| Error Code | Error Code Meaning |
| 404 | Unknown error. |
| 401 | Login credentials not valid. |
| 429 | Rate limit exceeded. |
| 620 | Method doesn’t exist. |
| 623 | Calling parameters do not match signature. |
| 631 | Failed to parse request. Request is invalid. |
| 632 | Invalid request, no method passed; request must contain a ‘methodName’. |
| 633 | Param must contain a value. |
| 634 | Invalid method name. |
| 620 | Method does not exist. |
| 637 | A parameter is not valid. |
| 639 | Method not allowed for this user. |
| 40001 | The domain is not available. |
| 40004 | The domain is not valid. |
| 40011 | The domain configuration is not valid. |
| 40014 | The account type is not valid. |
| 40015 | Domain configuration is not available for this account type. |
| 40401 | Customer not connected to the reseller. |
| 50001 | Account parameters are not valid. |
| 60001 | Insufficient funds. |
Fault response example:
<?xml version="1.0" encoding="UTF-8"?>
<methodresponse>
<fault>
<value>
<struct>
<member>
<name>faultCode</name>
<value>
<int>40001</int>
</value>
</member>
<member>
<name>faultString</name>
<value>
<string>The domain is not available.</string>
</value>
</member>
</struct>
</value>
</fault>
</methodresponse>⏎