429 application/problem+json
application/problem+json. Branch on type (a stable URI), not on title
or detail (human-readable, may change).
When it occurs
Your key exhausted its daily request ceiling. The 429 body carriesquota_kind: "daily", limit, tier_name, and reset_at (next UTC midnight).
How to fix
Sleep onRetry-After / retry_after_seconds (the full daily ceiling restores at the next UTC midnight) or upgrade your tier. See Rate limits.
Retryable — retry with exponential backoff (respect Retry-After on 429/503).
See the full error catalog for the response shape and retry matrix.
Every response carries an x-request-id header — include it in any support request.