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