addon_purchased Event - Upstack Data

Fires when a customer purchases an add-on feature or service. Use this event to measure add-on adoption and expansion revenue.

JavaScript

window._upstack('track', 'addon_purchased', {
  accountId: 'acct_abc123',
  subscriptionId: 'sub_def456',
  addonId: 'addon_advanced_analytics',
  addonName: 'Advanced Analytics',
  price: 4900,
  currency: 'USD',
  billingInterval: 'month'
});

Properties

Property	Type	Required	Description
accountId	string	Yes	Account identifier
addonId	string	Yes	Add-on identifier
subscriptionId	string	No	Subscription identifier
addonName	string	No	Human-readable add-on name
price	number	No	Add-on price in cents
currency	string	No	ISO 4217 currency code
billingInterval	string	No	`month` or `year`

When to Fire

When add-on is purchased from settings
When add-on checkout completes
When Stripe subscription item is added