Agentic Commerce Stack

How an agent's purchase carries verifiable authorization from user to merchant

Agentic Commerce Stack How an agent's purchase carries verifiable authorization from user to merchant authorization + intent, verified User · states intent + budget · Architecture component User states intent + budget Agent · MCP tools + A2A · Architecture component · acts for user Agent MCP tools + A2A acts for user Payment Layer · verifiable mandate · authorization + intent, verified · AP2 / ACP / x402 Payment Layer verifiable mandate AP2 / ACP / x402 Merchant · goods / catalog · Architecture component Merchant goods / catalog Payment Provider · settle + capture · Architecture component Payment Provider settle + capture delegates signed mandate place order authorize + settle Legend Frontend Backend Security External

Capability

  • • MCP gives the agent tools and context
  • • A2A lets agents talk to other agents

Payment layer

  • • AP2 signs scoped mandates
  • • ACP powers ChatGPT Instant Checkout
  • • x402 pays over HTTP 402

Trust

  • • Verify the agent's identity
  • • Enforce the scoped mandate
  • • Keep tamper-evident audit