Skip to main content

​
Overview

Subtotal Link is a browser-based experience that allows customers to connect their retailer accounts to your brand. Each retailer has a dedicated Link URL that can be used to launch Subtotal Link when a customer is ready to link an account. subtotal link

​
Query parameters

You can optionally include the following query parameters in a Link URL to provide additional context when a user links their account.
ParameterDescriptionExample
customer_idA unique identifier used to map connections to customer records across external systems.8a46e581-48ba-498a-9ad0-2ee72582e1af
redirect_urlThe URL that customers should be redirected to after successfully linking their account.https://example.com/profile
Here’s an example of a complete Link URL with both query parameters included: 
https://link.subtotal.com/tWGE4TJM
  ?customer_id=8a46e581-48ba-498a-9ad0-2ee72582e1af
  &redirect_url=https%3A%2F%2Fexample.com%2Fprofile

​
Use cases

Link URLs allow your customers to connect their retailer accounts directly from any digital experience. You can use them wherever your brand engages customers — across web, mobile, or physical channels. Common examples include:
  • Loyalty programs and rewards experiences
  • Landing pages for customer promos
  • User profile pages within your app
  • QR codes on packaging and in-store displays
  • Social posts or digital ads
Because Subtotal Link runs entirely in the browser, it offers maximum flexibility for brands and developers. You can launch the linking experience from any digital surface — a website, mobile app, email, QR code, or social post — without requiring any native SDK or embedded component.