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Open Data
Caliber API
Not rated yet · Be the first to rate itWhich red dot optics fit which pistols, each fit cited to a maker or retailer.
Caliber API is a free Open Data 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
- Open Data
- Uptime (30 days)
- 100%
Visit documentation ↗caliberapi.com
Online · 1185 msTested Nov 15, 2026 · checked dailyIs it down? Status & uptime
About CaliberAPI
Explore the CaliberAPI pistol optic compatibility dataset: 219 pistols, 144 optics, 11 footprint standards, 30 plate systems and 11857 source-cited
- Provider
- CaliberAPI
- Website
- caliberapi.com ↗
Details from caliberapi.com.
Key facts
- No API key needed
- 100% uptime (30 days)
- Callable from the browser (CORS)
- HTTPS
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Ratings & reviews
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Caliber API FAQ
Who provides the Caliber API?
The Caliber API is provided by CaliberAPI (caliberapi.com). Explore the CaliberAPI pistol optic compatibility dataset: 219 pistols, 144 optics, 11 footprint standards, 30 plate systems and 11857 source-cited
Is the Caliber API free?
Yes. The Caliber API is listed in the Open Data 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 Caliber API require an API key?
No. The Caliber API requires no authentication, so you can start making requests without signing up.
Can I call the Caliber API from the browser?
Yes. The Caliber API supports CORS, so front-end JavaScript can call it directly.
Does the Caliber API support HTTPS?
Yes. The Caliber API is served over HTTPS, so it's safe to use in production.
Maintain the Caliber API? Add a badge
Show that Caliber is listed on Public APIs. The badge displays its developer rating once it has one.
Markdown
[](https://publicapis.lol/apis/caliber)
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<a href="https://publicapis.lol/apis/caliber"><img src="https://publicapis.lol/badge/caliber.svg" alt="Caliber on Public APIs" height="20"></a>