claude-code - 💡(How to fix) Fix Sustained 502 Bad Gateway from mcp-proxy.anthropic.com (Gmail MCP) [1 comments, 2 participants]

The hosted Gmail MCP endpoint at mcp-proxy.anthropic.com has been returning Cloudflare 502 Bad Gateway errors for at least 2 hours. The Cloudflare error page flags the origin host (mcp-proxy.anthropic.com) as erroring, not Cloudflare itself.

• Retries within seconds return the same error

Error details

TL;DR

The issue can be mitigated by implementing retry logic with exponential backoff for the search_threads API call to handle intermittent Cloudflare 502 Bad Gateway errors.

Guidance

• Investigate the search_threads API call to identify potential causes of the consistent 502 errors, such as payload size or query complexity.
• Implement retry logic with exponential backoff for the search_threads API call to handle intermittent errors.
• Verify the retry logic by testing the API call with a small payload and monitoring the response.
• Consider implementing a circuit breaker pattern to detect and prevent further requests to the failing API endpoint.

Example

No code snippet is provided as the issue does not contain sufficient information about the API implementation.

Notes

The issue may be related to upstream instability, and the retry logic may not completely resolve the issue. Further investigation into the cause of the 502 errors is necessary.

Recommendation

Apply workaround: Implement retry logic with exponential backoff for the search_threads API call, as it can help mitigate the intermittent errors and improve the overall reliability of the system.