Rusoto seemed like a good effort last time I looked, it didn't have very full coverage of the AWS API. Amazon just has so many APIs that it's a huge dev effort

Rusoto seemed like a good effort last time I looked, it didn't have very full coverage of the AWS API. Amazon just has so many APIs that it's a huge dev effort to implement it all and keep up with changes. This is a problem in other languages where Amazon doesn't contribute to keeping the client up-to-date. I'm hopeful that with macros 1.1, the situation will improve since it will enable compile-time code generation based on the official json files in botocore. Just add that repo as a git submodule and then: #[derive(Aws!("s3/2006-03-01/service-2.json"))] struct S3; Becomes up-to-date with the latest changes from Amazon the moment they're released (recompile required). Procedural macros are really exciting with regard to writing/consuming APIs as they enable both the client and the server interface to be implemented in an API specification language (Amazon uses custom JSON, but Swagger/RAML could work too) instead of Rust with zero performance penalty (gotta love those zero-cost abstractions :-)