Introducting Selling Partner API

Selling Partner API (SP-API) is a modernized suite of REST APIs using standards that today's developers expect, while making it as simple as possible to migrate from our legacy Amazon Marketplace Web Service (Amazon MWS) APIs. SP-API includes all the functionality available in Amazon MWS plus many new APIs; including APIs for vendors. SP-API is available for all registered developers worldwide.
Frequently asked questions
What is Selling Partner API (SP-API)?
SP-API is the next generation suite of API-based automation functionality for Amazon's selling partners and is an evolution of Amazon Marketplace Web Service (MWS) APIs, which have been offering sellers programmatic access to critical Amazon features for more than 10 years. SP-API is available in production in all the marketplaces where Amazon MWS is available.
What are the key differences between MWS and SP-API?
SP-API offers all Selling Partners and third-party Developers a number of improvements over MWS, such as modernized, JSON-based REST API design standards, OAuth2.0 selling partner authorization using Login with Amazon, and a test endpoint - the most requested feature in MWS. In addition to all legacy functionality previously provided in MWS and new API capabilities for sellers, SP-API supports the first ever APIs for Amazon Vendors – all through the same API control plane and authorization mechanisms. Going forward all new API functionality will be built in SP-API, with updates to MWS only to support business critical changes.

Learn more about Login with Amazon here: https://login.amazon.com/
Will anything happen to my existing MWS credentials and integration?
If you are a public developer, creating applications for selling partners, then you must migrate to SP-API by July 31, 2022. Support for Amazon MWS Orders, Reports, and Merchant Fulfillment Network (MFN) sections will be discontinued.

If you are a private developer, creating applications that are self-authorized, there is no change to your existing integration. Amazon MWS private developers may choose to integrate with SP-API at any time.
I use a third party application that is integrated with MWS, does this impact me?
No, there is no change or action needed from sellers who have authorized a third party application to use MWS on their behalf at this time.
Is MWS going away? If so, when?
Yes, the legacy Amazon MWS APIs will be deprecated in the future. We do not yet have an established date, but we will provide both time and tools to support migration of existing Amazon MWS integrations. You can check out the Amazon MWS to Selling Partner API Migration Guide for more information on migrating to SP-API now.
Is it mandatory to migrate from MWS to SP-API? If so, when?
No, it is not mandatory to migrate to SP-API at this time, but we encourage you to review the SP-API information and resources and begin planning your migration to the new functionality.
How can I get more information and stay up to date on SP-API?

Private Developers

You can build applications for use with your own Amazon seller account. This requires you register as a developer. Click Register, below.

Public Developers

You can build applications that sellers authorize and use to help manage their Amazon business. This requires you to register as a developer. Click Register, below.

Amazon Seller Central Partner Network

You can publish your application in the Amazon Seller Central Partner Network (SCPN), where Amazon sellers discover applications created by Amazon and public developers.

If you are a seller who wants to use one of these applications, you are NOT required to register as a developer.
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