curl --request GET \
  --url https://api-sandbox.endl.io/api/v0/customer/{businessId}/card-users \
  --header 'Api-Key: <api-key>' \
  --header 'Api-Version: <api-version>'

import requests

url = "https://api-sandbox.endl.io/api/v0/customer/{businessId}/card-users"

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

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

print(response.text)

const options = {
  method: 'GET',
  headers: {'Api-Version': '<api-version>', 'Api-Key': '<api-key>'}
};

fetch('https://api-sandbox.endl.io/api/v0/customer/{businessId}/card-users', 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/{businessId}/card-users",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  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/{businessId}/card-users"

	req, _ := http.NewRequest("GET", 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.get("https://api-sandbox.endl.io/api/v0/customer/{businessId}/card-users")
  .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/{businessId}/card-users")

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

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

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

{
  "cardholders": [
    {
      "cardholderId": "cus_6OzDYZWl5Aim37RwvZfZ",
      "businessId": "cus_HUCgMg1iqWb379FMNvaJ",
      "firstName": "Ada",
      "lastName": "Lovelace",
      "email": "ada@example.com",
      "status": "active",
      "cards": [
        {
          "cardId": "f92950fa-bc30-4aaa-bafc-995b454bf1e5",
          "kind": "scoped",
          "status": "canceled",
          "last4": "8326",
          "expiryMonth": "05",
          "expiryYear": "2031",
          "displayName": "Agent card",
          "limitAmount": 120,
          "limitFrequency": "allTime",
          "scope": {
            "amountInUSDCents": 100,
            "lifetimeLimitCents": 120,
            "bufferPercentage": 20,
            "expiresAt": null,
            "allowedMccs": [],
            "allowedMerchants": [],
            "cardType": "consumer",
            "purpose": "order 8841",
            "spentAt": "2026-09-29T10:12:00Z"
          }
        }
      ]
    }
  ],
  "nextCursor": null,
  "hasMore": false
}

{
  "code": 400,
  "message": "amountInUSDCents must be an integer from 1 to 10000000",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRCRD_1005",
      "message": "amountInUSDCents must be an integer from 1 to 10000000",
      "field": null
    }
  ]
}

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

{
  "code": 403,
  "message": "Access denied / missing cards permission",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRCORE_1005",
      "message": "Access denied / missing cards permission",
      "field": null
    }
  ]
}

{
  "code": 404,
  "message": "Reference not found",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRREF_1001",
      "message": "Reference not found",
      "field": "userId"
    }
  ]
}

{
  "code": 502,
  "message": "Card issuing temporarily unavailable",
  "status": "ERROR",
  "data": null,
  "errors": [
    {
      "code": "ERRCRD_1009",
      "message": "Card issuing temporarily unavailable",
      "field": null
    }
  ]
}