Google incident · via Firebase
404 error for Firebase Cloud Messaging clients sending to a URL with a trailing slash
Resolved after 7 hours 10 minutes, affecting Cloud Messaging and Cloud Messaging (global), on March 17, 2026.
A recent change is causing 404 errors for clients who send messages to a URL which includes a trailing slash (/v1/projects/my-project/messages:send/ vs /v1/projects/my-project/messages:send). We are in the process of rolling back this change. For clients that are impacted, removing the trailing slash from the send URL will immediately resolve the problem.
Affected components
Update timeline
- investigating Mar 20, 2026, 01:05 PM UTC
A recent change is causing 404 errors for clients who send messages to a URL which includes a trailing slash (/v1/projects/my-project/messages:send/ vs /v1/projects/my-project/messages:send). We are in the process of rolling back this change. For clients that are impacted, removing the trailing slash from the send URL will immediately resolve the problem.
- resolved Mar 20, 2026, 02:40 PM UTC
The rollback is complete - service is fully restored.
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