Security Headers Audit API

x402

Security Headers Audit API is a paid API for AI agents from x402-extract-service.onrender.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-17).

Audits HTTP security headers for a given URL, returning a grade, score, per-header pass/warn/fail verdicts, and remediation advice.

Price / call$0.02

Seller volume →—

Success—

StatusUnknown

How this service works

URL-to-clean-markdown extraction API, on-demand broken-link scan API, pre-deploy link audit API, DNS health audit API, llms.txt / AI-crawler audit API, spec-linted llms.txt audit API, email-deliverability (SPF/DKIM/DMARC) audit API, PDF-to-markdown conversion API, technology-stack fingerprinting API, security-headers audit API, and PDF metadata-intel API for coding agents. Paid per call in USDC via x402 on Base.

Output

Returns a JSON object with: overall letter grade (e.g. A–F), numeric score (0–100), a list of per-header check results each with header name, current value, verdict (pass/warn/fail), detail explanation, and remediation guidance for failures. Also includes aggregate counts of passes/warnings/failures, a human-readable summary, the final resolved URL, and the timestamp of the check.

Example use cases

Pre-launch security header check

“Before we go live with our new site at https://staging.acmecorp.com, can you audit its security headers and tell me what's failing or missing so we can fix it before launch?”

Continuous monitoring of header regressions

“Run a security headers audit on https://dashboard.myapp.io and let me know if anything has changed or degraded — especially CSP, HSTS, and X-Frame-Options.”

Vendor security due diligence

“I need to assess the HTTP security posture of https://thirdpartyapi.com — can you check their security headers, give me a grade, and flag any serious gaps I should raise with them?”

Technical details

Endpoint

POSThttps://x402-extract-service.onrender.com/headers

When to prefer

Choose this endpoint when you need a structured, graded audit of HTTP security headers for any public URL — especially useful for pre-deploy checks, security reviews, vendor assessments, or automated monitoring pipelines. It provides actionable remediation advice per header, making it more useful than raw curl header dumps or generic scanner tools. Paid per call via USDC/x402 on Base, so ideal for agent workflows that need programmatic, on-demand audits without a subscription.

Side effects

Invalid or unreachable URL returns an error response
Private/internal URLs (localhost, RFC-1918) may be blocked or return no data
Redirect chains may resolve to an unexpected final URL affecting results
Sites with bot-blocking may return incomplete or misleading header data
Payment failure via x402 results in 402 response and no audit data

Input

Schema · Request body

Field	Type	Description
url	string	Public http(s) URL whose response security headers to audit.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "url": "https://example.com/",
    "grade": "B",
    "score": 85,
    "checks": [
      {
        "value": "max-age=63072000; includeSubDomains; preload",
        "detail": "long max-age with includeSubDomains and preload",
        "header": "strict-transport-security",
        "verdict": "pass"
      },
      {
        "value": null,
        "detail": "header missing: no XSS/data-injection containment",
        "header": "content-security-policy",
        "verdict": "fail",
        "remediation": "Deploy a Content-Security-Policy, e.g. default-src 'self'; object-src 'none'; frame-ancestors 'none'; base-uri 'self'."
      }
    ],
    "counts": {
      "fail": 1,
      "pass": 8,
      "warn": 2,
      "total": 11
    },
    "summary": "8/11 pass, 2 warning(s), 1 failure(s) — grade B",
    "finalUrl": "https://example.com/",
    "checkedAt": "2026-09-15T00:00:00.000Z",
    "pricePaidAtomic": "20000"
  }
}

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