UCP Discovery and Commerce Capabilities

UCP means Universal Commerce Protocol. citelayer® distinguishes the free plugin’s discovery information from the commerce APIs implemented by each paid store add-on.

Check the active capability status

The free plugin reports available shop capabilities through its discovery surface. Installed, licensed, disabled and available are different states. An inactive or disabled add-on must not be assumed to provide a usable commerce flow.

WooCommerce: documented REST commerce

WooCommerce Pro exposes catalog browsing/search, stateless cart checks and calculation, signed draft carts, checkout handoff, signed checkout status/cancellation and signed order reads. Start with /wp-json/citelayer/v1/ucp/capabilities, /ucp/openapi.json, /ucp/auth and /ucp/coverage under the same REST namespace.

Its /.well-known/ucp business profile links the implemented REST contract. Buyer payment takes place at the WooCommerce payment URL.

EDD: a separate feature set

EDD Pro provides download listing/detail/categories/search, stateless cart validation/calculation and a pending-order handoff into the EDD payment flow. WooCommerce’s signed cart/lifecycle/order contract is not part of EDD 1.2.1.

Transport and payment boundaries

WooCommerce 1.2.19 advertises REST over HTTPS. Its context JSON is discovery, not an MCP JSON-RPC transport. It does not advertise A2A, Embedded Protocol, AP2 mandates or native autonomous payment execution. “Full UCP Support” is explicitly not claimed. See the REST API reference before building a client.

Next step

Continue with the quick start checklist, or check the common questions. For a reproducible problem, send the plugin versions, affected URL, expected result and actual response through Support. Do not include passwords, license keys or customer details.

Reviewed 6 October 2026 against citelayer® Free 1.13.5, WooCommerce add-on 1.2.19 and EDD add-on 1.2.1. Features depend on the active components and settings on your site.