Tag: Capability Negotiation
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UCP’s Layered Architecture Explained: How REST, MCP, A2A, and AP2 Work Together
UCP’s layered architecture separates core transaction primitives from capabilities, extensions, and payment handlers — enabling the protocol to scale across millions of merchants and evolve without breaking existing integrations. This guide explains each layer, how merchant profiles and capability negotiation work, what the checkout state machine does, and how REST, MCP, A2A, and AP2 connect…
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Configure /.well-known/ucp Discovery Endpoint for AI
The /.well-known/ucp discovery endpoint is a standardized configuration protocol that enables AI agents and commerce platforms to automatically detect Universal Commerce Protocol (UCP) capabilities on your e-commerce store. Implementing this endpoint allows agentic systems to query your server’s metadata, identify supported transaction types, and establish authenticated connections for autonomous purchasing workflows. Configure this endpoint by…