curl --request POST \
  --url https://api.salesbricks.com/api/v2/subscriptions/{subscription_id}/upgrade/estimate \
  --header 'Content-Type: application/json' \
  --header 'X-SALESBRICKS-KEY: <api-key>' \
  --data '
{
  "starts_at": "2023-12-25",
  "bricks": [
    {
      "brick_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "quantity": 123,
      "discount": [
        {
          "rate": "<string>",
          "amount": 123,
          "renews": false
        }
      ]
    }
  ],
  "plan_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "discount_coupons": [
    "<string>"
  ]
}
'

import requests

url = "https://api.salesbricks.com/api/v2/subscriptions/{subscription_id}/upgrade/estimate"

payload = {
    "starts_at": "2023-12-25",
    "bricks": [
        {
            "brick_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
            "quantity": 123,
            "discount": [
                {
                    "rate": "<string>",
                    "amount": 123,
                    "renews": False
                }
            ]
        }
    ],
    "plan_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "discount_coupons": ["<string>"]
}
headers = {
    "X-SALESBRICKS-KEY": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-SALESBRICKS-KEY': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    starts_at: '2023-12-25',
    bricks: [
      {
        brick_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
        quantity: 123,
        discount: [{rate: '<string>', amount: 123, renews: false}]
      }
    ],
    plan_id: '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    discount_coupons: ['<string>']
  })
};

fetch('https://api.salesbricks.com/api/v2/subscriptions/{subscription_id}/upgrade/estimate', 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.salesbricks.com/api/v2/subscriptions/{subscription_id}/upgrade/estimate",
  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([
    'starts_at' => '2023-12-25',
    'bricks' => [
        [
                'brick_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
                'quantity' => 123,
                'discount' => [
                                [
                                                                'rate' => '<string>',
                                                                'amount' => 123,
                                                                'renews' => false
                                ]
                ]
        ]
    ],
    'plan_id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a',
    'discount_coupons' => [
        '<string>'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-SALESBRICKS-KEY: <api-key>"
  ],
]);

$response = curl_exec($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.salesbricks.com/api/v2/subscriptions/{subscription_id}/upgrade/estimate"

	payload := strings.NewReader("{\n  \"starts_at\": \"2023-12-25\",\n  \"bricks\": [\n    {\n      \"brick_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n      \"quantity\": 123,\n      \"discount\": [\n        {\n          \"rate\": \"<string>\",\n          \"amount\": 123,\n          \"renews\": false\n        }\n      ]\n    }\n  ],\n  \"plan_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"discount_coupons\": [\n    \"<string>\"\n  ]\n}")

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

	req.Header.Add("X-SALESBRICKS-KEY", "<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.salesbricks.com/api/v2/subscriptions/{subscription_id}/upgrade/estimate")
  .header("X-SALESBRICKS-KEY", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"starts_at\": \"2023-12-25\",\n  \"bricks\": [\n    {\n      \"brick_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n      \"quantity\": 123,\n      \"discount\": [\n        {\n          \"rate\": \"<string>\",\n          \"amount\": 123,\n          \"renews\": false\n        }\n      ]\n    }\n  ],\n  \"plan_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"discount_coupons\": [\n    \"<string>\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.salesbricks.com/api/v2/subscriptions/{subscription_id}/upgrade/estimate")

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

request = Net::HTTP::Post.new(url)
request["X-SALESBRICKS-KEY"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"starts_at\": \"2023-12-25\",\n  \"bricks\": [\n    {\n      \"brick_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n      \"quantity\": 123,\n      \"discount\": [\n        {\n          \"rate\": \"<string>\",\n          \"amount\": 123,\n          \"renews\": false\n        }\n      ]\n    }\n  ],\n  \"plan_id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\",\n  \"discount_coupons\": [\n    \"<string>\"\n  ]\n}"

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

{
  "ends_at": "2023-12-25",
  "sub_total": 123,
  "grand_total": 123,
  "line_items": [
    {
      "quantity": 123,
      "brick_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "brick_name": "<string>",
      "sub_total": 123,
      "plan_id": "<string>",
      "plan_name": "<string>",
      "grand_total": "<string>",
      "grand_total_details": "<string>",
      "tiers_breakdown": [
        {
          "quantity": 0,
          "unit_price": "<string>",
          "sub_total": "<string>",
          "duration_text": "<string>"
        }
      ],
      "pre_commitment_schedule": "<string>",
      "discount": [
        {
          "rate": "<string>",
          "amount": 123,
          "renews": false
        }
      ]
    }
  ],
  "billing_schedule": [
    {
      "starts_at": "<string>",
      "ends_at": "<string>",
      "sub_total": 123,
      "grand_total": "<string>",
      "grand_total_details": "<string>"
    }
  ],
  "grand_total_details": "<unknown>"
}

{
  "error": {
    "code": "ERR_BAD_REQUEST",
    "message": "Bad request — the input payload is malformed, missing required fields, or contains invalid data."
  }
}

{
  "error": {
    "code": "ERR_NOT_FOUND",
    "message": "Not found — the resource you are looking for does not exist."
  }
}