In order to use the Houzz Seller APIs, you must have an approved Marketplace seller account. You can apply for a seller account at http://www.houzz.com/sell. Select API under Settings and fill out the registration form as shown below.
You can also contact Houzz by emailing firstname.lastname@example.org to obtain an application ID and application token to use in all API requests.
Once your application is approved, we will share API documentation with you.