curl --request POST \
  --url https://api.example.com/v1/organizations/{organization_id}/projects/{project_id}/compute/instances/order-preview \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "size_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "location_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "image_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "",
  "volume_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "ssh_keys": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ],
  "install_management_key": true,
  "vpc_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "project_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "tags": [
    "<string>"
  ],
  "one_click_apps": [
    {
      "slug": "<string>",
      "parameters": {}
    }
  ],
  "control_panel": "<string>",
  "addon_ids": [
    "<string>"
  ],
  "accepted_contract_ids": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ]
}
'

import requests

url = "https://api.example.com/v1/organizations/{organization_id}/projects/{project_id}/compute/instances/order-preview"

payload = {
    "size_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "location_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "image_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "name": "",
    "volume_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "ssh_keys": ["3c90c3cc-0d44-4b50-8888-8dd25736052a"],
    "install_management_key": True,
    "vpc_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "project_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "tags": ["<string>"],
    "one_click_apps": [
        {
            "slug": "<string>",
            "parameters": {}
        }
    ],
    "control_panel": "<string>",
    "addon_ids": ["<string>"],
    "accepted_contract_ids": ["3c90c3cc-0d44-4b50-8888-8dd25736052a"]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    size_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    location_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    image_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    name: '',
    volume_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    ssh_keys: ['3c90c3cc-0d44-4b50-8888-8dd25736052a'],
    install_management_key: true,
    vpc_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    project_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    tags: ['<string>'],
    one_click_apps: [{slug: '<string>', parameters: {}}],
    control_panel: '<string>',
    addon_ids: ['<string>'],
    accepted_contract_ids: ['3c90c3cc-0d44-4b50-8888-8dd25736052a']
  })
};

fetch('https://api.example.com/v1/organizations/{organization_id}/projects/{project_id}/compute/instances/order-preview', 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.example.com/v1/organizations/{organization_id}/projects/{project_id}/compute/instances/order-preview",
  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([
    'size_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'location_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'image_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'name' => '',
    'volume_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'ssh_keys' => [
        '3c90c3cc-0d44-4b50-8888-8dd25736052a'
    ],
    'install_management_key' => true,
    'vpc_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'project_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'tags' => [
        '<string>'
    ],
    'one_click_apps' => [
        [
                'slug' => '<string>',
                'parameters' => [
                                
                ]
        ]
    ],
    'control_panel' => '<string>',
    'addon_ids' => [
        '<string>'
    ],
    'accepted_contract_ids' => [
        '3c90c3cc-0d44-4b50-8888-8dd25736052a'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "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.example.com/v1/organizations/{organization_id}/projects/{project_id}/compute/instances/order-preview"

	payload := strings.NewReader("{\n  \"size_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"location_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"image_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"name\": \"\",\n  \"volume_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"ssh_keys\": [\n    \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n  ],\n  \"install_management_key\": true,\n  \"vpc_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"project_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"tags\": [\n    \"<string>\"\n  ],\n  \"one_click_apps\": [\n    {\n      \"slug\": \"<string>\",\n      \"parameters\": {}\n    }\n  ],\n  \"control_panel\": \"<string>\",\n  \"addon_ids\": [\n    \"<string>\"\n  ],\n  \"accepted_contract_ids\": [\n    \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n  ]\n}")

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

	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.post("https://api.example.com/v1/organizations/{organization_id}/projects/{project_id}/compute/instances/order-preview")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"size_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"location_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"image_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"name\": \"\",\n  \"volume_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"ssh_keys\": [\n    \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n  ],\n  \"install_management_key\": true,\n  \"vpc_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"project_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"tags\": [\n    \"<string>\"\n  ],\n  \"one_click_apps\": [\n    {\n      \"slug\": \"<string>\",\n      \"parameters\": {}\n    }\n  ],\n  \"control_panel\": \"<string>\",\n  \"addon_ids\": [\n    \"<string>\"\n  ],\n  \"accepted_contract_ids\": [\n    \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.example.com/v1/organizations/{organization_id}/projects/{project_id}/compute/instances/order-preview")

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'
request.body = "{\n  \"size_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"location_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"image_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"name\": \"\",\n  \"volume_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"ssh_keys\": [\n    \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n  ],\n  \"install_management_key\": true,\n  \"vpc_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"project_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"tags\": [\n    \"<string>\"\n  ],\n  \"one_click_apps\": [\n    {\n      \"slug\": \"<string>\",\n      \"parameters\": {}\n    }\n  ],\n  \"control_panel\": \"<string>\",\n  \"addon_ids\": [\n    \"<string>\"\n  ],\n  \"accepted_contract_ids\": [\n    \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n  ]\n}"

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