Website Security Scanner API alternatives

Passive website security audit: TLS, security headers, exposed files and a 0-100 score. If it doesn't fit your project, here are the 10 best free Security APIs to use instead in 2026, out of 65 in the directory.

For reference, Website Security Scanner API: 100% uptime (30 days) · Fast: 229 ms response · HTTPS.

1. 1

   DefenceLevel Index API

   Online · 1080 ms

   Daily cyber threat level (DEFCON 5 to 1) with open method, history in JSON/CSV and a badge.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2

   IPLogs API

   Online · 1003 ms

   Free VPN, proxy, Tor and datacenter IP detection. 13 sources, active probing.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   OSV API

   Online · 455 ms

   Open source vulnerability database and distributed triage infrastructure.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4

   Passwordinator API

   Online · 406 ms

   Generate random passwords of varying complexities.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
5. 5

   Presend API

   Online · 529 ms

   Security and developer utility API -- malware, vulnerability, and domain checks, no signup.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
6. 6

   SSL Labs API

   Online · 310 ms

   Deep SSL/TLS server analysis with A+ to F grading.

   • No API key needed
   • 100% uptime (30 days)
   • Fast: 310 ms response
   • HTTPS

   No authHTTPSCORS ?
7. 7

   Intelligence X API

   Online · 396 ms

   Perform OSINT via Intelligence X.

   • 100% uptime (30 days)
   • Fast: 396 ms response
   • HTTPS

   apiKeyHTTPSCORS ?
8. 8

   IPGuardian API

   Online · 1734 ms

   Check IP addresses against 140+ public threat intelligence blocklists.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
9. 9

   LoginRadius API

   Online · 1078 ms

   Comprehensive documentation for integrating LoginRadius authentication, user management, and identity solutions.

   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
10. 10

    Maskbreak API

    Online · 1054 ms

    Detect VPNs, proxies, Tor, bots and antidetect browsers at signup, login and checkout.

    • 100% uptime (30 days)
    • Callable from the browser (CORS)
    • HTTPS

    apiKeyHTTPSCORS

Website Security Scanner API vs alternatives

Website Security Scanner API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
Website Security Scanner	Required	Yes	Unknown	100%	229 ms	Not rated
DefenceLevel Index	No	Yes	Yes	100%	1080 ms	Not rated
IPLogs	No	Yes	Yes	100%	1003 ms	Not rated
OSV	No	Yes	Yes	100%	455 ms	Not rated
Passwordinator	No	Yes	Yes	100%	406 ms	Not rated
Presend	No	Yes	Yes	100%	529 ms	Not rated
SSL Labs	No	Yes	Unknown	100%	310 ms	Not rated
Intelligence X	Required	Yes	Unknown	100%	396 ms	Not rated
IPGuardian	No	Yes	Yes	100%	1734 ms	Not rated

See also: best Security APIs · all Security APIs