---
title: Merchant Registration for Hosted Service Providers
url: amazon-pay-registration/hosted.html
---

Note: If you are an unhosted provider, please see [Unhosted (providers who will make calls using the merchant's own API keys)](unhosted.html).

If you are a hosted provider, you will need to supply a return URL as part of the POST request that you
initiate. This is the URL where the merchant (and their credentials) will be returned following a
completed registration.

Your account representative will provide you with the **spId**, which will be needed during the
registration flow process.