The current IOT endpoint for an account isn't currently available as a CloudFormation or SSM variable.
This is a simple stack that calls the Describe Endpoint API and returns the response as an Output to this template.
A current version of the AWS Command Line Interface (not sure what the earliest supported version is, but this template has been tested on 1.15.26.
Deploy the template. Stack name will be iot-endpoint:
make deploy
Delete the template:
make delete
Or if you'd like to run this directly with the AWS CLI:
aws cloudformation deploy --capabilities CAPABILITY_IAM --template-file ./template.yml --stack-name $(STACK_NAME)
Or you can launch the stack directly in the AWS console via:
Inspired by https://stackoverflow.com/a/44628055