curl --request POST \
  --url https://api.valuechecker.net/client_reference/{client_reference_id}/appraisal \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "client_id": "10",
  "client_reference_id": "200",
  "cpid": "123456",
  "rpid": "234567",
  "homepage_client_category_id": 2740,
  "selected_client_category_id": 2740,
  "item_quantity": 1,
  "is_price_per_item": true,
  "rp_name_cart": "A product name",
  "offer_id": "9876",
  "shop_name": "A shop name",
  "shop_url": "https://some.shop",
  "replacement_cost_value": 300,
  "rp_price_date": "2021-02-17 13:36:10"
}
'

import requests

url = "https://api.valuechecker.net/client_reference/{client_reference_id}/appraisal"

payload = {
    "client_id": "10",
    "client_reference_id": "200",
    "cpid": "123456",
    "rpid": "234567",
    "homepage_client_category_id": 2740,
    "selected_client_category_id": 2740,
    "item_quantity": 1,
    "is_price_per_item": True,
    "rp_name_cart": "A product name",
    "offer_id": "9876",
    "shop_name": "A shop name",
    "shop_url": "https://some.shop",
    "replacement_cost_value": 300,
    "rp_price_date": "2021-02-17 13:36:10"
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    client_id: '10',
    client_reference_id: '200',
    cpid: '123456',
    rpid: '234567',
    homepage_client_category_id: 2740,
    selected_client_category_id: 2740,
    item_quantity: 1,
    is_price_per_item: true,
    rp_name_cart: 'A product name',
    offer_id: '9876',
    shop_name: 'A shop name',
    shop_url: 'https://some.shop',
    replacement_cost_value: 300,
    rp_price_date: '2021-02-17 13:36:10'
  })
};

fetch('https://api.valuechecker.net/client_reference/{client_reference_id}/appraisal', 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.valuechecker.net/client_reference/{client_reference_id}/appraisal",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'client_id' => '10',
    'client_reference_id' => '200',
    'cpid' => '123456',
    'rpid' => '234567',
    'homepage_client_category_id' => 2740,
    'selected_client_category_id' => 2740,
    'item_quantity' => 1,
    'is_price_per_item' => true,
    'rp_name_cart' => 'A product name',
    'offer_id' => '9876',
    'shop_name' => 'A shop name',
    'shop_url' => 'https://some.shop',
    'replacement_cost_value' => 300,
    'rp_price_date' => '2021-02-17 13:36:10'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "Content-Type: application/json"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.valuechecker.net/client_reference/{client_reference_id}/appraisal"

	payload := strings.NewReader("{\n  \"client_id\": \"10\",\n  \"client_reference_id\": \"200\",\n  \"cpid\": \"123456\",\n  \"rpid\": \"234567\",\n  \"homepage_client_category_id\": 2740,\n  \"selected_client_category_id\": 2740,\n  \"item_quantity\": 1,\n  \"is_price_per_item\": true,\n  \"rp_name_cart\": \"A product name\",\n  \"offer_id\": \"9876\",\n  \"shop_name\": \"A shop name\",\n  \"shop_url\": \"https://some.shop\",\n  \"replacement_cost_value\": 300,\n  \"rp_price_date\": \"2021-02-17 13:36:10\"\n}")

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

	req.Header.Add("Authorization", "<api-key>")
	req.Header.Add("Content-Type", "application/json")

	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.valuechecker.net/client_reference/{client_reference_id}/appraisal")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"client_id\": \"10\",\n  \"client_reference_id\": \"200\",\n  \"cpid\": \"123456\",\n  \"rpid\": \"234567\",\n  \"homepage_client_category_id\": 2740,\n  \"selected_client_category_id\": 2740,\n  \"item_quantity\": 1,\n  \"is_price_per_item\": true,\n  \"rp_name_cart\": \"A product name\",\n  \"offer_id\": \"9876\",\n  \"shop_name\": \"A shop name\",\n  \"shop_url\": \"https://some.shop\",\n  \"replacement_cost_value\": 300,\n  \"rp_price_date\": \"2021-02-17 13:36:10\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.valuechecker.net/client_reference/{client_reference_id}/appraisal")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"client_id\": \"10\",\n  \"client_reference_id\": \"200\",\n  \"cpid\": \"123456\",\n  \"rpid\": \"234567\",\n  \"homepage_client_category_id\": 2740,\n  \"selected_client_category_id\": 2740,\n  \"item_quantity\": 1,\n  \"is_price_per_item\": true,\n  \"rp_name_cart\": \"A product name\",\n  \"offer_id\": \"9876\",\n  \"shop_name\": \"A shop name\",\n  \"shop_url\": \"https://some.shop\",\n  \"replacement_cost_value\": 300,\n  \"rp_price_date\": \"2021-02-17 13:36:10\"\n}"

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

{
  "appraisal_id": 97771
}

{
  "error": "cpid : field required; rpid : field required",
  "event_code": "ERMPAP",
  "event_dict": {
    "event_severity": "ERROR",
    "title": "Missing parameter",
    "description": "The \"cpid\" parameter is required."
  }
}

{
  "error": "Invalid Authorization header",
  "event_code": "ERIT00",
  "event_dict": {
    "event_severity": "ERROR",
    "title": "Invalid Authorization header",
    "description": "Please provide the right authorization token"
  }
}

{
  "error": "Client reference 14418 was not found",
  "event_code": "ERNFAP",
  "event_dict": {
    "event_severity": "ERROR",
    "title": "Wrong \"client_reference_id\" value",
    "description": "The client_reference_id \"14418\" was not found"
  }
}