curl --request GET \
  --url https://api.sandbox.services.payward.com/v1/ramp/countries \
  --header 'API-Key: <api-key>' \
  --header 'API-Nonce: <api-key>' \
  --header 'API-Sign: <api-key>'

import requests

url = "https://api.sandbox.services.payward.com/v1/ramp/countries"

headers = {
    "API-Key": "<api-key>",
    "API-Sign": "<api-key>",
    "API-Nonce": "<api-key>"
}

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

print(response.text)

const options = {
  method: 'GET',
  headers: {'API-Key': '<api-key>', 'API-Sign': '<api-key>', 'API-Nonce': '<api-key>'}
};

fetch('https://api.sandbox.services.payward.com/v1/ramp/countries', 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.services.payward.com/v1/ramp/countries",
  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-Nonce: <api-key>",
    "API-Sign: <api-key>"
  ],
]);

$response = curl_exec($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.services.payward.com/v1/ramp/countries"

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

	req.Header.Add("API-Key", "<api-key>")
	req.Header.Add("API-Sign", "<api-key>")
	req.Header.Add("API-Nonce", "<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.services.payward.com/v1/ramp/countries")
  .header("API-Key", "<api-key>")
  .header("API-Sign", "<api-key>")
  .header("API-Nonce", "<api-key>")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.sandbox.services.payward.com/v1/ramp/countries")

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

request = Net::HTTP::Get.new(url)
request["API-Key"] = '<api-key>'
request["API-Sign"] = '<api-key>'
request["API-Nonce"] = '<api-key>'

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

{
  "data": [
    {
      "country": "GB"
    },
    {
      "country": "DE"
    },
    {
      "country": "US",
      "subdivisions": [
        "CA",
        "NY",
        "TX",
        "FL",
        "WA"
      ]
    },
    {
      "country": "CA",
      "subdivisions": [
        "ON",
        "BC",
        "QC"
      ]
    }
  ],
  "next_page_token": "MjoyRHuBXSgoe0mDHt-iFALROW46EGdvk_trgja31Vwr7H4"
}

{
  "error": {
    "type": "validation_error",
    "status": 400,
    "instance": "req_123",
    "code": "bad_request"
  }
}

{
  "error": {
    "type": "authentication_error",
    "status": 401,
    "instance": "req_123",
    "code": "unauthenticated"
  }
}

{
  "error": {
    "type": "authorization_error",
    "status": 403,
    "instance": "req_123",
    "code": "forbidden"
  }
}

{
  "error": {
    "type": "rate_limit_error",
    "status": 429,
    "instance": "req_123",
    "code": "resource_exhausted"
  }
}

{
  "error": {
    "type": "internal_error",
    "status": 500,
    "instance": "req_123",
    "code": "internal"
  }
}

{
  "error": {
    "type": "api_error",
    "status": 501,
    "instance": "req_123",
    "code": "unimplemented"
  }
}

{
  "error": {
    "type": "service_error",
    "status": 503,
    "instance": "req_123",
    "code": "unavailable"
  }
}

{
  "error": {
    "type": "service_error",
    "status": 504,
    "instance": "req_123",
    "code": "deadline_exceeded"
  }
}