Integrating with Houzz first requires you to apply to use their Seller APIs. To do this within Houzz, click here.
Once you receive your API credentials, you can find it in Seller Central, under Your Houzz.
Now, select API from the Settings dropdown on the page that appears.
Copy the App ID, User Name, and Token.
Now return to ShipStation.
Head to your Account Settings (the wrench icon in the upper right).
Next, select Selling Channels and then Store Setup from the sidebar on the left.
Click Connect a Store or Marketplace and select Houzz.
On the page that appears, enter your App ID, User Name, and Token.
Click Connect and your Houzz account will be connected!
**Also, keep in mind that Houzz requires a very specific, branded packing slip which will be applied to all Houzz orders natively. So be sure that any automation rule you have that may be overriding the assigned packing slip doesn't apply to your Houzz account(s) connected in ShipStation!