Postscript Integration

Send membership billing reminders via SMS and sync customer data with Postscript.

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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

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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

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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.

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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

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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.

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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."

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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.

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