{
"url": "https://example.com/",
"finalUrl": "https://example.com/",
"statusCode": 200,
"grade": "F",
"score": 0,
"maxScore": 100,
"headers": {
"strict-transport-security": {
"present": false,
"value": null,
"points": 0,
"maxPoints": 20
},
"content-security-policy": {
"present": false,
"value": null,
"points": 0,
"maxPoints": 20
},
"x-content-type-options": {
"present": false,
"value": null,
"points": 0,
"maxPoints": 15
},
"x-frame-options": {
"present": false,
"value": null,
"points": 0,
"maxPoints": 15
},
"referrer-policy": {
"present": false,
"value": null,
"points": 0,
"maxPoints": 10
},
"permissions-policy": {
"present": false,
"value": null,
"points": 0,
"maxPoints": 10
},
"cross-origin-opener-policy": {
"present": false,
"value": null,
"points": 0,
"maxPoints": 10
}
},
"rawHeaders": {
"accept-ranges": "bytes",
"age": "9366",
"allow": "GET, HEAD",
"cf-cache-status": "HIT",
"cf-ray": "a41caa13f8418982-IAD",
"connection": "close",
"content-type": "text/html",
"date": "Sun, 27 Sep 2026 18:45:15 GMT",
"last-modified": "Sat, 26 Sep 2026 09:10:30 GMT",
"server": "cloudflare"
}
}
curl --location --request GET 'https://zylalabs.com/api/13955/security+headers+checker+api/32472/check+url+security+headers?url=https://example.com' --header 'Authorization: Bearer YOUR_API_KEY'
After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Security Headers Checker API simply include your bearer token in the Authorization header.
| Header | Description |
|---|---|
Authorization
|
Required
Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.
|
No long-term commitment. Upgrade, downgrade, or cancel anytime. Free Trial includes up to 50 requests.
Check any website's HTTP security headers (Strict-Transport-Security, Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Permissions-Policy
The API returns data about a website's HTTP security headers, including their presence, values, and associated scores. The response includes a grade (A+ to F) based on the headers' compliance with security standards.
Key fields in the response include "url," "finalUrl," "statusCode," "grade," "score," and a detailed "headers" object that lists each security header's presence, value, points earned, and maximum points.
The response is structured in JSON format, with a top-level object containing the URL details, status code, grade, score, and a nested "headers" object that details each security header's evaluation.
The primary parameter is the target URL, which users provide to check the security headers. The API follows up to 5 redirects from the initial URL to ensure accurate results.
Typical use cases include pre-deployment checks for web applications, header audits for compliance, and self-service evaluations for site owners to enhance their website's security posture.
Data accuracy is maintained by checking the HTTP response headers directly from the target URL. The API also caches results for 6 hours to ensure consistent responses while minimizing server load.
Users can analyze the "grade" and "score" to assess their website's security posture. The detailed header information allows for targeted improvements by identifying which headers are missing or misconfigured.
Users can expect a score ranging from 0 to 100 and a corresponding grade. Each header will indicate whether it is present, its value, and the points earned, helping users quickly identify areas for improvement.
To obtain your API key, first sign in to your account and navigate to the API you want to use. From the API's Pricing section, choose a plan and complete the subscription process. Once subscribed, return to the API page and you will see your API Access Key displayed at the top of the documentation page. You can use this key to authenticate your requests.
You can’t switch APIs during the free trial. If you subscribe to a different API, your trial will end and the new subscription will start as a paid plan.
The free trial lasts for 7 days and allows you to make up to 50 API requests.
No, the free trial is available only once, so we recommend using it on the API that interests you the most. Most of our APIs offer a free trial, but some may not include this option.
Yes. If the API offers a free trial, you will see a "Free 7-Day Trial" option in its Pricing section. The trial lasts for 7 days and allows up to 50 API requests, enabling you to evaluate the API before subscribing to a paid plan.
Zyla API Hub is like a big store for APIs, where you can find thousands of them all in one place. We also offer dedicated support and real-time monitoring of all APIs. Once you sign up, you can pick and choose which APIs you want to use. Just remember, each API needs its own subscription. But if you subscribe to multiple ones, you'll use the same key for all of them, making things easier for you.
You can monitor your API usage through the response headers included with every request:
x-zyla-api-calls-monthly-used: Shows the total number of API requests you have used during the current billing period.
x-zyla-api-calls-monthly-remaining: Shows the number of API requests you have remaining for the current billing period.
Yes, you can cancel your subscription at any time. Simply go to the Pricing section of the API you're subscribed to and click the "Unsubscribe" button.
Please note that upgrades, downgrades, and cancellations take effect immediately. Once your subscription is canceled, access to the service will end immediately, regardless of any remaining API calls in your quota.
Please have a look at our Refund Policy: https://zylalabs.com/terms#refund