curl --request POST \
  --url https://{defaultHost}/checkout_configurations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "company_id": "biz_xxxxxxxxxxxxxx",
  "plan_id": "plan_xxxxxxxxxxxxx"
}
'

import requests

url = "https://{defaultHost}/checkout_configurations"

payload = {
    "company_id": "biz_xxxxxxxxxxxxxx",
    "plan_id": "plan_xxxxxxxxxxxxx"
}
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({company_id: 'biz_xxxxxxxxxxxxxx', plan_id: 'plan_xxxxxxxxxxxxx'})
};

fetch('https://{defaultHost}/checkout_configurations', 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://{defaultHost}/checkout_configurations",
  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([
    'company_id' => 'biz_xxxxxxxxxxxxxx',
    'plan_id' => 'plan_xxxxxxxxxxxxx'
  ]),
  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://{defaultHost}/checkout_configurations"

	payload := strings.NewReader("{\n  \"company_id\": \"biz_xxxxxxxxxxxxxx\",\n  \"plan_id\": \"plan_xxxxxxxxxxxxx\"\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://{defaultHost}/checkout_configurations")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"company_id\": \"biz_xxxxxxxxxxxxxx\",\n  \"plan_id\": \"plan_xxxxxxxxxxxxx\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{defaultHost}/checkout_configurations")

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  \"company_id\": \"biz_xxxxxxxxxxxxxx\",\n  \"plan_id\": \"plan_xxxxxxxxxxxxx\"\n}"

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

{
  "id": "<string>",
  "created_at": "<string>",
  "updated_at": "<string>",
  "company_id": "<string>",
  "currency": "<string>",
  "plan": {
    "id": "<string>",
    "visibility": "<string>",
    "plan_type": "<string>",
    "release_method": "<string>",
    "currency": "<string>",
    "billing_period": 123,
    "expiration_days": 123,
    "initial_price": 123,
    "renewal_price": 123,
    "trial_period_days": 123,
    "three_ds_level": "<string>",
    "adaptive_pricing_enabled": true
  },
  "affiliate_code": "<string>",
  "metadata": {},
  "redirect_url": "<string>",
  "purchase_url": "<string>",
  "three_ds_level": "<string>",
  "payment_method_configuration": {
    "enabled": [
      "<string>"
    ],
    "disabled": [
      "<string>"
    ],
    "include_platform_defaults": true
  }
}

{
  "error": {
    "type": "<string>",
    "message": "<string>"
  }
}