Cancel Subscription - Flex Documentation

Cancel Subscription

cURL

curl --request DELETE \
  --url https://api.withflex.com/v1/subscriptions/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "subscription": {
    "cancel_at_period_end": false,
    "refund": "none",
    "refund_amount": 2500
  }
}
'  

Python

import requests

url = "https://api.withflex.com/v1/subscriptions/{id}"

payload = { "subscription": {
        "cancel_at_period_end": False,
        "refund": "none",
        "refund_amount": 2500
    } }
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)

JavaScript (Fetch)

const options = {
  method: 'DELETE',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    subscription: {cancel_at_period_end: false, refund: 'none', refund_amount: 2500}
  })
};

fetch('https://api.withflex.com/v1/subscriptions/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

PHP

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.withflex.com/v1/subscriptions/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "DELETE",
  CURLOPT_POSTFIELDS => json_encode([
    'subscription' => [
        'cancel_at_period_end' => false,
        'refund' => 'none',
        'refund_amount' => 2500
    ]
  ]),
  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;
}
?>

Go

package main

import (
    "fmt"
    "strings"
    "net/http"
    "io"
)

func main() {

url := "https://api.withflex.com/v1/subscriptions/{id}"

payload := strings.NewReader("{\n  \"subscription\": {\n    \"cancel_at_period_end\": false,\n    \"refund\": \"none\",\n    \"refund_amount\": 2500\n  }\n}")

req, _ := http.NewRequest("DELETE", 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))
}

Error Responses

Possible Status Codes

• 200: Successful operation.
• 401: Unauthorized access.
• 403: Forbidden action.
• 404: Resource not found.
• 409: Conflict in the request.
• 422: Unprocessable entity.
• 429: Too many requests.

JSON Response Example

Successful Response

{
  "subscription": {
    "subscription_id": "fsub_01J9XR8M3K7VZ8N2YB4WJ6T0RA",
    "created_at": "2026-06-15T14:30:00Z",
    "items": [{}],
    "status": "incomplete",
    "cancel_at_period_end": false,
    "current_period_end": "string",
    "current_period_start": "string",
    "metadata": {
      "order_id": "8842",
      "channel": "shopify"
    },
    "test_mode": false,
    "client_secret": {},
    "proration_behavior": "always_invoice",
    "trial_start": "string",
    "trial_end": "string",
    "cancel_at": "2026-06-15T14:30:00Z",
    "canceled_at": "2026-06-15T14:30:00Z"
  }
}

Error Response Example

{
  "code": "string",
  "detail": "string"
}

Authorization

Authorization Header

• Type: string
• Location: header
• Required: Use a Bearer token to access this API.

Path Parameters

• id: string (required) Example: "fsub_01J9XR8M3K7VZ8N2YB4WJ6T0RA"

Body

• Content-Type: application/json
• Required: The subscription payload carried by the request or response.

JSON Example

{
  "subscription": {
    "cancel_at_period_end": false,
    "refund": "none",
    "refund_amount": 2500
  }
}