From Serverless Architectures on AWS by Peter Sbarski
This article takes a close look at the API Gateway. We’ll look at the fundamental activities that go into building an API and discuss features such as staging and versioning, as well as caching, logging, and throttling of requests.
From AWS Lambda in Action by Danilo Poccia
When configuring the Amazon API Gateway to use Lambda functions, you can choose to have no authentication and leave the API publicly available. Using this option together with the HTTP GET method allows your API to be called by a web browser. You need to return the expected content type for HTML (text/html) to implement a public website.