via aws.amazon.com => original post link
With Amazon SQS, you can send and receive messages between software components at any scale. It was one of the first AWS services I used and as a Solutions Architect, I helped many customers take advantage of asynchronous communications using message queues. In fact, Amazon SQS has been generally available since July 2006 and, under the hood, has always used the same wire protocol based on XML that we call AWS Query protocol.
Today, I am happy to announce that Amazon SQS now supports a JSON-based wire protocol for all APIs. The AWS JSON protocol avoids many of the shortcomings of AWS Query protocol.