Amazon SNS now supports message payloads up to 1 MiB

Amazon Simple Notification Service (Amazon SNS) now supports message payloads up to 1 MiB, a 4x increase from the previous 256 KiB limit, so you can publish larger messages to your SNS topics. Amazon SNS is a fully managed pub/sub messaging service that enables you to decouple and scale microservices, distributed systems, and serverless applications. As workloads such as application integration, IoT, and generative AI increasingly exchange larger volumes of data in a single message, the previous 256 KiB limit required customers to offload or split payloads before publishing.