Tutorial2 min readJanuary 20, 2026

Face Verification in React Native: Mobile Integration Guide

How to integrate face verification API into a React Native mobile app — capture selfies, compare with ID photos, and add liveness detection.

Why Face Verification on Mobile?

Mobile apps are the primary channel for KYC onboarding, banking, and identity verification. React Native lets you build cross-platform apps that call the ARSA Face Recognition API directly.

Setup

Since ARSA is a REST API, no native SDK is needed — just use fetch:

javascript

const API_KEY = "your-api-key";
const BASE_URL = "https://faceapi.arsa.technology/api/v1";

Capture a Selfie

Use expo-camera or react-native-camera:

javascript

import { Camera } from 'expo-camera';

const takeSelfie = async (cameraRef) => {
  const photo = await cameraRef.current.takePictureAsync({
    quality: 0.8,
    base64: false,
  });
  return photo.uri;
};

Verify Against ID Photo

javascript

const verifyIdentity = async (selfieUri, idPhotoUri) => {
  const formData = new FormData();
  formData.append("image1", {
    uri: selfieUri, type: "image/jpeg", name: "selfie.jpg"
  });
  formData.append("image2", {
    uri: idPhotoUri, type: "image/jpeg", name: "id.jpg"
  });

  const response = await fetch(
    ${BASE_URL}/face_recognition/validate_faces,
    {
      method: "POST",
      headers: { "x-key-secret": API_KEY },
      body: formData,
    }
  );
  const result = await response.json();
  
  return {
    match: result.match_result,
    similarity: result.similarity_score,
    isRealFace: result.face1_analysis?.passive_liveness?.is_real_face,
    age: result.face1_analysis?.age,
  };
};

Face Analytics on Mobile

javascript

const analyzeFace = async (photoUri) => {
  const formData = new FormData();
  formData.append("face_image", {
    uri: photoUri, type: "image/jpeg", name: "photo.jpg"
  });

  const response = await fetch(
    ${BASE_URL}/face_analytics,
    {
      method: "POST",
      headers: { "x-key-secret": API_KEY },
      body: formData,
    }
  );
  return response.json();
};