Security & Secrets Tier 2 Ready POST /v1/security-headers

Security Headers & CSP Checker API — Grade HTTP Response Headers (A+ to F)

Audit CSP, HSTS, and browser security headers with an A+ to F grade and fix snippets. Audit HTTP security headers (CSP, HSTS, X-Frame-Options, COOP/COEP, Permissions-Policy) from a header map or live URL and get an A+ to F grade.

Try It Live in Your Browser · No API Key Required

1. Interactive Sandbox & Sample JSON Output

200 OK · Ready

Editable Request JSON (`POST /v1/security-headers`)

Live 200 OK Response Envelope

{
  "ok": true,
  "data": {
    "target_url": null,
    "http_status": null,
    "score": 55,
    "grade": "D",
    "checks": {
      "hsts": {
        "status": "pass",
        "score": 25,
        "max_score": 25,
        "value": "max-age=63072000; includeSubDomains; preload",
        "issues": [],
        "fix": null
      },
      "csp": {
        "status": "fail",
        "score": 0,
        "max_score": 25,
        "value": null,
        "issues": [
          "Missing Content-Security-Policy header"
        ],
        "fix": "default-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none'"
      },
      "x_content_type_options": {
        "status": "pass",
        "score": 15,
        "max_score": 15,
        "value": "nosniff",
        "issues": [],
        "fix": null
      },
      "frame_protection": {
        "status": "pass",
        "score": 15,
        "max_score": 15,
        "value": "DENY",
        "issues": [],
        "fix": null
      },
      "referrer_policy": {
        "status": "fail",
        "score": 0,
        "max_score": 10,
        "value": null,
        "issues": [
          "Missing Referrer-Policy header"
        ],
        "fix": "strict-origin-when-cross-origin"
      },
      "permissions_policy": {
        "status": "warn",
        "score": 0,
        "max_score": 10,
        "value": null,
        "issues": [
          "Missing Permissions-Policy header"
        ],
        "fix": "geolocation=(), microphone=(), camera=()"
      }
    },
    "cors": {
      "allow_origin": null,
      "allow_credentials": null,
      "wildcard": false,
      "misconfigured": false
    },
    "fixes": [
      {
        "header": "Content-Security-Policy",
        "priority": "high",
        "recommended_value": "default-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none'"
      },
      {
        "header": "Referrer-Policy",
        "priority": "medium",
        "recommended_value": "strict-origin-when-cross-origin"
      },
      {
        "header": "Permissions-Policy",
        "priority": "low",
        "recommended_value": "geolocation=(), microphone=(), camera=()"
      }
    ]
  },
  "meta": {
    "request_id": "req_sh_01",
    "ms": 1
  }
}

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2. Quickstart Code Examples

Full TypeScript & Python SDK →

curl -X POST "https://api.tinplate.dev/v1/security-headers" \
  -H "Content-Type: application/json" \
  -H "X-RapidAPI-Key: YOUR_RAPIDAPI_KEY" \
  -d '{"headers":{"strict-transport-security":"max-age=63072000; includeSubDomains; preload","x-content-type-options":"nosniff","x-frame-options":"DENY"}}'

import { TinplateClient } from "@tinplate/sdk"; // npm install @tinplate/sdk

const tinplate = new TinplateClient({
  rapidApiKey: process.env.RAPIDAPI_KEY!,
});

const { data, meta } = await tinplate.call("/v1/security-headers", {
  "headers": {
    "strict-transport-security": "max-age=63072000; includeSubDomains; preload",
    "x-content-type-options": "nosniff",
    "x-frame-options": "DENY"
  }
});
console.log(`[${meta.ms} ms]`, data);

import requests

response = requests.post(
    "https://api.tinplate.dev/v1/security-headers",
    headers={
        "Content-Type": "application/json",
        "X-RapidAPI-Key": "YOUR_RAPIDAPI_KEY",
    },
    json={
  "headers": {
    "strict-transport-security": "max-age=63072000; includeSubDomains; preload",
    "x-content-type-options": "nosniff",
    "x-frame-options": "DENY"
  }
}
)
print(response.json())

const response = await fetch("https://api.tinplate.dev/v1/security-headers", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "X-RapidAPI-Key": "YOUR_RAPIDAPI_KEY",
  },
  body: JSON.stringify({
  "headers": {
    "strict-transport-security": "max-age=63072000; includeSubDomains; preload",
    "x-content-type-options": "nosniff",
    "x-frame-options": "DENY"
  }
}),
});
const result = await response.json();
console.log(result);

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "tinplate_security_headers",
    "arguments": {
      "headers": {
        "strict-transport-security": "max-age=63072000; includeSubDomains; preload",
        "x-content-type-options": "nosniff",
        "x-frame-options": "DENY"
      }
    }
  }
}

OpenAPI 3.0.3 Schema Contract

Request Parameters & Response Schema Reference

Request Body Parameters (`POST /v1/security-headers`)

Parameter	Type & Constraints	Description
`url`optional	`string` maxLen: 2048	Target URL to fetch via private fetcher and inspect security headers.
`headers`optional	`object`	Optional raw response headers to audit offline without making an HTTP request.

Response `data` Object Fields (`200 OK`)

Field	Type	Description
`target_url`	`string \| null`	Field 'target_url'
`http_status`	`integer \| null`	Field 'http_status'
`score`	`integer`	Field 'score'
`grade`	`"A" \| "B" \| "C" \| "D" \| "F"`	Field 'grade'
`checks`	`object`	Field 'checks'
`cors`	`object`	Field 'cors'
`fixes`	`object[]`	Field 'fixes'

3. What HTTP Security Header Scanner API Detects & Validates

Evaluates Content-Security-Policy (flags unsafe-inline, unsafe-eval, wildcard sources, missing frame-ancestors)
Checks Strict-Transport-Security max-age, includeSubDomains, and preload readiness
Audits X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Permissions-Policy, and CORP/COOP/COEP
Flags information-disclosure headers (Server version banners, X-Powered-By, X-AspNet-Version)
Accepts either a raw headers JSON object or a public URL to inspect live

Honest Engineering Boundaries

4. Known Limitations & Test Verification

Release Version: v1.0.7 · Last Verified / Benchmarked: 14 November 2026 · Latency Note: Sub-millisecond figures measure in-Worker V8 compute time (typical client HTTPS network RTT to the nearest Cloudflare PoP is 15–65 ms) · See Full Portfolio Benchmarks & Corpora →

Evaluates HTTP response headers only; does not scan page HTML for inline <meta http-equiv> CSP tags unless headers are extracted first.
Tested v1.0.4 (14 November 2026).

5. Marketplace Plans & Payload Quotas

Plan	Monthly Price	Included Requests	Rate Limit	Max Request Payload	Best For
BASIC	$0.00 / month	500 / month (hard limit)	10 req / min	64 KB	Evaluation, local development & CI smoke tests
PRO	$9.99 / month	15,000 / month	60 req / min	128 KB	Solo developers & production apps
ULTRA	$29.99 / month	100,000 / month	300 req / min	256 KB	Growing SaaS & multi-agent pipelines
MEGA	$79.99 / month	500,000 / month	1,000 req / min	256 KB	High-volume enterprise workloads

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6. Frequently Asked Questions

Can I scan internal staging apps without exposing them to the internet?

Yes! Pass the response headers map directly in the headers JSON field—no outbound URL fetch is required.

Does it parse CSP directives in detail?

Yes, it parses every CSP directive and flags dangerous tokens like 'unsafe-inline', 'unsafe-eval', and data:/http: wildcards.

Does it provide copy-paste remediation headers?

Yes, each finding includes a recommended header value snippet.

Zero Payload Logging

7. Data Handling, Privacy & Marketplace Proxy Disclosure

Stateless header evaluation; zero logging.

Worker Zero-Logging Guarantee: Cloudflare Workers Observability and invocation logging are disabled in configuration (observability.enabled = false, head_sampling_rate = 0, invocation_logs = false). Payloads are processed strictly in volatile V8 memory and never logged or stored by Tinplate.

Marketplace Proxies vs. Direct Bearer Key: Requests sent via RapidAPI or Zyla API Hub pass through those marketplaces' proxy infrastructure (subject to their respective privacy policies). Security-sensitive workloads requiring end-to-end zero-intermediary processing can connect directly to https://api.tinplate.dev using a Direct Bearer Key (Authorization: Bearer <API_KEY>). Read our full Privacy Notice and OpenAPI 3.0.3 JSON Schema.