Domain maping api

I need the following api’s created for domain purchasing and mapping of my software from my site. 1) Check Domain Availability (With price) : require API which provide access to search any domain with price where user can buy it. 2) Customer registration: This API is required to register User to resellerpanel. 3) Domain Forwarding / Mapping (URL masking) : Need API where user (registered) can map their subdomain with purchased domain.