Jev 529 Overloaded: What It Means and What to Do
Last checked · Independent guide, not affiliated with TypeSafe AI
HTTP 529 Overloaded means TypeSafe's service is temporarily out of capacity for everyone, not that you exceeded your own limit. Retry after a short, growing delay (the official SDKs retry it automatically), check status.typesafe.ai, and for critical paths have a fallback when Jev does not answer in time.
What 529 means
Section titled “What 529 means”TypeSafe’s API reference lists 529 Overloaded as “TypeSafe is temporarily overloaded. Retry after a short delay.” The code is not a standard HTTP status; some other AI providers use it the same way, for capacity problems on their side.
The difference from a 429 matters for how you respond:
| Aspect | 429 Too Many Requests | 529 Overloaded |
|---|---|---|
| Whose limit? | Yours: your account sent too much | TypeSafe’s: the service is short of capacity |
| Happens at low volume? | No | Yes |
| Fix | Slow down, batch questions, raise limits | Wait and retry; nothing to change in your request |
We did not see a 529 in our own testing on September 19, 2026. It was more likely during launch week: TechCrunch reported that demand briefly left TypeSafe unable to serve users from its API, and TypeSafe’s model page says it is adjusting limits while it adds GPU capacity.
What to do
Section titled “What to do”1. Let the retry logic handle short spikes. Both official SDKs treat every 5xx status, including 529, as retryable: two retries after the first attempt with backoff from 0.5 seconds up to 5 seconds. If you call the HTTP API directly, use the same approach; the example on the 429 page retries both codes.
2. Check the status page. status.typesafe.ai shows whether the TypeSafe API is operational and lists past downtime day by day. More in Is Jev down?
3. Do not hammer the API. Immediate retries in a tight loop make overload worse and can push your own traffic into 429s once service recovers. Use backoff with jitter.
4. Decide what happens when Jev is unavailable. For anything user-facing, set a deadline and a fallback:
- Route the item to a human queue or a default path.
- Fall back to a rule, or to an LLM through TypeSafe’s open-source system-one-adapter, which accepts the same questions.
- For batch jobs, write failed items to a retry queue instead of dropping them.
Timeouts versus 529
Section titled “Timeouts versus 529”The SDKs time out each attempt after 10 seconds by default and retry timeouts and connection errors as well. A slow response that eventually times out, rather than a quick 529, can also indicate trouble on TypeSafe’s side; the status page is the fastest way to tell.
On other channels
Section titled “On other channels”OpenRouter and Vercel sit in front of the same model, so TypeSafe capacity problems can surface there as their own 5xx or rate-limit errors. OpenRouter documents 500 and 502 responses for upstream failures. See Jev API errors.