| Connected account | The connected account to use for the request | Connected Account | Yes | |
| User ID | ID for the new customer. If not given, this will be auto-generated | Text (Short) | No | |
| First name | The first name of the customer | Text (Short) | No | |
| Last name | The last name of the customer | Text (Short) | No | |
| Email | The email address of the customer | Email | No | |
| Phone number | The phone number of the customer | Text (Short) | No | |
| Company name | The company of the customer | Text (Short) | No | |
| Custom property 1 name | Name of the property to set | Text (Short) | No | |
| Custom property 1 value | Value of the property to set | Text (Long) | No | |
| Custom property 2 name | Name of the property to set | Text (Short) | No | |
| Custom property 2 value | Value of the property to set | Text (Long) | No | |
| Custom property 3 name | Name of the property to set | Text (Short) | No | |
| Custom property 3 value | Value of the property to set | Text (Long) | No | |