This plugin creates a secure REST API endpoint designed for external uptime monitoring services. It is built for site administrators who need more reliable monitoring than a simple HTTP status check, verifying that critical components of their content management system are actually functional.

• Secure Token Authentication: Access to the endpoint is controlled via a configurable token, provided either through a custom header or a query parameter, preventing unauthorized use.
• Comprehensive System Checks: The endpoint performs sequential checks on database connectivity, core system file accessibility, and active theme loading to confirm operational integrity.
• Optional Homepage Verification: An additional setting can enable a check that fetches the site's homepage to detect PHP errors or fatal failures during frontend rendering.
• Monitoring Service Compatibility: It is configured to work with popular monitoring tools like Uptime Kuma, UptimeRobot, and Pingdom, with provided setup examples for each.
• Built-in Security Measures: The implementation includes rate limiting for failed access attempts and uses timing-safe comparison for token validation to enhance security.