FaceID API Lets Developers Add Face Liveness Detection via Simple REST Calls

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FaceID API is a free-tier REST service that enables web and mobile app developers to integrate face liveness detection without proprietary hardware or expensive platforms. The API uses a secure session model where the API key stays server-side, and a widget URL is passed to the frontend via an iframe, ensuring no raw biometric data is exposed. During verification, the browser-based widget runs a real-time head-movement challenge using MediaPipe FaceMesh, tracking 468 facial landmarks before generating a compact mathematical descriptor that is sent to the server. The service supports three modes — register, verify, and authenticate — covering first-time enrollment, one-to-one matching, and one-to-many search respectively. FaceID API is available at faceidentity.site with a free tier of up to 200 enrollments per month and no credit card required.

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