Default concurrency limit is 10 in-flight requests per API key.
Behavior
- Up to 10 concurrent requests can run at once per API key.
- When one finishes, a slot opens immediately.
- If you exceed the limit, the API returns HTTP
429.
Retry Guidance
- Track in-flight request count in your client.
- Apply exponential backoff for
429responses. - Add jitter to avoid synchronized retry spikes.
Example Error Envelope
/errors for the current error response format and common error codes.