You can definitely use one Lambda function to serve all of the endpoints that the author mentions. You need a wildcard route in API gateway, and can easily use

You can definitely use one Lambda function to serve all of the endpoints that the author mentions. You need a wildcard route in API gateway, and can easily use koa-serverless or express-serverless to get the route information when any request is received. That way you only need one function for your APIs. Even with a regular api not on lambda, you’ll still have to be aware of db connections.