I maintain a small open source library for managing payments websites that uses this architecture [1]. My Lambda costs have been about $0.04 per transaction. A

I maintain a small open source library for managing payments websites that uses this architecture [1]. My Lambda costs have been about $0.04 per transaction. Also you can provision AWS from the browser using a CloudFormation template and a Launch Stack URL [2]. [1]: https://github.com/christophercliff/flatmarket https://github.com/christophercliff/flatmarket. [2]: https://github.com/christophercliff/flatmarket#automated-deployments https://github.com/christophercliff/flatmarket#automated-dep...