The evolution of AI Agents has driven innovation in payment systems. The three major protocols, x402, AP2, and ERC-8004, respectively solidify the foundation in payment, authorization, and identity verification, enabling intelligent agents to autonomously transact, authorize compliantly, and establish trust, ushering in a new era of the machine economy.
x402: Payment becomes the core of the network protocol.
The x402 protocol launched by Coinbase integrates native payments into the HTTP communication process. When a client requests a service, the server responds with a payment request, and the client automatically completes the payment using stablecoins, without the need for human intervention or third-party verification. This significantly reduces payment friction and supports instant transactions, currently spanning multiple chains including Base, Avalanche, and Solana.
AP2: Authorization Transparency and Responsibility Division
The Agent Payments Protocol (AP2) regulates the authorization process of AI Agents, clearly defining actions and responsibilities through digital authorizations. It includes three main types: intent, shopping cart, and payment authorization, ensuring that transactions are legal, compliant, and traceable, providing necessary behavioral evidence for financial institutions and regulators.
ERC-8004: On-chain Identity and Trust Protocol
The ERC-8004 protocol is an evolution of ERC-721, establishing a unique and verifiable identity for AI Agents. With a reputation and verification registry, it integrates on-chain and off-chain data to ensure the reliability of the agents’ credit and behavior, forming a trustworthy autonomous system that eliminates concerns about black boxes.
The three major protocols work together to promote a new type of economy.
These three major protocols work together to provide comprehensive support for AI Agents: x402 is responsible for trade execution, AP2 manages authorization rules, and ERC-8004 provides identity verification. This allows smart agents not only to execute tasks but also to autonomously manage assets and payments, enabling automatic payments and economic cooperation between machines.
Summary
As the autonomy of AI Agents continues to enhance, payment systems are being redefined, from native chain payments on x402, to authorization standards of AP2, and the decentralized identity framework of ERC-8004, these three major protocols are laying the foundation of trust for the AI Agent economy.
* The information is not intended to be and does not constitute financial advice or any other recommendation of any sort offered or endorsed by Gate.
