curl --request POST \
  --url https://{workspace}.spreesuite.com/billspree/tariffs/create-tariff \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "method": "Create",
  "action": "Create Plan",
  "apiVersion": "v2",
  "tariff": {
    "serviceCode": "DEMO-001",
    "code": "DemoPlan",
    "name": "Demo Plan",
    "uniqueLabel": "DemoPlan",
    "description": null,
    "parentTariffCode": null,
    "planType": "BASE_PLAN",
    "chargeType": "Postpaid",
    "abstract": 0,
    "custom": 1,
    "visibility": "Public",
    "billingPeriodID": null,
    "valueFormulas": [],
    "componentRules": [],
    "usageData": [],
    "securityAttributes": []
  }
}
'

import requests

url = "https://{workspace}.spreesuite.com/billspree/tariffs/create-tariff"

payload = {
    "method": "Create",
    "action": "Create Plan",
    "apiVersion": "v2",
    "tariff": {
        "serviceCode": "DEMO-001",
        "code": "DemoPlan",
        "name": "Demo Plan",
        "uniqueLabel": "DemoPlan",
        "description": None,
        "parentTariffCode": None,
        "planType": "BASE_PLAN",
        "chargeType": "Postpaid",
        "abstract": 0,
        "custom": 1,
        "visibility": "Public",
        "billingPeriodID": None,
        "valueFormulas": [],
        "componentRules": [],
        "usageData": [],
        "securityAttributes": []
    }
}
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    method: 'Create',
    action: 'Create Plan',
    apiVersion: 'v2',
    tariff: {
      serviceCode: 'DEMO-001',
      code: 'DemoPlan',
      name: 'Demo Plan',
      uniqueLabel: 'DemoPlan',
      description: null,
      parentTariffCode: null,
      planType: 'BASE_PLAN',
      chargeType: 'Postpaid',
      abstract: 0,
      custom: 1,
      visibility: 'Public',
      billingPeriodID: null,
      valueFormulas: [],
      componentRules: [],
      usageData: [],
      securityAttributes: []
    }
  })
};

fetch('https://{workspace}.spreesuite.com/billspree/tariffs/create-tariff', 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://{workspace}.spreesuite.com/billspree/tariffs/create-tariff",
  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([
    'method' => 'Create',
    'action' => 'Create Plan',
    'apiVersion' => 'v2',
    'tariff' => [
        'serviceCode' => 'DEMO-001',
        'code' => 'DemoPlan',
        'name' => 'Demo Plan',
        'uniqueLabel' => 'DemoPlan',
        'description' => null,
        'parentTariffCode' => null,
        'planType' => 'BASE_PLAN',
        'chargeType' => 'Postpaid',
        'abstract' => 0,
        'custom' => 1,
        'visibility' => 'Public',
        'billingPeriodID' => null,
        'valueFormulas' => [
                
        ],
        'componentRules' => [
                
        ],
        'usageData' => [
                
        ],
        'securityAttributes' => [
                
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "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://{workspace}.spreesuite.com/billspree/tariffs/create-tariff"

	payload := strings.NewReader("{\n  \"method\": \"Create\",\n  \"action\": \"Create Plan\",\n  \"apiVersion\": \"v2\",\n  \"tariff\": {\n    \"serviceCode\": \"DEMO-001\",\n    \"code\": \"DemoPlan\",\n    \"name\": \"Demo Plan\",\n    \"uniqueLabel\": \"DemoPlan\",\n    \"description\": null,\n    \"parentTariffCode\": null,\n    \"planType\": \"BASE_PLAN\",\n    \"chargeType\": \"Postpaid\",\n    \"abstract\": 0,\n    \"custom\": 1,\n    \"visibility\": \"Public\",\n    \"billingPeriodID\": null,\n    \"valueFormulas\": [],\n    \"componentRules\": [],\n    \"usageData\": [],\n    \"securityAttributes\": []\n  }\n}")

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

	req.Header.Add("Authorization", "<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://{workspace}.spreesuite.com/billspree/tariffs/create-tariff")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"method\": \"Create\",\n  \"action\": \"Create Plan\",\n  \"apiVersion\": \"v2\",\n  \"tariff\": {\n    \"serviceCode\": \"DEMO-001\",\n    \"code\": \"DemoPlan\",\n    \"name\": \"Demo Plan\",\n    \"uniqueLabel\": \"DemoPlan\",\n    \"description\": null,\n    \"parentTariffCode\": null,\n    \"planType\": \"BASE_PLAN\",\n    \"chargeType\": \"Postpaid\",\n    \"abstract\": 0,\n    \"custom\": 1,\n    \"visibility\": \"Public\",\n    \"billingPeriodID\": null,\n    \"valueFormulas\": [],\n    \"componentRules\": [],\n    \"usageData\": [],\n    \"securityAttributes\": []\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{workspace}.spreesuite.com/billspree/tariffs/create-tariff")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"method\": \"Create\",\n  \"action\": \"Create Plan\",\n  \"apiVersion\": \"v2\",\n  \"tariff\": {\n    \"serviceCode\": \"DEMO-001\",\n    \"code\": \"DemoPlan\",\n    \"name\": \"Demo Plan\",\n    \"uniqueLabel\": \"DemoPlan\",\n    \"description\": null,\n    \"parentTariffCode\": null,\n    \"planType\": \"BASE_PLAN\",\n    \"chargeType\": \"Postpaid\",\n    \"abstract\": 0,\n    \"custom\": 1,\n    \"visibility\": \"Public\",\n    \"billingPeriodID\": null,\n    \"valueFormulas\": [],\n    \"componentRules\": [],\n    \"usageData\": [],\n    \"securityAttributes\": []\n  }\n}"

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

{
  "success": true,
  "statusCode": 200,
  "message": "Request Succeeded.",
  "error": null,
  "data": {}
}