As AI Agents (Artificial Intelligence Agents) increasingly dominate on-chain economies, asset security faces unprecedented challenges. How can we empower AI agents to make payments without exposing the treasury to unlimited authorization risks?

The Q402 protocol developed by QuackAI provides an answer: Policy-Aware Execution. Under the Q402 framework, "signatures" are no longer one-time authorizations but a dynamic process governed by policy constraints. Developers can set extremely detailed "boundaries" for asset flows, such as transaction frequency limits, whitelisted specific contracts, or automatic blocking mechanisms based on multi-dimensional verification. This design, which embeds governance logic directly into the payment signature layer, makes Q402 an "intelligent inspector" for on-chain assets. In the automated future of Web3, security should not rely on post-hoc recourse but, like Q402, perform comprehensive policy compliance audits at the moment each signed payment occurs.

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