# Meta Provider API calls are failing on OpenRouter with error 401.

- Provider: [OpenRouter](https://down.guide/providers/openrouter)
- Confidence: Confirmed
- Impact: Partial outage
- lasted 0m
- started 2026-09-25 00:33 UTC
- id: DWN-632dff6d71
- Official page: https://status.openrouter.ai/7e562219-ff53-496e-94b8-e416c40bfce0

## Root cause
> Root cause is still unknown.

[Postmortem](https://status.openrouter.ai/7e562219-ff53-496e-94b8-e416c40bfce0)

## Updates from OpenRouter
### 2026-09-25 00:33 UTC: resolved
Sep 25, 00:33 UTC 
 Resolved - The issue is now resolved. Root cause was identified as an authentication issue on the Meta Developer API Platform impacting all Managed Meta Accounts including OpenRouter's. 
 Sep 24, 23:46 UTC 
 Monitoring - Meta Provider API calls are operational again. We are continuing to monitor. 
 Sep 24, 23:28 UTC 
 Monitoring - The Meta team has begun applying remediations and success rate is improving. Root cause is still unknown. 
 Sep 24, 23:15 UTC 
 Identified - The Meta team is continuing to investigate and is beginning work on remediation. Root cause is still unknown. 
 Sep 24, 22:55 UTC 
 Investigating - The Meta team has been pinged and is investigating.

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