Give the reason for cancelling

curl --request POST \
  --url https://api.fluid.app/api/checkout/v2026-04/subscriptions/{subscription_token}/cancellation-sessions/{id}/reason \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "reason_code": "too_expensive"
}
'

import requests

url = "https://api.fluid.app/api/checkout/v2026-04/subscriptions/{subscription_token}/cancellation-sessions/{id}/reason"

payload = { "reason_code": "too_expensive" }
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({reason_code: 'too_expensive'})
};

fetch('https://api.fluid.app/api/checkout/v2026-04/subscriptions/{subscription_token}/cancellation-sessions/{id}/reason', 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.fluid.app/api/checkout/v2026-04/subscriptions/{subscription_token}/cancellation-sessions/{id}/reason",
  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([
    'reason_code' => 'too_expensive'
  ]),
  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://api.fluid.app/api/checkout/v2026-04/subscriptions/{subscription_token}/cancellation-sessions/{id}/reason"

	payload := strings.NewReader("{\n  \"reason_code\": \"too_expensive\"\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://api.fluid.app/api/checkout/v2026-04/subscriptions/{subscription_token}/cancellation-sessions/{id}/reason")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"reason_code\": \"too_expensive\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.fluid.app/api/checkout/v2026-04/subscriptions/{subscription_token}/cancellation-sessions/{id}/reason")

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  \"reason_code\": \"too_expensive\"\n}"

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

{
  "cancellation_session": {
    "id": "0199c6a4-5b2e-7d41-9f3a-2c8e1b7d4a60",
    "outcome": "open",
    "cancel_now_allowed": true,
    "expires_at": "2026-10-10T15:30:00Z",
    "retention_flow_version": 3,
    "reasons": [
      {
        "code": "too_expensive",
        "labels": {
          "en": "Too expensive"
        }
      },
      {
        "code": "taking_a_break",
        "labels": {}
      }
    ],
    "reason_code": "too_expensive",
    "reason_text": null,
    "offers": [
      {
        "offer_id": "rof_4kq9Zt2LmX8vB1nR7cWy",
        "type": "discount",
        "terms": {
          "percentage": 20,
          "duration": "once"
        },
        "saves": true,
        "preview": {
          "next_bill_date": "2026-11-03",
          "next_order_total": "27.0",
          "currency": "USD"
        }
      }
    ],
    "accepted_offer_id": null
  },
  "meta": {
    "request_id": "6d2f8a4c-3e1b-4c97-a5d0-9b4e2f7c1a38",
    "timestamp": "2026-10-10T15:00:00Z"
  }
}

{
  "message": "<string>"
}

{
  "error_message": "<string>",
  "errors": "<string>",
  "meta": {
    "request_id": "<string>",
    "timestamp": "2023-11-07T05:31:56Z",
    "code": "<string>",
    "payment_uuid": "<string>",
    "error_details": [
      {
        "code": "<string>",
        "field": "<string>",
        "payment": "not_attempted",
        "message": "<string>"
      }
    ],
    "coded_recovery": true
  }
}

{
  "error_message": "<string>",
  "errors": "<string>",
  "meta": {
    "request_id": "<string>",
    "timestamp": "2023-11-07T05:31:56Z",
    "code": "<string>",
    "payment_uuid": "<string>",
    "error_details": [
      {
        "code": "<string>",
        "field": "<string>",
        "payment": "not_attempted",
        "message": "<string>"
      }
    ],
    "coded_recovery": true
  }
}

{
  "error_message": "<string>",
  "errors": "<string>",
  "meta": {
    "request_id": "<string>",
    "timestamp": "2023-11-07T05:31:56Z",
    "code": "<string>",
    "payment_uuid": "<string>",
    "error_details": [
      {
        "code": "<string>",
        "field": "<string>",
        "payment": "not_attempted",
        "message": "<string>"
      }
    ],
    "coded_recovery": true
  }
}

{
  "error_message": "<string>",
  "errors": "<string>",
  "meta": {
    "request_id": "<string>",
    "timestamp": "2023-11-07T05:31:56Z",
    "code": "<string>",
    "payment_uuid": "<string>",
    "error_details": [
      {
        "code": "<string>",
        "field": "<string>",
        "payment": "not_attempted",
        "message": "<string>"
      }
    ],
    "coded_recovery": true
  }
}