SKILL.md
Custom Domain REST API with Lambda and Request Authorizer
Overview
This SOP deploys a REST API with a Regional custom domain name, a Lambda backend function, and a request-based Lambda authorizer. It handles ACM certificate provisioning, IAM role creation, Lambda function deployment, API Gateway REST API creation with a custom authorizer, custom domain configuration, base path mapping, and Route 53 DNS setup.
The architecture includes:
- An API Gateway REST API with an endpoint type of REGIONAL
- A request-based Lambda authorizer that validates headers, query string parameters, and stage variables
- A Lambda backend function at
GET /example - A custom domain name with TLS 1.2
- A base path mapping connecting the custom domain to the API stage
- A Route 53 A-alias record pointing the custom domain to the API Gateway Regional endpoint
Important: This SOP uses Regional endpoints. If the user requests a private endpoint, inform them that this skill covers Regional endpoints only. Private endpoints require VPC endpoint configuration.