Preview Face Proof

Endpoint

POST https://api.verifik.co/v2/zelf-proof/preview

Examines a zero-knowledge face proof to view its metadata and configuration without performing actual biometric verification. This is useful for inspecting proof contents and settings.

Headers

Name	Value
Content-Type	application/json
Authorization	Bearer <token>

Params

Name	Type	Required	Description
zelfProof	string	Yes	The encrypted face proof token to examine
verifierKey	string	No	Verifier key for additional validation

Request

Node.js

const fetch = require("node-fetch");

async function run() {
  const res = await fetch("https://api.verifik.co/v2/zelf-proof/preview", {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      Authorization: `Bearer ${process.env.VERIFIK_TOKEN}`,
    },
    body: JSON.stringify({
      os: "DESKTOP",
      zelfProof: "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"
    }),
  });
  console.log(await res.json());
}

run();

PHP

<?php
$ch = curl_init("https://api.verifik.co/v2/zelf-proof/preview");
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    "Content-Type: application/json",
    "Authorization: Bearer " . getenv("VERIFIK_TOKEN")
]);
$body = json_encode([
    "os" => "DESKTOP",
    "zelfProof" => "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"
]);
curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
echo $response;

Python

import os, requests

url = "https://api.verifik.co/v2/zelf-proof/preview"
headers = {
    "Content-Type": "application/json",
    "Authorization": f"Bearer {os.getenv('VERIFIK_TOKEN')}"
}
payload = {
    "os": "DESKTOP",
    "zelfProof": "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"
}
r = requests.post(url, json=payload, headers=headers)
print(r.json())

Go

package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "net/http"
    "os"
)

func main() {
    payload := map[string]interface{}{
        "os": "DESKTOP",
        "zelfProof": "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",
    }
    b, _ := json.Marshal(payload)
    req, _ := http.NewRequest("POST", "https://api.verifik.co/v2/zelf-proof/preview", bytes.NewBuffer(b))
    req.Header.Set("Content-Type", "application/json")
    req.Header.Set("Authorization", "Bearer "+os.Getenv("VERIFIK_TOKEN"))
    resp, _ := http.DefaultClient.Do(req)
    defer resp.Body.Close()
    var out map[string]interface{}
    json.NewDecoder(resp.Body).Decode(&out)
    fmt.Println(out)
}

Response

200

{
  "data": {
    "passwordLayer": "WithPassword",
    "publicData": {
      "a": "1",
      "vida": "true",
      "b": "2"
    },
    "requireLiveness": true
  }
}

401

{
  "message": "Authentication required",
  "code": "UNAUTHORIZED"
}

403

{
  "message": "Access Forbidden",
  "code": "FORBIDDEN"
}

409

{
  "message": "\"zelfProof\" is required",
  "code": "MissingParameter"
}

500

{
  "message": "internal_error",
  "code": "ERROR"
}

Notes

• The passwordLayer field indicates whether the proof is password-protected (WithPassword or WithoutPassword)
• publicData contains the public data that was stored with the proof (this is visible to anyone with the proof)
• requireLiveness indicates whether liveness detection was required when the proof was created
• This endpoint does not perform biometric verification - it only examines the proof metadata
• No credits are charged for preview operations
• The os parameter is required but doesn't affect the preview functionality
• This is useful for debugging, inspection, and understanding proof configuration before attempting verification
• Private metadata is not exposed in preview mode for security reasons