Extract device details from user-agent string.
ApicAgent API is a free Development API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Free REST API to detect browser, OS, device from user agent string. Use APIC Agent’s easy to use API and avoid hard to maintain user-agent parsing libraries.
Details from apicagent.com.

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The ApicAgent API is provided by APIC Agent (apicagent.com). Free REST API to detect browser, OS, device from user agent string. Use APIC Agent’s easy to use API and avoid hard to maintain user-agent parsing libraries.
Yes. The ApicAgent API is listed in the Development 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.
No. The ApicAgent API requires no authentication, so you can start making requests without signing up.
Yes. The ApicAgent API supports CORS, so front-end JavaScript can call it directly.
Yes. The ApicAgent API is served over HTTPS, so it's safe to use in production.