Understanding the API Gateway mTLS chain depth limit Learn why Amazon API Gateway allows only four CA levels for mTLS, what causes 403 errors, and how to reproduce and troubleshoot the depth‑limit.
Access Edge-optimized, Regional and Private API Gateway endpoints from the same VPC Accessing Edge-optimized, Regional, and Private API endpoints from the same VPC presents challenges. This blog details why this occurs and offers solutions, including using custom domain names or special URLs.