curl --request PATCH \
  --url https://api.jtl-cloud.com/erp/items/{itemId}/specialprices \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'x-tenant-id: <x-tenant-id>' \
  --data '
{
  "IsActive": true,
  "SpecialPrice": [
    {
      "IsActive": true,
      "CustomerGroupId": 123,
      "NetPrice": 126.04,
      "SalesChannelId": "1-1-1"
    }
  ],
  "StartDate": "2023-02-01T13:00:00.0000000+00:00",
  "EndDateActive": false,
  "EndDate": "2023-02-01T13:00:00.0000000+00:00",
  "TillAmountActive": false,
  "TillAmountInStockSmallerThan": 15
}
'

import requests

url = "https://api.jtl-cloud.com/erp/items/{itemId}/specialprices"

payload = {
    "IsActive": True,
    "SpecialPrice": [
        {
            "IsActive": True,
            "CustomerGroupId": 123,
            "NetPrice": 126.04,
            "SalesChannelId": "1-1-1"
        }
    ],
    "StartDate": "2023-02-01T13:00:00.0000000+00:00",
    "EndDateActive": False,
    "EndDate": "2023-02-01T13:00:00.0000000+00:00",
    "TillAmountActive": False,
    "TillAmountInStockSmallerThan": 15
}
headers = {
    "x-tenant-id": "<x-tenant-id>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {
    'x-tenant-id': '<x-tenant-id>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    IsActive: true,
    SpecialPrice: [
      {
        IsActive: true,
        CustomerGroupId: 123,
        NetPrice: 126.04,
        SalesChannelId: '1-1-1'
      }
    ],
    StartDate: '2023-02-01T13:00:00.0000000+00:00',
    EndDateActive: false,
    EndDate: '2023-02-01T13:00:00.0000000+00:00',
    TillAmountActive: false,
    TillAmountInStockSmallerThan: 15
  })
};

fetch('https://api.jtl-cloud.com/erp/items/{itemId}/specialprices', 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.jtl-cloud.com/erp/items/{itemId}/specialprices",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'IsActive' => true,
    'SpecialPrice' => [
        [
                'IsActive' => true,
                'CustomerGroupId' => 123,
                'NetPrice' => 126.04,
                'SalesChannelId' => '1-1-1'
        ]
    ],
    'StartDate' => '2023-02-01T13:00:00.0000000+00:00',
    'EndDateActive' => false,
    'EndDate' => '2023-02-01T13:00:00.0000000+00:00',
    'TillAmountActive' => false,
    'TillAmountInStockSmallerThan' => 15
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "x-tenant-id: <x-tenant-id>"
  ],
]);

$response = curl_exec($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.jtl-cloud.com/erp/items/{itemId}/specialprices"

	payload := strings.NewReader("{\n  \"IsActive\": true,\n  \"SpecialPrice\": [\n    {\n      \"IsActive\": true,\n      \"CustomerGroupId\": 123,\n      \"NetPrice\": 126.04,\n      \"SalesChannelId\": \"1-1-1\"\n    }\n  ],\n  \"StartDate\": \"2023-02-01T13:00:00.0000000+00:00\",\n  \"EndDateActive\": false,\n  \"EndDate\": \"2023-02-01T13:00:00.0000000+00:00\",\n  \"TillAmountActive\": false,\n  \"TillAmountInStockSmallerThan\": 15\n}")

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

	req.Header.Add("x-tenant-id", "<x-tenant-id>")
	req.Header.Add("Authorization", "Bearer <token>")
	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.patch("https://api.jtl-cloud.com/erp/items/{itemId}/specialprices")
  .header("x-tenant-id", "<x-tenant-id>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"IsActive\": true,\n  \"SpecialPrice\": [\n    {\n      \"IsActive\": true,\n      \"CustomerGroupId\": 123,\n      \"NetPrice\": 126.04,\n      \"SalesChannelId\": \"1-1-1\"\n    }\n  ],\n  \"StartDate\": \"2023-02-01T13:00:00.0000000+00:00\",\n  \"EndDateActive\": false,\n  \"EndDate\": \"2023-02-01T13:00:00.0000000+00:00\",\n  \"TillAmountActive\": false,\n  \"TillAmountInStockSmallerThan\": 15\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.jtl-cloud.com/erp/items/{itemId}/specialprices")

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

request = Net::HTTP::Patch.new(url)
request["x-tenant-id"] = '<x-tenant-id>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"IsActive\": true,\n  \"SpecialPrice\": [\n    {\n      \"IsActive\": true,\n      \"CustomerGroupId\": 123,\n      \"NetPrice\": 126.04,\n      \"SalesChannelId\": \"1-1-1\"\n    }\n  ],\n  \"StartDate\": \"2023-02-01T13:00:00.0000000+00:00\",\n  \"EndDateActive\": false,\n  \"EndDate\": \"2023-02-01T13:00:00.0000000+00:00\",\n  \"TillAmountActive\": false,\n  \"TillAmountInStockSmallerThan\": 15\n}"

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

{
  "ErrorCode": "<string>",
  "ValidationErrors": {},
  "Errors": {},
  "ErrorMessage": "<string>",
  "Stacktrace": "<string>"
}

{
  "ErrorCode": "<string>",
  "ValidationErrors": {},
  "Errors": {},
  "ErrorMessage": "<string>",
  "Stacktrace": "<string>"
}