Liveness Verification

Introduction

This API allows you to perform liveness verification using a selfie image. It analyzes the provided image and returns information about the detected face, including its liveness score.

Endpoint

https://idv-eu.kairos.com/v0.1/liveness-verification

Parameters

• selfie (File) - The selfie image file for liveness verification. The image size must be at least 480x480 pixels.

• threshold (Numeric Value) - A numeric value (between 0 and 1) representing the threshold for liveness verification. The API will consider a face as live if its liveness score is greater than or equal to this threshold.

Authentication

To access the API, you need to include the following headers in your request:

• app_id: Your application's unique identifier.

• app_key: Your application's authentication key.

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Request

To make a liveness verification request, you can use the following examples:

Node.js

var request = require('request');
var fs = require('fs');
var options = {
  'method': 'POST',
  'url': 'https://idv-eu.kairos.com/v0.1/liveness-verification',
  'headers': {
    'app_id': 'put_app_id_here',
    'app_key': 'put_app_key_here'
  },
  formData: {
    'selfie': {
      'value': fs.createReadStream('/path/to/selfie_image'),
      'options': {
        'filename': 'selfie.jpg'
      }
    },
    'threshold': '0.6'
  }
};
request(options, function (error, response) {
  if (error) throw new Error(error);
  console.log(response.body);
});

Python

cURL

Replace app_id, app_key, and selfie with your actual credentials and the path to your selfie image.

Response (HTTP 200)

If the request is successful, you will receive a response data:

{
  "api_req_uid": "c6bb825f-871c-4323-8c06-8e5fd3517747",
  "processed_at": "2024-04-01 20:05:17",
  "requested_at": "2024-04-01 20:05:17",
  "response_code": 2,
  "response_data": {
    "faces_liveness": 0.0,
    "faces_predicted": [
      {
        "confidence": 0.9885,
        "delta": {
          "x": 18.9982,
          "y": 25.3957
        },
        "top_left": {
          "x": 38.0577,
          "y": 4.0824
        }
      }
    ],
    "img": {
      "height": 71,
      "width": 95
    }
  }
}

Other Responses

• 5xx: Server errors may occur, and the server will respond with an appropriate 5xx status code. In this case, please check your request and try again later.

• 4xx: Authentication failures may result in a 4xx status code. Make sure you have provided valid app_id and app_key in the request headers.

• 403: If limits are exceeded, you may receive a 403 Forbidden status code indicating that you have reached a usage limit. Check your account limits and consider upgrading your plan if needed.