API Gateway Custom Domain Name TooManyRequestsException

Question

I have just created a HTTP API and would like to setup a custom domain name *somedomain.mysite.com*

In Console under Create Domain Name, when I select mutual TLS option and enter truststore URI in S3, using ACM public certificate which I have requested earlier for same domain name, there is an error of Too Many Requests.

Under Route53, there is an A record pointing to *somedomain.mysite.com* and a CNAME record to validate the DNS for the certificate under same domain. Using the certificate ARN, I have copied the certificate chain as a PEM file and uploaded to S3

I'm not sure where is the exception coming from as I have not done any updates on API Gateway so far

Answer

I am not sure where. the error is coming from, but, do you need mutual TLS? Usually you do not need mutual TLS for custom domain names. You only need it when you also have client certificates that you want to validate on the server.

API Gateway > Custom Domain Name > TooManyRequestsException

Relevant content