A. Deploy the API Gateway REST API to all the required AWS accounts. Use the same custom domain name for all the gateway endpoints so that a single SCM webhook can be used for all events from all accounts.
B. Deploy the API Gateway REST API to all the receiver AWS accounts. Create as many SCM webhooks as the number of AWS accounts.
C. Grant permission to the central AWS account for EventBridge (CloudWatch Events)to access the receiver AWS accounts. Add an EventBridge (CloudWatch Events) event bus on the receiver AWS accounts as the targets to the existing EventBridge (CloudWatch Events) rule. Most Voted
D. Convert the API Gateway type from REST API to HTTP API.