Você pode usar o AWS API Gateway ( documentação ).
API Gateway helps developers deliver robust, secure and scalable mobile and web application backends. API Gateway allows developers to securely connect mobile and web applications to business logic hosted on AWS Lambda, APIs hosted on Amazon EC2, or other publicly addressable web services hosted inside or outside of AWS. With API Gateway, developers can create and operate APIs for their backend services without developing and maintaining infrastructure to handle authorization and access control, traffic management, monitoring and analytics, version management and software development kit (SDK) generation.
O API Gateway agora oferece suporte à integração do Proxy HTTP para recursos de passagem, para que você não precise descrever sua carga útil e consultar parâmetros de forma explícita (o que era necessário anteriormente).