The Security Headers Checker API allows you to analyze a website URL to detect the presence and configuration of key security headers such as HSTS, CSP, and X-Frame-Options.

It is ideal for developers and businesses looking to quickly identify missing or misconfigured security headers and improve basic web security practices. The API provides a clear summary with header status, detailed findings, and an overall security grade, making it a fast and practical page-level diagnostic tool rather than a full-site security audit or deep vulnerability assessment.

Try the Security Headers Checker API in the API playground to evaluate and improve your website’s security headers with a simple API call.

Security Headers Audit API

Website Intelligence

Security Headers Audit

URL of the website to check security headers for (http/https only)