Subscription Payments

Update subscription payment method

Updates the payment method for an existing subscription contract to use a different existing payment method. The new payment method must already be associated with the customer in Shopify.

Important Notes:

The payment method must already exist in the customer’s Shopify payment methods
Only valid, non-revoked payment methods can be used
The update is processed through Shopify’s subscription draft system
Payment method details are cached locally after successful update

Process Flow:

Validates subscription contract exists
Creates a draft update in Shopify
Updates the draft with new payment method
Commits the draft to apply changes
Caches payment instrument details locally
Records activity log entry

Authentication: Requires valid X-API-Key header

PUT

api

external

subscription-contracts-update-existing-payment-method

Update subscription payment method

curl --request PUT \
  --url https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method \
  --header 'X-API-Key: <x-api-key>'

import requests

url = "https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method"

headers = {"X-API-Key": "<x-api-key>"}

response = requests.put(url, headers=headers)

print(response.text)

const options = {method: 'PUT', headers: {'X-API-Key': '<x-api-key>'}};

fetch('https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

const url = 'https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method';
const options = {method: 'PUT', headers: {'X-API-Key': '<x-api-key>'}};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_HTTPHEADER => [
    "X-API-Key: <x-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"
	"net/http"
	"io"
)

func main() {

	url := "https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method"

	req, _ := http.NewRequest("PUT", url, nil)

	req.Header.Add("X-API-Key", "<x-api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method")

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

request = Net::HTTP::Put.new(url)
request["X-API-Key"] = '<x-api-key>'

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

{
  "message": "Payment method updated successfully"
}

Headers

X-API-Key

string

required

API Key for authentication

Query Parameters

contractId

integer<int64>

required

Subscription contract ID to update payment method for. Must be a valid contract ID that belongs to the authenticated shop.

Required range: x >= 1

paymentMethodId

string

required

ID of the existing customer payment method to use. Must be a valid Shopify GraphQL payment method ID in the format 'gid://shopify/CustomerPaymentMethod/{id}'. The payment method must:

Already exist in the customer's Shopify account
Be in a valid state (not expired or revoked)
Be authorized for subscription use

You can retrieve available payment methods using the customer payment methods endpoint.

Pattern: ^gid://shopify/CustomerPaymentMethod/[a-zA-Z0-9]+$

Response

Payment method updated successfully

Update subscription payment method

curl --request PUT \
  --url https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method \
  --header 'X-API-Key: <x-api-key>'

import requests

url = "https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method"

headers = {"X-API-Key": "<x-api-key>"}

response = requests.put(url, headers=headers)

print(response.text)

const options = {method: 'PUT', headers: {'X-API-Key': '<x-api-key>'}};

fetch('https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

const url = 'https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method';
const options = {method: 'PUT', headers: {'X-API-Key': '<x-api-key>'}};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PUT",
  CURLOPT_HTTPHEADER => [
    "X-API-Key: <x-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"
	"net/http"
	"io"
)

func main() {

	url := "https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method"

	req, _ := http.NewRequest("PUT", url, nil)

	req.Header.Add("X-API-Key", "<x-api-key>")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://subscription-admin.appstle.com/api/external/v2/subscription-contracts-update-existing-payment-method")

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

request = Net::HTTP::Put.new(url)
request["X-API-Key"] = '<x-api-key>'

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

{
  "message": "Payment method updated successfully"
}

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Update subscription payment method

Headers

Query Parameters

Response