Response Code

For 4xx, client errors

  • 400 Bad Request
  • 403 Access Denied and WAF filtered
  • 429 Quota Exceeded, throttle

For 5xx, server errors

  • 502
  • Gateway exception
  • Heavy load
  • Out of order invocations
  • Incompatible output from the lambda
  • 503
  • Service unavailable
  • 504
  • Integration Failure
  • Integration Timeout (Request time after 29 seconds)