curl --request POST \
  --url https://api-sandbox.endl.io/api/v0/customer/{userId}/kyc-link \
  --header 'API-KEY: <api-key>' \
  --header 'Api-Version: <api-version>'

import requests

url = "https://api-sandbox.endl.io/api/v0/customer/{userId}/kyc-link"

headers = {
    "Api-Version": "<api-version>",
    "API-KEY": "<api-key>"
}

response = requests.post(url, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Api-Version': '<api-version>', 'API-KEY': '<api-key>'}
};

fetch('https://api-sandbox.endl.io/api/v0/customer/{userId}/kyc-link', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api-sandbox.endl.io/api/v0/customer/{userId}/kyc-link",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_HTTPHEADER => [
    "API-KEY: <api-key>",
    "Api-Version: <api-version>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api-sandbox.endl.io/api/v0/customer/{userId}/kyc-link"

	req, _ := http.NewRequest("POST", url, nil)

	req.Header.Add("Api-Version", "<api-version>")
	req.Header.Add("API-KEY", "<api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api-sandbox.endl.io/api/v0/customer/{userId}/kyc-link")
  .header("Api-Version", "<api-version>")
  .header("API-KEY", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api-sandbox.endl.io/api/v0/customer/{userId}/kyc-link")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Api-Version"] = '<api-version>'
request["API-KEY"] = '<api-key>'

response = http.request(request)
puts response.read_body

{
  "url": "https://in.sumsub.com/websdk/p/sbx_example",
  "userId": "cus_PWEhqXkPKpWXiFd96jGq",
  "ttlSeconds": 3600,
  "expiresAt": "2026-09-09T18:36:03.123456Z"
}

{
  "code": 401,
  "message": "Invalid API key",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRCORE_1004",
      "message": "Invalid API key",
      "field": null
    }
  ]
}

{
  "code": 400,
  "message": "<string>",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "<string>",
      "message": "<string>",
      "field": "<string>"
    }
  ]
}

{
  "code": 404,
  "message": "User with ID 'cus_PWEhqXkPKpWXiFd96jGq' not found",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRREF_1001",
      "message": "User with ID 'cus_PWEhqXkPKpWXiFd96jGq' not found",
      "field": "userId"
    }
  ]
}

{
  "code": 409,
  "message": "Customer already verified",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRCUS_1603",
      "message": "This customer's KYC is already completed; a new verification link is not needed",
      "field": null
    }
  ]
}