I have just pushed an initial release of wai-handler-hal[1] to Hackage. This library lets you run `wai` `Application`s on AWS Lambda, using the proxy integration features of an API Gateway REST API. This allows you to write your APIs using tools like `servant`, test them locally using `warp`, and then build deployment binaries using `hal`. There's an especially nice payoff when you use `servant`: it's very easy to test the entire API locally using `warp`, but then split endpoints into individual Lambda binaries. This means you can assign minimal IAM policies to each Lambda when you deploy to AWS. The library code, an example API, example deployment code (in AWS CDK[2]), and extensive documentation are all available on GitHub[3]; bug reports and pull requests are welcome. Best, -- Jack [1]: https://hackage.haskell.org/package/wai-handler-hal-0.1.0.0 [2]: https://aws.amazon.com/cdk/ [3]: https://github.com/bellroy/wai-handler-hal