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Overview

Subtotal Link is a browser-based experiences, offering maximum flexibility for brands and developers. 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

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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

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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
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.