Example Concept: To secure API endpoints, implement OAuth 2.0 for robust authentication and authorization, ensuring that only authenticated users can access the API. Use HTTPS to encrypt data in transit, protecting it from interception. Additionally, apply rate limiting to control the number of requests from a single client, reducing the risk of denial-of-service attacks. Regularly update and patch API components to mitigate vulnerabilities, and employ logging and monitoring to detect and respond to unauthorized access attempts.