CE Phoenix Cart Forum

To add Google’s Universal Cart (powered by the Universal Commerce Protocol) to your website, you do not install a simple snippet of code. Instead, you must enable agentic commerce and checkout integration through Google Merchant Center.

Here is the step-by-step process to get your store ready:

1. Check Technical Requirements & Platforms

Because the Universal Cart lets AI assistants interact directly with your store, your e-commerce backend must support the Universal Commerce Protocol (UCP). If you use major platforms like Shopify, check your e-commerce settings to enable UCP and activate Google Pay/Wallet for seamless checkout. Custom websites will require technical implementation of Google's UCP APIs.

2. Configure Google Merchant Center

To participate, you must actively configure your account for Universal Commerce Protocol (UCP).

* Ensure your website is connected and verified in Google Merchant Center.
* Go to your Merchant Center Settings and select UCP Integration.
* Map your product attributes to the UCP standard schema.
* Publish your Merchant UCP Profile (typically hosted at your site's .well-known/ucp directory) to allow Google to verify your payment handlers and public keys.

3. Enable Native Commerce Eligibility

For individual products to be purchasable via the Universal Cart in AI searches, you must declare them eligible.

* Add the native_commerce attribute (with a value of 1) to your product listings in your feed (via a Google Sheet or supplemental feed API).

4. Test and Submit

* Google requires you to test your UCP implementation in their sandbox environment.
* Once everything passes, you can validate your production endpoints in Merchant Center and await final approval from Google to go live.