UCP Catalog Capability
LiveVerifiedNew optional UCP spec capability (March 2026) allowing AI agents to retrieve real-time product details from retailer catalogs, including variants, inventory, and pricing.
The UCP Catalog capability is a new optional specification addition announced by Google on March 19, 2026. It allows AI shopping agents to query a retailer's live product catalog for details such as variants, inventory levels, and real-time pricing. Agents can surface accurate product information without relying on potentially stale third-party data.
This capability is particularly useful when Feedonomics-style product feeds may have a data lag, or when real-time pricing and availability are critical to the shopping decision.
Why This Matters for UCP
The Catalog capability enables AI agents to access live merchant inventory and pricing data, ensuring accurate product representation in AI shopping surfaces.
UCP Endpoint
Live — Endpoint not yet publicly available
Integration Example
// UCP Catalog capability - real-time product details
const product = await ucpClient.catalog.getProduct({
merchant_id: 'merch_123',
product_id: 'prod_abc',
include: ['variants', 'inventory', 'pricing']
});
// Returns live data: { variants: [...], inventory: { in_stock: true, qty: 42 }, price: 89.99 }Category
Developer ToolsUCP Status
LiveTags
Pricing
free
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Reviews
★★★★★4.7 (3 reviews)These are illustrative examples to show what reviews will look like. Submit your own experience below.
Y. Okonkwo
API Engineer · Feb 25, 2026
Good tool for UCP conformance testing. Runs fast and the output is easy to parse in CI. Would like a JSON output mode — currently only text.
B. Thompson
Staff Engineer · Mar 5, 2026
This saved us days of work. Dropped it into our pipeline and had UCP endpoint validation running in about 20 minutes. Documentation is accurate.
K. Park
Backend Developer · Feb 18, 2026
The best developer tool in this category. TypeScript types are correct and complete. Error messages actually tell you what went wrong.
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