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HTTP status codes

HTTP status codes the server can generate in response to HTTP requests:

  • 200 OK: Successful request.
  • 400 Bad Request: Invalid argument (invalid request payload).
  • 403 Forbidden: Permission denied (e.g. invalid API key).
  • 429 Resource Exhausted: Either out of resource quota or reaching rate limiting.
  • 500 Internal Server Error: Internal server error (retry your request).
  • 503 Service Unavailable: Unavailable.
  • 504 Gateway Timeout: Deadline exceeded (retry your request).

Possible reasons for receiving HTTP status code 400 Bad Request: