Floci is a high performance, open source AWS service emulator designed for local development and continuous integration environments. https://www.i-programmer.info/news/90-tools/19067-floci-a-high-performance-local-aws-emulator-guide.html
Version 2.0.0 of the C# SDK has been updated to implement the 2026-07-28 Model Context Protocol specification revision. https://www.i-programmer.info/news/89-net/19065-c-sdk-for-model-context-protocol-version-20-announced.html