Security Headers Analyzer

x402

Security Headers Analyzer is a paid API for AI agents from netintel-production-440c.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Fetches a URL and grades its HTTP security response headers (CSP, HSTS, X-Frame-Options, etc.) with an A–F overall score and detected anti-patterns.

Price / call$0.01

Seller volume →—

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

Returns a JSON object with the target URL, an overall letter grade (A–F), a numeric score, per-header pass/fail results for all 10 security headers (CSP, HSTS, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Permissions-Policy, X-XSS-Protection, CORP, COEP, COOP), arrays of warnings, errors, and score deductions, plus a timestamp and service metadata.

Example use cases

Example prompt

“Can you audit the HTTP security headers for https://mycompany.com and tell me what grade it gets, which critical headers are missing, and any anti-patterns detected?”

Technical details

Endpoint

GEThttps://netintel-production-440c.up.railway.app/security-headers/analyze?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a structured, graded audit of a website's HTTP security response headers — especially when you need to check all 10 major security headers at once, detect anti-patterns, and receive an overall A–F grade. Prefer this over manual header inspection or generic HTTP probing tools when you want actionable security feedback for a web application or domain.

Side effects

Target URL unreachable or times out — returns error in errors array
Invalid or malformed URL provided — schema validation failure
Target returns non-HTTP response — parsing error
Rate limiting or network errors from the target host
Missing required 'target' query parameter — request rejected

Input

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "target": "https://www.google.com"
    }
  }
}

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

{
  "meta": {
    "duration_ms": 82
  },
  "grade": "F",
  "score": 24,
  "errors": [],
  "target": "https://www.google.com",
  "results": {
    "headers": {
      "referrer-policy": {
        "reason": "Referrer-Policy not set — browser uses default which may leak URLs",
        "status": "fail",
        "present": false,
        "raw_value": null
      },
      "x-frame-options": {
        "reason": "X-Frame-Options is set to SAMEORIGIN",
        "status": "pass",
        "present": true,
        "raw_value": "SAMEORIGIN"
      },
      "x-xss-protection": {
        "reason": "X-XSS-Protection explicitly disabled — correct for modern browsers with CSP",
        "status": "pass",
        "present": true,
        "raw_value": "0"
      },
      "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 not set — vulnerable to MIME-type sniffing",
        "status": "fail",
        "present": false,
        "raw_value": null
      },
      "content-security-policy": {
        "reason": "Content-Security-Policy not set — no XSS or injection protections",
        "status": "fail",
        "present": false,
        "raw_value": null
      },
      "strict-transport-security": {
        "reason": "Strict-Transport-Security not set — no HTTPS enforcement",
        "status": "fail",
        "present": false,
        "raw_value": null
      },
      "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": 4,
      "info": 3,
      "pass": 2,
      "warn": 1
    },
    "final_url": "https://www.google.com/",
    "status_code": 200,
    "content_type": "text/html; charset=ISO-8859-1",
    "anti_patterns": [
      {
        "header": "server",
        "reason": "Server header present without version",
        "severity": "info",
        "raw_value": "gws"
      }
    ]
  },
  "service": "security-headers",
  "warnings": [],
  "timestamp": "2026-06-13T04:19:22.428Z",
  "deductions": [
    {
      "points": -25,
      "reason": "Content-Security-Policy not set"
    },
    {
      "points": -20,
      "reason": "Strict-Transport-Security not set"
    },
    {
      "points": -10,
      "reason": "X-Content-Type-Options not set"
    },
    {
      "points": -10,
      "reason": "Referrer-Policy not set"
    },
    {
      "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"
    }
  ]
}

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"
      }
    ]
  }
}

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