How to fix: 529 overloaded / service temporarily unavailable
Cause
The provider is temporarily overloaded; this is transient and retryable.
The fix
- 1Retry with exponential backoff and jitter — the official SDKs do this for 5xx/529 by default.
- 2Add a fallback chain: on repeated overload, route to an alternate model or provider.
- 3Spread bursty traffic over time with a queue rather than firing everything at once.
- 4Monitor the provider’s status page if overloads persist beyond normal blips.
Prevent it
Build fallback chains and request queuing into a gateway so provider load doesn’t become an outage for you.
Frequently asked questions
What causes “529 overloaded / service temporarily unavailable”?
The provider is temporarily overloaded; this is transient and retryable.
How do I prevent “529 overloaded / service temporarily unavailable” from recurring?
Build fallback chains and request queuing into a gateway so provider load doesn’t become an outage for you.