Which service enables customers to audit API calls in their AWS accounts?

Explanations:

AWS CloudTrail is specifically designed to enable customers to monitor and audit API calls made in their AWS accounts. It provides a detailed record of actions taken by users, roles, or AWS services, which is essential for compliance and operational security.

AWS Trusted Advisor is a service that provides real-time guidance to help you provision your resources following AWS best practices. It focuses on cost optimization, performance, security, and fault tolerance but does not provide auditing capabilities for API calls.

Amazon Inspector is a security assessment service that helps improve the security and compliance of applications deployed on AWS. It assesses applications for vulnerabilities and deviations from best practices but does not audit API calls.

AWS X-Ray is a service that helps developers analyze and debug distributed applications, providing insights into performance and errors. While it tracks requests through applications, it does not specifically audit API calls in AWS accounts.