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Security Header Diff
x402
Security Header Diff is a paid API for AI agents from api.zfinia.com, paid per call via x402, $0.11/call, status unknown (last checked 2026-10-14).
Compares security-relevant HTTP response headers between two releases and reports specific regressions such as removed headers, weakened HSTS, newly permitted unsafe directives, and CSP enforcement downgrades.
Price / call$0.11
Success—
StatusUnknown
How this service works
Compare a fixed list of ten security-relevant response headers across two releases and name the specific reverts. Reports a header removed, added or changed, and separately a reduced Strict-Transport-Security max-age, dropped includeSubDomains, a newly permitted unsafe-inline or unsafe-eval, and a Content-Security-Policy that moved from enforcing to report-only so it no longer blocks anything. Observable differences only, not an assessment of whether either configuration is adequate.
Output
A structured report listing each observable difference across the ten tracked security headers: headers that were added, removed, or changed in value; a reduced Strict-Transport-Security max-age; removal of includeSubDomains from HSTS; addition of unsafe-inline or unsafe-eval to Content-Security-Policy; and a CSP that moved from enforcing to report-only mode. Does not assess overall adequacy — only reports observable differences.
Example use cases
Pre-deploy security regression check
“Before we promote the new build to production, compare its security headers against the current production headers and flag any regressions — dropped headers, weakened HSTS, or newly permitted unsafe-inline or unsafe-eval.”
Post-incident rollback validation
“We just rolled back to v1.9.2 from v1.9.5 after an incident — compare the security headers of those two releases and tell me exactly what changed, especially if our Content-Security-Policy got weaker or switched to report-only.”
CI/CD pipeline security gate
“As part of our CI pipeline, diff the security headers from the staging build against the last known-good production snapshot and list any specific security regressions so we can block the merge if anything got worse.”
Technical details
Endpoint
POSThttps://api.zfinia.com/x402/v1/security-header-diff?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a precise, named-regression diff of security headers between two specific release snapshots — especially when you need to detect HSTS weakening, CSP unsafe directive additions, or enforcement-to-report-only downgrades. Prefer this over generic diff tools when the security semantics of header changes (not just string differences) matter for release gating or audit trails.
Side effects
- Missing or malformed before/after objects returns a validation error
- Headers objects with unexpected structure may cause incomplete diff results
- Empty header sets may produce no findings even if configurations differ significantly
- Very large or deeply nested header objects may be truncated or rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| after | object | |
| before | object | |
| after_name | string | |
| before_name | string |
Tags
x402
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