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Security
DefenceLevel Index logo

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

DefenceLevel Index API is a free Security API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.

Authentication
None required
HTTPS
Yes
CORS
Yes
Category
Security
Uptime (30 days)
100%
Visit documentation ↗defencelevel.com

Online · 1080 msTested Nov 15, 2026 · checked dailyIs it down? Status & uptime

About DefenceLevel

The DEFCON level of the DefenceLevel Index on your site or in your tools: free of charge, with attribution.

Provider
DefenceLevel
Website
defencelevel.com ↗

Details from defencelevel.com.

Key facts

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

Who provides the DefenceLevel Index API?

The DefenceLevel Index API is provided by DefenceLevel (defencelevel.com). The DEFCON level of the DefenceLevel Index on your site or in your tools: free of charge, with attribution.

Is the DefenceLevel Index API free?

Yes. The DefenceLevel Index API is listed in the Security category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.

Does the DefenceLevel Index API require an API key?

No. The DefenceLevel Index API requires no authentication, so you can start making requests without signing up.

Can I call the DefenceLevel Index API from the browser?

Yes. The DefenceLevel Index API supports CORS, so front-end JavaScript can call it directly.

Does the DefenceLevel Index API support HTTPS?

Yes. The DefenceLevel Index API is served over HTTPS, so it's safe to use in production.

Maintain the DefenceLevel Index API? Add a badge

Show that DefenceLevel Index is listed on Public APIs. The badge displays its developer rating once it has one.

DefenceLevel Index on Public APIs

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