curl --request POST \
  --url https://api.riskportal.activeviam.com/api/Counterparties/CreateCounterparties \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json-patch+json' \
  --data '
{
  "$type": "Derivitec.Core.Mediators.Upload.Counterparties.CounterpartyCreateRequest, Derivitec.Core.Mediators"
}
'

import requests

url = "https://api.riskportal.activeviam.com/api/Counterparties/CreateCounterparties"

payload = { "$type": "Derivitec.Core.Mediators.Upload.Counterparties.CounterpartyCreateRequest, Derivitec.Core.Mediators" }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json-patch+json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json-patch+json'},
  body: JSON.stringify({
    $type: 'Derivitec.Core.Mediators.Upload.Counterparties.CounterpartyCreateRequest, Derivitec.Core.Mediators'
  })
};

fetch('https://api.riskportal.activeviam.com/api/Counterparties/CreateCounterparties', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.riskportal.activeviam.com/api/Counterparties/CreateCounterparties",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    '$type' => 'Derivitec.Core.Mediators.Upload.Counterparties.CounterpartyCreateRequest, Derivitec.Core.Mediators'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json-patch+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.riskportal.activeviam.com/api/Counterparties/CreateCounterparties"

	payload := strings.NewReader("{\n  \"$type\": \"Derivitec.Core.Mediators.Upload.Counterparties.CounterpartyCreateRequest, Derivitec.Core.Mediators\"\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json-patch+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.riskportal.activeviam.com/api/Counterparties/CreateCounterparties")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json-patch+json")
  .body("{\n  \"$type\": \"Derivitec.Core.Mediators.Upload.Counterparties.CounterpartyCreateRequest, Derivitec.Core.Mediators\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.riskportal.activeviam.com/api/Counterparties/CreateCounterparties")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json-patch+json'
request.body = "{\n  \"$type\": \"Derivitec.Core.Mediators.Upload.Counterparties.CounterpartyCreateRequest, Derivitec.Core.Mediators\"\n}"

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

{
  "$type": "Derivitec.Core.Mediators.Upload.Counterparties.CounterpartyCreateResponse, Derivitec.Core.Mediators",
  "is_success": true,
  "error_messages": [
    "<string>"
  ]
}

{
  "type": "<string>",
  "title": "<string>",
  "status": 123,
  "detail": "<string>",
  "instance": "<string>"
}

{
  "type": "<string>",
  "title": "<string>",
  "status": 123,
  "detail": "<string>",
  "instance": "<string>"
}