Patrick R. Jordan

Protocol notes

The plumbing of agentic commerce

Notes on the open protocols agents use to talk to tools, to each other, and to businesses: UCP, MCP, and A2A.

Protocols

Universal Commerce Protocol (UCP)

Google's open standard enabling AI agents to transact with businesses.

Agentic Commerce

Model Context Protocol (MCP)

Open standard for connecting AI systems with external data sources.

AI Infrastructure

Agent-to-Agent Protocol (A2A)

Google's protocol enabling AI agents to communicate and collaborate with each other.

Agent Interop

Analysis

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UCP Embedded Protocol Transport

ECP enables in-context commerce — AI agents can complete transactions without browser redirects.

UCP

A2A Agent Identity Layer Proposals

WTRMRK and cross-org accountability — two proposals address agent trust across organizational boundaries.

A2A

Featured reading

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Universal Commerce Protocol Specification

The official spec for AI agents transacting with businesses autonomously.

Protocol

ReAct: Synergizing Reasoning and Acting

Foundational work on combining reasoning traces with actions in language models.

Paper

Repo pulse

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UCP: Embedded protocol transport binding for cart capability + reauth
Jing Li • Merged · Apr 3 · Analysis →
A2A: Agent Identity Layer — WTRMRK as trust primitive proposed
64R3N • Open · Apr 3 · Analysis →
OpenClaw: Failover scope fixes for OpenRouter-specific matchers
Altay • Merged · Apr 4
MCP: GuardVibe — Security MCP for vibe coding proposed
goklab • Open · Apr 4