| Name | Description | Type | Additional information |
|---|---|---|---|
| error_code |
Zero if no errors. See 'error_message' for a detailed description of the error. |
integer |
None. |
| error_message |
Returns a detailed description of the error. |
string |
None. |
| delivery_estimates |
The estimated delivery dates, the cut-off applied, and the zone it was read in. Omitted when no estimate could be produced — see 'error_code' and 'error_message'. |
delivery_estimates |
None. |