AWS announces open-source AWS API Models

AWS announces an official source for AWS API Model definition files and service model packages, providing developers with access to API definitions for all AWS services. We now publish daily updates of these API models to an open-source GitHub repository in Smithy format and also publish these packages to Maven Central.

AWS public service models enable developers to take advantage of the same service model definitions that AWS uses for live services. These API models can be pulled into integrated development environments using the new packages available in Maven and can be used for developer tools use cases like mock testing or evolving MCP server needs. By utilizing open source Smithy code generators, you can also generate purpose-built AWS SDKs.

The AWS service API models can be found on GitHub and Maven. Learn more in our AWS News blog post.