curl --request GET \
  --url https://api.example.com/partner/clover/accounts/external/{account_id} \
  --header 'X-API-NONCE: <x-api-nonce>' \
  --header 'X-API-SIGNATURE: <x-api-signature>' \
  --header 'X-API-SUBSCRIPTION-KEY: <x-api-subscription-key>' \
  --header 'X-API-TIMESTAMP: <x-api-timestamp>'

import requests

url = "https://api.example.com/partner/clover/accounts/external/{account_id}"

headers = {
    "X-API-SIGNATURE": "<x-api-signature>",
    "X-API-TIMESTAMP": "<x-api-timestamp>",
    "X-API-NONCE": "<x-api-nonce>",
    "X-API-SUBSCRIPTION-KEY": "<x-api-subscription-key>"
}

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

print(response.text)

const options = {
  method: 'GET',
  headers: {
    'X-API-SIGNATURE': '<x-api-signature>',
    'X-API-TIMESTAMP': '<x-api-timestamp>',
    'X-API-NONCE': '<x-api-nonce>',
    'X-API-SUBSCRIPTION-KEY': '<x-api-subscription-key>'
  }
};

fetch('https://api.example.com/partner/clover/accounts/external/{account_id}', 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.example.com/partner/clover/accounts/external/{account_id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "X-API-NONCE: <x-api-nonce>",
    "X-API-SIGNATURE: <x-api-signature>",
    "X-API-SUBSCRIPTION-KEY: <x-api-subscription-key>",
    "X-API-TIMESTAMP: <x-api-timestamp>"
  ],
]);

$response = curl_exec($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.example.com/partner/clover/accounts/external/{account_id}"

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

	req.Header.Add("X-API-SIGNATURE", "<x-api-signature>")
	req.Header.Add("X-API-TIMESTAMP", "<x-api-timestamp>")
	req.Header.Add("X-API-NONCE", "<x-api-nonce>")
	req.Header.Add("X-API-SUBSCRIPTION-KEY", "<x-api-subscription-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.example.com/partner/clover/accounts/external/{account_id}")
  .header("X-API-SIGNATURE", "<x-api-signature>")
  .header("X-API-TIMESTAMP", "<x-api-timestamp>")
  .header("X-API-NONCE", "<x-api-nonce>")
  .header("X-API-SUBSCRIPTION-KEY", "<x-api-subscription-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/partner/clover/accounts/external/{account_id}")

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

request = Net::HTTP::Get.new(url)
request["X-API-SIGNATURE"] = '<x-api-signature>'
request["X-API-TIMESTAMP"] = '<x-api-timestamp>'
request["X-API-NONCE"] = '<x-api-nonce>'
request["X-API-SUBSCRIPTION-KEY"] = '<x-api-subscription-key>'

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

{
  "message": "<string>",
  "data": {
    "external_account_id": "<string>",
    "external_account_number": "<string>",
    "external_account_title": "<string>",
    "external_institution_aba": "<string>",
    "external_institution_name": "<string>"
  }
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}