ship something?

×6

Another batch ranked right after the header list — different links, same matching logic.

Back to top recommendations

TRENDING