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API · /secheaders-api

Security Headers API

healthy 3,524 Subscribers

Fetch any URL and analyse its HTTP response security headers — grading the site A+ to F the way securityheaders.com and Mozilla Observatory do. Pass a URL and the service makes the request server-side (following redirects), then reports which protective headers are present, which are missing (with concrete remediation advice) and which response headers leak information. Graded headers include Strict-Transport-Security (HSTS), Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Permissions-Policy and Cross-Origin-Opener-Policy; information-leak headers include Server and X-Powered-By. A companion endpoint returns every raw response header. Private and internal targets are refused (SSRF-guarded). Built for security audits, CI/CD security gates, attack-surface reviews and compliance checks. A security-header grader — distinct from the SSL/TLS certificate check (sslcheck), host reachability (hostcheck), the IANA HTTP status-code reference (http) and the on-page SEO audit (seo). No upstream key, no cache.

#security-headers #security #http #hsts #csp #web
api.oanor.com/secheaders-api
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Machine-readable spec so AI agents can integrate this API.

/api/secheaders-api/openapi.json
/api/secheaders-api/llms.txt

Discovery: GET /api/index.json lists every API.

Security Headers API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
97 ms
Server probes · 24h
Subscribers
3,524
active
Total calls
57
last 7 days
status Full status page → · 9 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 2,520 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 2,520 calls/month
  • 2 req/sec
  • Header grading + raw headers
  • No credit card
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Starter

€7.10 /month

  • 50,500 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 50.5k calls/month
  • 8 req/sec
  • A+..F grade + remediation
  • Email support
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Pro

€22.10 /month

  • 252,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 252k calls/month
  • 20 req/sec
  • CI/CD security gates
  • Priority support
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Mega

€58.50 /month

  • 910,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 910k calls/month
  • 50 req/sec
  • Security-platform scale
  • Dedicated SLA
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Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Security Headers API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Security Headers API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Security Headers API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Security Headers API cost?
Security Headers API has a free tier with 100 calls / month. Paid plans start at €7.10 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Security Headers API GDPR-compliant?
All requests to Security Headers API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/secheaders-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/secheaders-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/secheaders-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/secheaders-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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