curl --request GET \
  --url https://api.chift.eu/consumers/{consumer_id}/invoicing/contacts

import requests

url = "https://api.chift.eu/consumers/{consumer_id}/invoicing/contacts"

response = requests.get(url)

print(response.text)

const options = {method: 'GET'};

fetch('https://api.chift.eu/consumers/{consumer_id}/invoicing/contacts', 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.chift.eu/consumers/{consumer_id}/invoicing/contacts",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

$response = curl_exec($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.chift.eu/consumers/{consumer_id}/invoicing/contacts"

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

	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.chift.eu/consumers/{consumer_id}/invoicing/contacts")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.chift.eu/consumers/{consumer_id}/invoicing/contacts")

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

request = Net::HTTP::Get.new(url)

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

{
  "items": [
    {
      "id": "<this-id>",
      "source_ref": {
        "id": "<target-software-id>",
        "model": "invoice"
      },
      "is_prospect": true,
      "is_customer": true,
      "is_supplier": true,
      "is_company": true,
      "company_name": "Example Company S.A.",
      "first_name": "John",
      "last_name": "Doe",
      "email": "john.doe@example.com",
      "phone": "+32 2 000 00 00",
      "mobile": "+32 4 000 00 00",
      "company_id": "<invoicing-company-id>",
      "vat": "BE0000000000",
      "company_number": "0000000000",
      "currency": "EUR",
      "language": "en",
      "comment": "Preferred contact: accounts payable team.",
      "customer_account_number": "<invoicing-account-number>",
      "supplier_account_number": "<invoicing-account-number>",
      "birthdate": "1990-01-01",
      "gender": "H",
      "addresses": [],
      "external_reference": "CONTACT-0001"
    }
  ],
  "total": 1,
  "page": 2,
  "size": 2
}

{
  "message": "Error while trying to perform your request",
  "status": "error"
}

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