Behind the x402 Craze: How ERC-8004 is Building the Cornerstone of AI Agents' Trust

By: blockbeats|2025/11/07 16:30:03
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Original Article Title: "Bitget Wallet Research Institute: Behind the x402 Craze, How Does ERC-8004 Build the Cornerstone of an AI Agent"

1. Introduction: From the x402 Craze to the Emergence of ERC-8004

Recently, as the x402 protocol designed for automatic micro-payments between AI agents has become a market hot topic, discussions about its early potential have been ongoing. However, under the halo of x402, a more fundamental standard—ERC-8004—is quietly entering the field of keen observers.

A new question arises: since x402 has already focused on solving the payment issue, what is the role of ERC-8004? Are they in a competitive relationship?

The answer seems to be negative. They are more like elegantly designed, complementary components in the business landscape of AI agents.

Behind the x402 Craze: How ERC-8004 is Building the Cornerstone of AI Agents' Trust

Source: X Post by Davide Crapis, AI Lead at the Ethereum Foundation

An aspect worth noting is that the creator of x402, Erik Reppel from Coinbase, is also one of the final signatories of the ERC-8004 protocol. Along with him, core representatives from MetaMask, Google, and the Ethereum Foundation have also signed this standard. This heavyweight lineup with significant personnel overlap strongly suggests that they are not in a competitive relationship, but are jointly building a grander blueprint.

The logic of this blueprint is very clear: if the emergence of x402 confirms the significant demand for AI agent payments, then ERC-8004 represents another more foundational core element necessary to build this vast machine economy. It targets precisely the core challenge that x402 alone cannot solve—where does trust come from in an economy where AI agents autonomously collaborate? The Bitget Wallet Research Institute may help you find the answer in this article.

2. The "Trust" Issue of Agent Collaboration: The Dilemma x402 Alone Cannot Solve

In the commercial collaboration of AI agents, payment (the issue addressed by x402) is only the final step of the closed loop. A more fundamental issue lies ahead: how can an AI agent be sure that the other AI agent it has hired is trustworthy? In other words, how can an agent prove its ability to accomplish the task at hand?

To answer this question, we must delve into the foundational framework of agent commerce. According to the theory supported by Davide Crapis of the Ethereum Foundation, a decentralized AI agent business system must rely on three main pillars to operate securely: Discovery, Communication, and Computation.

                            Source: X Tweet forwarded by Davide Crapis

As shown in the table above, the x402 protocol itself mainly addresses the payment standard issue in the communication layer, but it does not answer the critical questions of identity verification and reputation assessment. Before making a payment, an AI agent first needs to be securely "discovered," thereby establishing trust and cooperation. ERC-8004 precisely tackles this problem by building a decentralized trust layer.

The ERC-8004, led by the Ethereum Foundation's dAI team and Consensys, in collaboration with institutions such as MetaMask, Google, and Coinbase, aims to be the on-chain "trust layer" for AI agents. It is a decentralized business registration and registry system that provides each AI agent with a verifiable identity, a complete history of performance, and proof of capability. All information is immutably recorded on the blockchain and openly accessible to all participants.

Source: ERC-8004 Official Website

III. ERC-8004: Decentralized Trust Layer for Agents

ERC-8004 is positioned as the foundational infrastructure of agent economics, with its core value lying in using blockchain technology to address the fundamental issue of AI agents lacking a trusted identity, enabling them to break free from the constraints of traditional centralized platforms and establish verifiable, cross-platform collaborative relationships.

This mechanism operates based on ecosystem contributors' input of trust data: AI developers are responsible for registering the unique identity of the agent; application developers continuously provide behavioral feedback of the agent to accumulate reputation data; and validation services act as independent auditors, providing trustworthy on-chain validation of the agent's operations.

Source: Compiled by Bitget Wallet

This information converges into the ERC-8004 Registry, which consolidates the three core functions of the protocol:

· Identity Registry: Through the ERC-721 NFT protocol, it grants each AI agent a unique digital identity. This design not only makes identities transferable but also allows them to be linked to standardized "agent cards" to detailed record the agent's name, capabilities, and metadata, ultimately achieving cross-platform permissionless discovery.

· Reputation Registry: This mechanism, built upon the identity registration, serves as a decentralized review system. Clients or other agents can submit structured feedback. The key design is that these evaluations can be linked to x402 payment proofs, ensuring that only genuine transaction participants can conduct assessments, thereby effectively reducing fraudulent behavior and ensuring the public transparency of all reputation data.

· Validation Registry: It provides the final safeguard for high-risk or high-value transactions. Agents can request trusted third-party validation, such as TEE oracles, staked inference, or ZK-ML proofs. These validation methods can provide cryptographic proof for specific model execution and outputs, thereby establishing a verifiable accountability mechanism similar to traditional market professional certifications.

Relying on the trusted data foundation provided by ERC-8004, a new downstream application ecosystem has flourished, including browsers for agent discovery and queries, marketplaces that allow agents to trade freely based on reputation, professional rating agencies, and even innovative services such as InfoFi and AgentFi. These advanced applications are all built on the trusted identity of agents and their validation records, marking the formal establishment of a permissionless, efficient collaboration intelligent agent service ecosystem.

Four, Collaboration: The Complete Process of an Intelligent Agent Transaction

So, how do these components collaborate in practice? The full lifecycle of a decentralized AI intelligent agent transaction can clearly illustrate this process.

Source: Compiled by Bitget Wallet

1. First, the Requesting Party Agent initiates service discovery and evaluation through the ERC-8004 Identity and Reputation Registry, querying and filtering out service provider agents with specific capabilities and good credit.

2. Once both parties reach an agreement, the Requesting Party then uses the x402 Payment Protocol to lock the required fee in a smart contract (i.e., financial guarantee).

3. Subsequently, the Service Provider Agent begins executing the task and undergoes third-party validation. Their work output runs on a verifiable computation layer like EigenCompute, generating cryptographic proof. An independent third-party validation agent then records the audit result in the ERC-8004 Verification Registry.

4. Finally, in the automatic settlement phase, the x402 smart contract automatically detects the trusted signature in the ERC-8004 Verification Registry. Once the task eligibility is confirmed, the funds are automatically released to the Service Provider Agent.

In this closed-loop process, ERC-8004 is responsible for admission and acceptance, x402 is responsible for payment, and verifiable computation secures the process. Each of the three is indispensable. This also indicates that, unlike early rewards concentrated in the payment token of x402, the ecosystem of ERC-8004 (as shown in the figure below) will be distributed across multiple layers such as infrastructure, middleware, and applications.

Source: BlockFlow

Five, Conclusion: The Order and Future of the Machine Economy

One point to acknowledge is that ERC-8004 is currently in the early stage of promotion and implementation—the cold start of related products and whether the grand vision of "machine economy identity validation" can be achieved are still subject to market observation. In addition, the costs and specific implementation paths of third-party validation, as well as its interoperability with protocols like x402, are significant variables that need to be addressed in the future.

But what can be certain is that the emergence of protocols like ERC-8004 signals that the machine economy is moving from “wild growth” to “establishing order.” It provides a cross-platform identity and credit system for autonomous AI agents for the first time.

If x402 is the “currency” of the machine economy, then what ERC-8004 offers is the “passport” and “credit report,” marking the beginning of a permissionless, efficient, collaborative, and trustworthy intelligent agent service ecosystem.

This article is a guest contribution and does not represent the views of BlockBeats.

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China's Central Bank and Eight Other Departments' Latest Regulatory Focus: Key Attention to RWA Tokenized Asset Risk


Foreword: Today, the People's Bank of China's website published the "Notice of the People's Bank of China, National Development and Reform Commission, Ministry of Industry and Information Technology, Ministry of Public Security, State Administration for Market Regulation, China Banking and Insurance Regulatory Commission, China Securities Regulatory Commission, State Administration of Foreign Exchange on Further Preventing and Dealing with Risks Related to Virtual Currency and Others (Yinfa [2026] No. 42)", the latest regulatory requirements from the eight departments including the central bank, which are basically consistent with the regulatory requirements of recent years. The main focus of the regulation is on speculative activities such as virtual currency trading, exchanges, ICOs, overseas platform services, and this time, regulatory oversight of RWA has been added, explicitly prohibiting RWA tokenization, stablecoins (especially those pegged to the RMB). The following is the full text:


To the people's governments of all provinces, autonomous regions, and municipalities directly under the Central Government, the Xinjiang Production and Construction Corps:


  Recently, there have been speculative activities related to virtual currency and Real-World Assets (RWA) tokenization, disrupting the economic and financial order and jeopardizing the property security of the people. In order to further prevent and address the risks related to virtual currency and Real-World Assets tokenization, effectively safeguard national security and social stability, in accordance with the "Law of the People's Republic of China on the People's Bank of China," "Law of the People's Republic of China on Commercial Banks," "Securities Law of the People's Republic of China," "Law of the People's Republic of China on Securities Investment Funds," "Law of the People's Republic of China on Futures and Derivatives," "Cybersecurity Law of the People's Republic of China," "Regulations of the People's Republic of China on the Administration of Renminbi," "Regulations on Prevention and Disposal of Illegal Fundraising," "Regulations of the People's Republic of China on Foreign Exchange Administration," "Telecommunications Regulations of the People's Republic of China," and other provisions, after reaching consensus with the Cyberspace Administration of China, the Supreme People's Court, and the Supreme People's Procuratorate, and with the approval of the State Council, the relevant matters are notified as follows:


  I. Clarify the essential attributes of virtual currency, Real-World Assets tokenization, and related business activities


  (I) Virtual currency does not possess the legal status equivalent to fiat currency. Virtual currencies such as Bitcoin, Ether, Tether, etc., have the main characteristics of being issued by non-monetary authorities, using encryption technology and distributed ledger or similar technology, existing in digital form, etc. They do not have legal tender status, should not and cannot be circulated and used as currency in the market.


  The business activities related to virtual currency are classified as illegal financial activities. The exchange of fiat currency and virtual currency within the territory, exchange of virtual currencies, acting as a central counterparty in buying and selling virtual currencies, providing information intermediary and pricing services for virtual currency transactions, token issuance financing, and trading of virtual currency-related financial products, etc., fall under illegal financial activities, such as suspected illegal issuance of token vouchers, unauthorized public issuance of securities, illegal operation of securities and futures business, illegal fundraising, etc., are strictly prohibited across the board and resolutely banned in accordance with the law. Overseas entities and individuals are not allowed to provide virtual currency-related services to domestic entities in any form.


  A stablecoin pegged to a fiat currency indirectly fulfills some functions of the fiat currency in circulation. Without the consent of relevant authorities in accordance with the law and regulations, any domestic or foreign entity or individual is not allowed to issue a RMB-pegged stablecoin overseas.


(II)Tokenization of Real-World Assets refers to the use of encryption technology and distributed ledger or similar technologies to transform ownership rights, income rights, etc., of assets into tokens (tokens) or other interests or bond certificates with token (token) characteristics, and carry out issuance and trading activities.


  Engaging in the tokenization of real-world assets domestically, as well as providing related intermediary, information technology services, etc., which are suspected of illegal issuance of token vouchers, unauthorized public offering of securities, illegal operation of securities and futures business, illegal fundraising, and other illegal financial activities, shall be prohibited; except for relevant business activities carried out with the approval of the competent authorities in accordance with the law and regulations and relying on specific financial infrastructures. Overseas entities and individuals are not allowed to illegally provide services related to the tokenization of real-world assets to domestic entities in any form.


  II. Sound Work Mechanism


  (III) Inter-agency Coordination. The People's Bank of China, together with the National Development and Reform Commission, the Ministry of Industry and Information Technology, the Ministry of Public Security, the State Administration for Market Regulation, the China Banking and Insurance Regulatory Commission, the China Securities Regulatory Commission, the State Administration of Foreign Exchange, and other departments, will improve the work mechanism, strengthen coordination with the Cyberspace Administration of China, the Supreme People's Court, and the Supreme People's Procuratorate, coordinate efforts, and overall guide regions to carry out risk prevention and disposal of virtual currency-related illegal financial activities.


  The China Securities Regulatory Commission, together with the National Development and Reform Commission, the Ministry of Industry and Information Technology, the Ministry of Public Security, the People's Bank of China, the State Administration for Market Regulation, the China Banking and Insurance Regulatory Commission, the State Administration of Foreign Exchange, and other departments, will improve the work mechanism, strengthen coordination with the Cyberspace Administration of China, the Supreme People's Court, and the Supreme People's Procuratorate, coordinate efforts, and overall guide regions to carry out risk prevention and disposal of illegal financial activities related to the tokenization of real-world assets.


  (IV) Strengthening Local Implementation. The people's governments at the provincial level are overall responsible for the prevention and disposal of risks related to virtual currencies and the tokenization of real-world assets in their respective administrative regions. The specific leading department is the local financial regulatory department, with participation from branches and dispatched institutions of the State Council's financial regulatory department, telecommunications regulators, public security, market supervision, and other departments, in coordination with cyberspace departments, courts, and procuratorates, to improve the normalization of the work mechanism, effectively connect with the relevant work mechanisms of central departments, form a cooperative and coordinated working pattern between central and local governments, effectively prevent and properly handle risks related to virtual currencies and the tokenization of real-world assets, and maintain economic and financial order and social stability.


  III. Strengthened Risk Monitoring, Prevention, and Disposal


  (5) Enhanced Risk Monitoring. The People's Bank of China, China Securities Regulatory Commission, National Development and Reform Commission, Ministry of Industry and Information Technology, Ministry of Public Security, State Administration of Foreign Exchange, Cyberspace Administration of China, and other departments continue to improve monitoring techniques and system support, enhance cross-departmental data analysis and sharing, establish sound information sharing and cross-validation mechanisms, promptly grasp the risk situation of activities related to virtual currency and real-world asset tokenization. Local governments at all levels give full play to the role of local monitoring and early warning mechanisms. Local financial regulatory authorities, together with branches and agencies of the State Council's financial regulatory authorities, as well as departments of cyberspace and public security, ensure effective connection between online monitoring, offline investigation, and fund tracking, efficiently and accurately identify activities related to virtual currency and real-world asset tokenization, promptly share risk information, improve early warning information dissemination, verification, and rapid response mechanisms.


  (6) Strengthened Oversight of Financial Institutions, Intermediaries, and Technology Service Providers. Financial institutions (including non-bank payment institutions) are prohibited from providing account opening, fund transfer, and clearing services for virtual currency-related business activities, issuing and selling financial products related to virtual currency, including virtual currency and related financial products in the scope of collateral, conducting insurance business related to virtual currency, or including virtual currency in the scope of insurance liability. Financial institutions (including non-bank payment institutions) are prohibited from providing custody, clearing, and settlement services for unauthorized real-world asset tokenization-related business and related financial products. Relevant intermediary institutions and information technology service providers are prohibited from providing intermediary, technical, or other services for unauthorized real-world asset tokenization-related businesses and related financial products.


  (7) Enhanced Management of Internet Information Content and Access. Internet enterprises are prohibited from providing online business venues, commercial displays, marketing, advertising, or paid traffic diversion services for virtual currency and real-world asset tokenization-related business activities. Upon discovering clues of illegal activities, they should promptly report to relevant departments and provide technical support and assistance for related investigations and inquiries. Based on the clues transferred by the financial regulatory authorities, the cyberspace administration, telecommunications authorities, and public security departments should promptly close and deal with websites, mobile applications (including mini-programs), and public accounts engaged in virtual currency and real-world asset tokenization-related business activities in accordance with the law.


  (8) Strengthened Entity Registration and Advertisement Management. Market supervision departments strengthen entity registration and management, and enterprise and individual business registrations must not contain terms such as "virtual currency," "virtual asset," "cryptocurrency," "crypto asset," "stablecoin," "real-world asset tokenization," or "RWA" in their names or business scopes. Market supervision departments, together with financial regulatory authorities, legally enhance the supervision of advertisements related to virtual currency and real-world asset tokenization, promptly investigating and handling relevant illegal advertisements.


  (IX) Continued Rectification of Virtual Currency Mining Activities. The National Development and Reform Commission, together with relevant departments, strictly controls virtual currency mining activities, continuously promotes the rectification of virtual currency mining activities. The people's governments of various provinces take overall responsibility for the rectification of "mining" within their respective administrative regions. In accordance with the requirements of the National Development and Reform Commission and other departments in the "Notice on the Rectification of Virtual Currency Mining Activities" (NDRC Energy-saving Building [2021] No. 1283) and the provisions of the "Guidance Catalog for Industrial Structure Adjustment (2024 Edition)," a comprehensive review, investigation, and closure of existing virtual currency mining projects are conducted, new mining projects are strictly prohibited, and mining machine production enterprises are strictly prohibited from providing mining machine sales and other services within the country.


  (X) Severe Crackdown on Related Illegal Financial Activities. Upon discovering clues to illegal financial activities related to virtual currency and the tokenization of real-world assets, local financial regulatory authorities, branches of the State Council's financial regulatory authorities, and other relevant departments promptly investigate, determine, and properly handle the issues in accordance with the law, and seriously hold the relevant entities and individuals legally responsible. Those suspected of crimes are transferred to the judicial authorities for processing according to the law.


 (XI) Severe Crackdown on Related Illegal and Criminal Activities. The Ministry of Public Security, the People's Bank of China, the State Administration for Market Regulation, the China Banking and Insurance Regulatory Commission, the China Securities Regulatory Commission, as well as judicial and procuratorial organs, in accordance with their respective responsibilities, rigorously crack down on illegal and criminal activities related to virtual currency, the tokenization of real-world assets, such as fraud, money laundering, illegal business operations, pyramid schemes, illegal fundraising, and other illegal and criminal activities carried out under the guise of virtual currency, the tokenization of real-world assets, etc.


  (XII) Strengthen Industry Self-discipline. Relevant industry associations should enhance membership management and policy advocacy, based on their own responsibilities, advocate and urge member units to resist illegal financial activities related to virtual currency and the tokenization of real-world assets. Member units that violate regulatory policies and industry self-discipline rules are to be disciplined in accordance with relevant self-regulatory management regulations. By leveraging various industry infrastructure, conduct risk monitoring related to virtual currency, the tokenization of real-world assets, and promptly transfer issue clues to relevant departments.


  IV. Strict Supervision of Domestic Entities Engaging in Overseas Business Activities


(XIII) Without the approval of relevant departments in accordance with the law and regulations, domestic entities and foreign entities controlled by them may not issue virtual currency overseas.


  (XIV) Domestic entities engaging directly or indirectly in overseas external debt-based tokenization of real-world assets, or conducting asset securitization activities abroad based on domestic ownership rights, income rights, etc. (hereinafter referred to as domestic equity), should be strictly regulated in accordance with the principles of "same business, same risk, same rules." The National Development and Reform Commission, the China Securities Regulatory Commission, the State Administration of Foreign Exchange, and other relevant departments regulate it according to their respective responsibilities. For other forms of overseas real-world asset tokenization activities based on domestic equity by domestic entities, the China Securities Regulatory Commission, together with relevant departments, supervise according to their division of responsibilities. Without the consent and filing of relevant departments, no unit or individual may engage in the above-mentioned business.


  (15) Overseas subsidiaries and branches of domestic financial institutions providing Real World Asset Tokenization-related services overseas shall do so legally and prudently. They shall have professional personnel and systems in place to effectively mitigate business risks, strictly implement customer onboarding, suitability management, anti-money laundering requirements, and incorporate them into the domestic financial institutions' compliance and risk management system. Intermediaries and information technology service providers offering Real World Asset Tokenization services abroad based on domestic equity or conducting Real World Asset Tokenization business in the form of overseas debt for domestic entities directly or indirectly venturing abroad must strictly comply with relevant laws and regulations. They should establish and improve relevant compliance and internal control systems in accordance with relevant normative requirements, strengthen business and risk control, and report the business developments to the relevant regulatory authorities for approval or filing.


  V. Strengthen Organizational Implementation


  (16) Strengthen organizational leadership and overall coordination. All departments and regions should attach great importance to the prevention of risks related to virtual currencies and Real World Asset Tokenization, strengthen organizational leadership, clarify work responsibilities, form a long-term effective working mechanism with centralized coordination, local implementation, and shared responsibilities, maintain high pressure, dynamically monitor risks, effectively prevent and mitigate risks in an orderly and efficient manner, legally protect the property security of the people, and make every effort to maintain economic and financial order and social stability.


  (17) Widely carry out publicity and education. All departments, regions, and industry associations should make full use of various media and other communication channels to disseminate information through legal and policy interpretation, analysis of typical cases, and education on investment risks, etc. They should promote the illegality and harm of virtual currencies and Real World Asset Tokenization-related businesses and their manifestations, fully alert to potential risks and hidden dangers, and enhance public awareness and identification capabilities for risk prevention.


  VI. Legal Responsibility


  (18) Engaging in illegal financial activities related to virtual currencies and Real World Asset Tokenization in violation of this notice, as well as providing services for virtual currencies and Real World Asset Tokenization-related businesses, shall be punished in accordance with relevant regulations. If it constitutes a crime, criminal liability shall be pursued according to the law. For domestic entities and individuals who knowingly or should have known that overseas entities illegally provided virtual currency or Real World Asset Tokenization-related services to domestic entities and still assisted them, relevant responsibilities shall be pursued according to the law. If it constitutes a crime, criminal liability shall be pursued according to the law.


  (19) If any unit or individual invests in virtual currencies, Real World Asset Tokens, and related financial products against public order and good customs, the relevant civil legal actions shall be invalid, and any resulting losses shall be borne by them. If there are suspicions of disrupting financial order and jeopardizing financial security, the relevant departments shall deal with them according to the law.


  This notice shall enter into force upon the date of its issuance. The People's Bank of China and ten other departments' "Notice on Further Preventing and Dealing with the Risks of Virtual Currency Trading Speculation" (Yinfa [2021] No. 237) is hereby repealed.


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