Security headers, CSP, and why crawlers (and users) care

Modern sites rely on dozens of third-party assets. Without a clear Content-Security-Policy and complementary headers, you inherit two problems: security exposure and unpredictable rendering for crawlers that execute JavaScript.

Start with reporting, then enforce

CSP report-only mode is the safe on-ramp. Collect violations, allow-list only what you need, and only then move to enforcement. Pair CSP with Strict-Transport-Security on HTTPS properties.

Headers are part of your API contract

Treat Referrer-Policy, Permissions-Policy, and framing controls as part of your public surface. They reduce data leaks and make embedded experiences safer.

WebKernelAI’s non-WordPress advisor helps teams draft CSP from discovered third parties, compare against live headers, and iterate without guesswork.