# Firebase: 404 error for Firebase Cloud Messaging clients sending to a URL with a trailing slash

> Firebase status incident “404 error for Firebase Cloud Messaging clients sending to a URL with a trailing slash” on 2026-03-17: impact minor (vendor’s label), 7.2 h, 2 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/firebase/incidents/vh7vsady1p6il4k9d8py
Last updated: 2026-03-20T14:40:40Z

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2026-03-17 07:00 UTC · Resolved: 2026-03-17 14:10 UTC · Duration: 7.2 h
- Updates: 2 · Affected components: Cloud Messaging
- [Vendor status page: https://status.firebase.google.com/incidents/Vh7VSADY1P6iL4k9D8PY](https://status.firebase.google.com/incidents/Vh7VSADY1P6iL4k9D8PY)
- [Company: Firebase](https://rewindex.com/company/firebase.md)

## Timeline of updates

- **service disruption** 2026-03-20 13:05 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** 2026-03-20 14:40 UTC: The rollback is complete - service is fully restored.

## Cite this

Status incident (vendor impact label: minor) posted by Firebase, started 2026-03-17 07:00 UTC, resolved after 7.2 h, 2 update(s).

- Canonical URL: https://rewindex.com/company/firebase/incidents/vh7vsady1p6il4k9d8py
- Citation: Firebase, “404 error for Firebase Cloud Messaging clients sending to a URL with a trailing slash” (2026-03-17 07:00 UTC). Archived by Rewindex: https://rewindex.com/company/firebase/incidents/vh7vsady1p6il4k9d8py (CC BY 4.0).
- Markdown link: `[Firebase: 404 error for Firebase Cloud Messaging clients sending to a URL with a trailing slash (2026-03-17)](https://rewindex.com/company/firebase/incidents/vh7vsady1p6il4k9d8py)`


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Canonical: https://rewindex.com/company/firebase/incidents/vh7vsady1p6il4k9d8py · Markdown: https://rewindex.com/company/firebase/incidents/vh7vsady1p6il4k9d8py.md · JSON: https://rewindex.com/api/v1/companies/firebase/incidents/vh7vsady1p6il4k9d8py · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-05T15:31:40.673Z