How to generate a certificate

What do you mean by: Get a certificate from the API?

When you create an API the service will use a certificate for the generated domain name. If you want to create your own custom domain name, you will need to create a certificate in Amazon Certificate Manager (ACM).

The following links contain more details around generating certificates for the API gateway:

• https://docs.aws.amazon.com/apigateway/latest/developerguide/getting-started-client-side-ssl-authentication.html#generate-client-certificate
• https://docs.aws.amazon.com/apigateway/latest/developerguide/how-to-custom-domains-prerequisites.html
• https://aws.amazon.com/about-aws/whats-new/2017/03/amazon-api-gateway-integrates-with-aws-certificate-manager-acm/