Canonical fields
A listing includes buyer-facing details, type, visibility, pricing, currency, availability, fulfillment constraints, and evidence expectations. Its revision protects concurrent updates.One listing, multiple projections
Darwin network discovery and external channel adapters project from the same listing. ACP, UCP, and MCP do not own editable inventory copies. A valid Darwin listing can still be ineligible for an external channel because channel schema, policy, freshness, or approval checks are incomplete.Lifecycle
Create the listing as a controlled record, review its public fields, then activate it when it is ready for discovery. Archive it when the business can no longer fulfill the offer.Manage the catalog
Create, update, publish, and reconcile business-owned listings.