National Buyer Listing Service is the first national listing service of pre-approved residential real estate buyers. It's a marketplace where buyers anonymously post their requirements to the web and receive offers from eager sellers. It's real estate in reverse.
The NationalBLS Partner API allows any real estate website to enhance its offering to consumers by giving access to prospective buyers and their requirements, which is not currently common practice. The API is free to any registered partner of NationalBLS.