Which solution will meet these requirements MOST cost-effectively?
Configure the CloudFormation template to reference the API endpoint in the DefinitionSubstitutions property for the AWS::StepFunctions::StateMachine resource.
Configure the CloudFormation template to store the API endpoint in an environment variable for the AWS::StepFunctions::StateMachine resource. Configure the state machine to reference the environment variable.
Configure the CloudFormation template to store the API endpoint in a standard AWS::SecretsManager::Secret resource. Configure the state machine to reference the resource.
Configure the CloudFormation template to store the API endpoint in a standard AWS::AppConfig::ConfigurationProfile resource. Configure the state machine to reference the resource.
Explanations:
TheDefinitionSubstitutionsproperty allows the state machine to use dynamic values like the API Gateway endpoint after deployment, making this a straightforward and cost-effective solution.
AWS Step Functions does not support referencing environment variables directly; thus, this method would not work for passing the API endpoint to the state machine.
While storing the API endpoint in Secrets Manager is secure, it adds unnecessary complexity and cost compared to directly referencing the endpoint in the state machine definition.
Using AWS AppConfig is not suitable for this scenario, as it is designed for application configuration management and does not offer direct integration for referencing API endpoints in state machines.
I figure that the answer is:
Configure the CloudFormation template to reference the API endpoint in the DefinitionSubstitutions property for the AWS::StepFunctions::StateMachine resource.