APISigning.com was created specifically to address the need to authenticate Amazon API requests. There are tens of thousands of websites that rely on the Amazon Product Advertising API, and every one of them will need to be modified to continue working after August 15th. We assisted websites who migrated off of ECS 3.0 when it was shut down in 2008.
Programming services and the API Signing Service is provide as a service by RoundSphere.com. RoundSphere has been in business for over 5 years and provides custom programming and hosting service to small businesses. We have a lot of experience working with small- to medium-sized websites and in doing the job right