From HEXONET Wiki
The AddContact command allows you to add a further contact. The system automatically substitutes existing handles. COMMAND
(required) command = AddContact contact = (CONTACT) firstname = (TEXT) lastname = (TEXT) street = (TEXT) city = (TEXT) state = (TEXT) zip = (TEXT) country = (COUNTRY) phone = (PHONE) email = (EMAIL) (optional) middlename = (TEXT) title = (TEXT) fax = (PHONE) organization = (TEXT) vatid = (TEXT) x-at-disclose = 0 | 1 x-at-disclose-voice = 0 | 1 x-at-disclose-fax = 0 | 1 x-at-disclose-email = 0 | 1 x-pl-consentforpublishing = 0 | 1
IMPORTANT: Please have a look at the Domain API-Manual for a current list of allowed parameters.
RESPONSE
(required) code = (CODE) description = (DESCRIPTION) property[contact][0] = (CONTACT)