503 application/problem+json
application/problem+json. Branch on type (a stable URI), not on title
or detail (human-readable, may change).
When it occurs
A dependency was temporarily unavailable or the origin was draining/deploying.How to fix
Retry with exponential backoff. If it persists beyond a few minutes, check the changelog for incident notes. Retryable — retry with exponential backoff (respectRetry-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.