| Simplify_ApiException | Base class for all API exceptions. |
| Simplify_ApiConnectionException | Exception raised when there are communication problems contacting the API. |
| Simplify_AuthenticationException | Exception raised where there are problems authenticating a request. |
| Simplify_BadRequestException | Exception raised when the API request contains errors. |
| Simplify_FieldError | Represents a single error in a field of a request sent to the API. |
| Simplify_ObjectNotFoundException | Exception when a requested object cannot be found. |
| Simplify_NotAllowedException | Exception when a request was not allowed. |
| Simplify_SystemException | Exception when there was a system error processing a request. |