AWS 宣佈 AWS Lambda 可以直接有一個 HTTPS Endpoint 了：「Announcing AWS Lambda Function URLs: Built-in HTTPS Endpoints for Single-Function Microservices」。
如同文章裡面提到的，先前得透過 API Gateway 或是 ALB 才能掛上 Lambda：
Each function is mapped to API endpoints, methods, and resources using services such as Amazon API Gateway and Application Load Balancer.
現在則是提供像 verylongid.lambda-url.us-east-1.on.aws 這樣的網域名稱給你用，而且看說明似乎是直接包含在本來的 Lambda 價錢內？就不用另外搞 API Gateway 或是 ALB 了：
Function URLs are included in Lambda’s request and duration pricing. For example, let’s imagine that you deploy a single Lambda function with 128 MB of memory and an average invocation time of 50 ms. The function receives five million requests every month, so the cost will be $1.00 for the requests, and $0.53 for the duration. The grand total is $1.53 per month, in the US East (N. Virginia) Region.
這讓我想到可以用 Lambda 當特製的 HTTP proxy 的專案，好像可以拿來整到 feedgen 裡面用？