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NetIntel Security Headers Analyzer
x402
NetIntel Security Headers Analyzer is a paid API for AI agents from netintel.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Audits HTTP security headers for a given URL or domain, returning a letter grade, numeric score, per-header pass/warn/fail results, and anti-pattern detections.
Price / call$0.01
Success—
StatusUnknown
How this service works
Fetches a URL and evaluates 10 security-critical response headers (CSP, HSTS, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Permissions-Policy, X-XSS-Protection, CORP, COEP, COOP), detects anti-patterns, and returns an overall security grade (A–F).
Output
A JSON object containing a letter grade (e.g. 'B'), numeric score (e.g. 78), per-header results (present/absent, pass/warn/fail/info, raw value, reason), a summary count of pass/warn/fail/info, detected anti-patterns (e.g. X-Powered-By leakage), score deductions with reasons, the final resolved URL, HTTP status code, content type, and a processing duration in milliseconds.
Example use cases
Example prompt
“Can you audit the security headers for https://mycompany.com and give me a grade, score, and breakdown of which headers are missing or misconfigured?”
Technical details
Endpoint
GEThttps://netintel.dev/security-headers/analyze?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a structured, machine-readable audit of HTTP security headers for any public URL or domain, including per-header grading, anti-pattern detection, and a normalized score. Prefer this over manual header inspection or generic HTTP clients when you need actionable security posture data with letter grades and deduction explanations in a single API call.
Side effects
- Target URL is unreachable or times out — returns an error array with connection failure details
- Invalid or malformed target URL — likely returns a validation error
- Target returns a non-HTTP scheme — unsupported input type
- Network-level block (firewall, CAPTCHA) prevents header retrieval — may return partial or error result
- Payment not completed — x402 payment required error before analysis runs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"meta": {
"duration_ms": 312
},
"grade": "B",
"score": 78,
"errors": [],
"target": "https://example.com",
"results": {
"headers": {
"referrer-policy": {
"reason": "Referrer-Policy is set to strict-origin-when-cross-origin",
"status": "pass",
"present": true,
"raw_value": "strict-origin-when-cross-origin"
},
"x-frame-options": {
"reason": "X-Frame-Options is set to DENY",
"status": "pass",
"present": true,
"raw_value": "DENY"
},
"x-xss-protection": {
"reason": "X-XSS-Protection not set — modern browsers use CSP instead",
"status": "info",
"present": false,
"raw_value": null
},
"permissions-policy": {
"reason": "Permissions-Policy not set — browser features not restricted",
"status": "warn",
"present": false,
"raw_value": null
},
"x-content-type-options": {
"reason": "X-Content-Type-Options is set to nosniff",
"status": "pass",
"present": true,
"raw_value": "nosniff"
},
"content-security-policy": {
"reason": "Content-Security-Policy is set with a strong policy",
"status": "pass",
"present": true,
"raw_value": "default-src 'self'"
},
"strict-transport-security": {
"reason": "HSTS enabled with max-age=31536000",
"status": "pass",
"present": true,
"raw_value": "max-age=31536000; includeSubDomains"
},
"cross-origin-opener-policy": {
"reason": "Cross-Origin-Opener-Policy not set",
"status": "info",
"present": false,
"raw_value": null
},
"cross-origin-embedder-policy": {
"reason": "Cross-Origin-Embedder-Policy not set",
"status": "info",
"present": false,
"raw_value": null
},
"cross-origin-resource-policy": {
"reason": "Cross-Origin-Resource-Policy not set",
"status": "info",
"present": false,
"raw_value": null
}
},
"summary": {
"fail": 0,
"info": 4,
"pass": 6,
"warn": 0
},
"final_url": "https://example.com/",
"status_code": 200,
"content_type": "text/html; charset=utf-8",
"anti_patterns": [
{
"header": "x-powered-by",
"reason": "Information leakage — reveals server framework",
"severity": "warn",
"raw_value": "Express"
}
]
},
"service": "security-headers",
"warnings": [],
"timestamp": "2025-01-15T12:00:00.000Z",
"deductions": [
{
"points": -5,
"reason": "Permissions-Policy not set"
},
{
"points": -2,
"reason": "Cross-Origin-Resource-Policy not set"
},
{
"points": -2,
"reason": "Cross-Origin-Embedder-Policy not set"
},
{
"points": -2,
"reason": "Cross-Origin-Opener-Policy not set"
},
{
"points": -3,
"reason": "X-Powered-By header exposes server framework"
}
]
}
}Tags
x402
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