curl --request PATCH \
  --url https://{defaultHost}/v1/subscription_protocol \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "subscription_protocol": {
    "downgrade_behavior": "immediate"
  }
}
'

import requests

url = "https://{defaultHost}/v1/subscription_protocol"

payload = { "subscription_protocol": { "downgrade_behavior": "immediate" } }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({subscription_protocol: {downgrade_behavior: 'immediate'}})
};

fetch('https://{defaultHost}/v1/subscription_protocol', 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}/v1/subscription_protocol",
  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([
    'subscription_protocol' => [
        'downgrade_behavior' => 'immediate'
    ]
  ]),
  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}/v1/subscription_protocol"

	payload := strings.NewReader("{\n  \"subscription_protocol\": {\n    \"downgrade_behavior\": \"immediate\"\n  }\n}")

	req, _ := http.NewRequest("PATCH", 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.patch("https://{defaultHost}/v1/subscription_protocol")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"subscription_protocol\": {\n    \"downgrade_behavior\": \"immediate\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{defaultHost}/v1/subscription_protocol")

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

request = Net::HTTP::Patch.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"subscription_protocol\": {\n    \"downgrade_behavior\": \"immediate\"\n  }\n}"

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

{
  "id": "aec98fa6-751d-4ff1-87b7-2c967e9047c8",
  "object": "subscription_protocol",
  "bypass_duplicate_trials": false,
  "cancel_behavior": "pending",
  "cancel_window_enabled": false,
  "cancel_window_days": 14,
  "default_payment_method_detach_enabled": false,
  "default_payment_method_fallback_enabled": true,
  "downgrade_behavior": "immediate",
  "payment_retry_window_weeks": 1,
  "preservation_enabled": false,
  "preservation_locales": {
    "reasons_title": "We're sad to see you go",
    "reasons_description": "Before you cancel, please let us know the reason you're leaving.",
    "skip_link": "Never mind, I don't want to cancel.",
    "preserve_title": "Take {{ amount }} off your next payment?",
    "preserve_description": "We'd be happy to offer you  {{ amount }} off your next payment if you'd stay with us.",
    "preserve_button": "Yes, I'll take it.",
    "cancel_link": "No thanks, I'd still like to cancel."
  },
  "remind_at_period_percent_remaining": 10,
  "remind_after_days": null,
  "require_upfront_payment_method": true,
  "revoke_purchases_on_past_due": false,
  "upgrade_behavior": "immediate",
  "preservation_coupon": "f70c396f-ab41-4af4-a46e-a6f68d45ac4c",
  "created_at": 1793797005,
  "updated_at": 1793797005
}