Migrate Your App from MWS to Amazon SP-API
- esellerhub

- Apr 5, 2023
- 4 min read

If you are an Amazon seller, you are probably familiar with the two different Amazon Marketplace Web Service (MWS) and Selling Partner API (SP-API) options that you can use to access Amazon's APIs. However, the e-commerce giant has announced that it will be phasing out MWS in favor of SP-API, which offers improved functionality, better scalability, and enhanced security features.
As such, it is essential for Amazon sellers to migrate their applications from MWS to Amazon SP-API as soon as possible to ensure that their operations remain uninterrupted. However, migrating an application can be a complex and challenging process, and it is important to understand the best practices and tools available to help make the transition as smooth as possible.
This article explores the benefits of Amazon SP-API, and how to migrate your application from MWS to SP-API. We will also cover some key considerations and best practices for migrating your application, ensuring a successful transition that will improve your business operations on Amazon's platform.
What is the MWS and Amazon SP API?
The Amazon Marketplace Web Service (MWS) is an API that allows Amazon sellers to communicate with Amazon's marketplace to access and manage their inventory, orders, and product listings. MWS has been used for over 20 years and has been a valuable tool for developers looking to integrate with the Amazon marketplace.
On the other hand, the Amazon Selling Partner API (SP-API) is the latest API released by Amazon, which provides sellers with a new and improved way to interact with the Amazon marketplace. SP-API offers a more modern and streamlined approach to accessing Amazon's marketplace data and is designed to replace the older MWS API.
The Deactivation of Amazon MWS
Amazon has announced that it will deactivate the MWS API by 2023, and all developers will be required to migrate to the new Amazon SP API. This move aims to provide sellers a more streamlined and efficient way to access and manage their inventory, orders, and product listings. It is essential to note that Amazon will no longer support the MWS API after it is deactivated.
Who Should Migrate to SP-API?
All Amazon sellers who use the MWS API should migrate to the new Amazon SP API before the MWS API is deactivated. The migration is necessary to ensure businesses can continue to access and manage their inventory, orders, and product listings on Amazon's marketplace.
What Does the MWS to SP API Migration Look Like?
Migrating from the MWS to SP-API is a complex process that requires careful planning and execution. Below is an overview of the steps involved in the migration process:
Analysis
The first step in the migration process is to analyze your current MWS integration and identify the areas the migration will impact. This analysis should include an assessment of your current MWS integration, any customizations you have made to the MWS API, and any third-party integrations you have in place.
Optimization
The second step is to optimize your existing code to ensure it is compatible with the new Amazon SP API. This may involve updating your code to use the new SP-API endpoints, modifying your data models to support the new data structures, and updating your authentication mechanism to use the new API authentication method.
Expansion
The third step is to expand your integration to take advantage of the new features and capabilities offered by the Amazon SP API. This may involve adding new functionality to your integration to take advantage of the new SP-API endpoints, integrating with new Amazon marketplace services, and exploring new business opportunities enabled by the SP-API.
Technical Documentation
The fourth step is to update your technical documentation to reflect the changes introduced by the new Amazon SP API. This documentation should include updated API documentation, migration guides, and other technical documentation necessary to support your integration.
Development
The final step is to develop and test your new integration with the Amazon SP API. This may involve developing new code, modifying existing code, and testing your integration thoroughly to ensure it works as expected.
It is essential to note that the migration process may take several weeks or even months, depending on the complexity of your integration. Therefore, it is recommended to start the migration process as early as possible to avoid any disruptions to your business operations.
Benefits of Migrating to Amazon SP API
Migrating from the MWS API to the Amazon SP API offers several benefits, including:
Improved performance: The API is designed to provide faster and more reliable access to Amazon's marketplace data. This improved performance can help sellers to manage their inventory, orders, and product listings more efficiently, leading to improved business operations.
Better data security: The Amazon SP API uses modern authentication mechanisms, including OAuth 2.0, which provides better data security than the older MWS API. This increased security can help protect seller data from unauthorized access and breaches.
New features and capabilities: The API introduces new features and capabilities unavailable in the older MWS API. These new features include support for new Amazon marketplace services, improved product listing management, and improved reporting capabilities.
How We Can Help You As Your Custom Amazon SP API Development Partner
As your custom software development company, we can help you seamlessly migrate from the MWS API to the new Amazon Seller Partner API. Our team of experienced developers has in-depth knowledge of the new API and can help you optimize your integration to improve your business operations.
Whether you need help analyzing your current integration, optimizing your code, expanding your integration to new features, or updating your technical documentation, we have the expertise to guide you through every step of the migration process.
We understand the migration process can be complex and time-consuming, so we work closely with our clients to ensure a smooth transition. We take pride in delivering high-quality software solutions that meet our client's specific needs.
Contact us today to learn more about our services and how we can help you migrate to the new Amazon SP API. Let us help you take your Amazon business to the next level.



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