Postscript Integration
Send membership billing reminders via SMS and sync customer data with Postscript.
What is Postscript?
Postscript is an SMS marketing platform built specifically for Shopify stores. It helps you send targeted text messages to customers who have opted in.
With this integration, Subscribfy automatically:
Sends billing reminder events before membership charges
Updates subscriber properties with store credit balance
Provides magic links for easy membership management
How to Set Up
Step 1: Get Your Postscript API Key
Log in to your Postscript account
Go to Settings → API
Copy your Private API Key
Step 2: Connect in Subscribfy
Go to Subscribfy → Integrations
Find Postscript and click the toggle to enable
Enter your Postscript Private Key
Click Save
Events Sent to Postscript
Subscribfy sends the following event to Postscript:
Event Name | When It's Sent |
SubscribfyNextBillingDateAlert | Reminder before the next membership charge |
Note: Events are only sent to customers who have SMS marketing consent enabled in Shopify.
Event Properties
The billing reminder event includes these properties you can use in your Postscript automations:
Property | Description |
subscription_status | Current status (ACTIVE) |
next_billing_date | When the charge will occur (e.g., "Monday 15th of February 2026") |
store_credit | Customer's current store credit balance |
manage_page_link | Direct link for customer to manage their membership |
subscription_price | The price of the membership subscription |
Subscriber Properties
Subscribfy also updates these properties on the Postscript subscriber profile:
Property | Description |
SubscribfyStoreCredit | Customer's store credit balance (updated when credits change) |
SubscribfyMagicLink | Direct link to manage membership |
Use these properties to segment your audience or personalize messages.
Use Cases
Payment Reminder
The goal: Remind members before their card is charged
In Postscript, create a new Automation
Set trigger: SubscribfyNextBillingDateAlert event
Add SMS message using the event properties
Example: "Hi! Your ##{{subscription_price}} membership renews on ##{{next_billing_date}}. Manage here: ##{{manage_page_link}}"
Store Credit Segment
The goal: Target customers with store credits
In Postscript, create a new Segment
Filter by: SubscribfyStoreCredit greater than 0
Send campaign: "You have ##{{SubscribfyStoreCredit}} in store credits! Use them on your next order."
Troubleshooting
Events not appearing in Postscript?
Verify your API key is correct. Check that the integration is enabled (toggle is ON). Confirm your Postscript account has API access.
Customer not receiving SMS?
The customer must have SMS marketing consent enabled in Shopify. Check the customer's profile in Shopify Admin under "Customer consents".
Subscriber properties not updating?
Make sure the customer exists as a subscriber in Postscript with the same email address used in Shopify.
