curl --request POST \
  --url https://api.creptapay.com/v1/subscriptions/{subscriptionId}/cancel \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "at_period_end": true,
  "reason": "<string>"
}
'

import requests

url = "https://api.creptapay.com/v1/subscriptions/{subscriptionId}/cancel"

payload = {
    "at_period_end": True,
    "reason": "<string>"
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({at_period_end: true, reason: '<string>'})
};

fetch('https://api.creptapay.com/v1/subscriptions/{subscriptionId}/cancel', 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.creptapay.com/v1/subscriptions/{subscriptionId}/cancel",
  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([
    'at_period_end' => true,
    'reason' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-api-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.creptapay.com/v1/subscriptions/{subscriptionId}/cancel"

	payload := strings.NewReader("{\n  \"at_period_end\": true,\n  \"reason\": \"<string>\"\n}")

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

	req.Header.Add("x-api-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.creptapay.com/v1/subscriptions/{subscriptionId}/cancel")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"at_period_end\": true,\n  \"reason\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.creptapay.com/v1/subscriptions/{subscriptionId}/cancel")

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

request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"at_period_end\": true,\n  \"reason\": \"<string>\"\n}"

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

{
  "message": "Subscription will end when the current period does",
  "data": {
    "id": "6713a2b4c8d5e3f2a1b9c4e2",
    "reference": "SUB-K3F9A2QP",
    "status": "active",
    "collection_mode": "invoice",
    "checkout_url": "https://pay.creptapay.com/SUB-K3F9A2QP",
    "amount_due": {
      "amount": 49,
      "currency": "USD"
    },
    "terms": {
      "amount": 49,
      "currency": "USD",
      "interval": "month",
      "interval_count": 1,
      "grace_days": 7,
      "allowed_currencies": [
        "USDC"
      ],
      "captured_at": "2026-01-15T09:22:11.000Z"
    },
    "on_legacy_terms": false,
    "plan": {
      "id": "6712f0a1b9c4e2d3f4a5b6c7",
      "name": "Pro monthly",
      "amount": 49,
      "currency": "USD",
      "interval": "month",
      "interval_count": 1,
      "grace_days": 7
    },
    "customer": {
      "id": "60d0fe4f5311236168a109c9",
      "name": "Chidera Okonkwo",
      "email": "chidera@example.com"
    },
    "current_period_start": "2026-02-15T09:22:11.000Z",
    "current_period_end": "2026-03-15T09:22:11.000Z",
    "next_billing_at": "2026-03-15T09:22:11.000Z",
    "grace_ends_at": "2026-03-22T09:22:11.000Z",
    "trial_ends_at": null,
    "cancel_at_period_end": true,
    "canceled_at": null,
    "cancel_reason": null,
    "latest_payment": {
      "id": "60d0fe4f5311236168a109cb",
      "reference": "CP-B2C3D4E5F6",
      "status": "paid",
      "amount": 49,
      "currency": "USD",
      "crypto_currency": "USDC",
      "network": "BASE",
      "tx_hash": "0xabcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890",
      "billing_period_start": "2026-02-15T09:22:11.000Z",
      "billing_period_end": "2026-03-15T09:22:11.000Z",
      "createdAt": "2026-02-15T09:20:02.000Z"
    },
    "payments_count": 2,
    "failed_attempts": 0,
    "last_failure_reason": null,
    "metadata": null,
    "createdAt": "2026-01-15T09:22:11.000Z",
    "updatedAt": "2026-02-15T09:22:14.000Z"
  }
}

{
  "message": "A grace period can't be longer than 30 days",
  "data": null
}

{
  "message": "Invalid API key",
  "data": null
}

{
  "message": "Plan not found",
  "data": null
}