Security Headers
Free scanner that grades the HTTP security response headers of a site
About
Security Headers scans the HTTP response headers of a site and grades its security setup. It shows which headers are missing, such as Content-Security-Policy. The automated check met a bot wall (HTTP 403), so this record uses the listing.
For an agent
Use it to check the security headers of a site before launch. Test Content-Security-Policy changes on staging, because they can block fonts and scripts.
Why it is here. It is the common quick check for security headers.
Install command, framework, licence and component list.
Notable for
- Header grades
- Free scan
Provenance
Verified 2026-10-09. HTTP 403. https://securityheaders.com/ (HTTP 403, page fetched 2026-10-09), depo.zip listing https://www.depo.zip/tools/j571v2tcfkrmv23vsxnyqyktjs89ka5k
