In traditional blockchain systems, users must hold native tokens to pay Gas fees. While this ensures network functionality, it also raises the barrier to entry. As Web3 applications reach a broader audience, reducing transaction costs and complexity has become a critical challenge.
With AI Agents increasingly participating in on-chain activities, payment mechanisms must adapt to automated execution scenarios. The x402b protocol, introduced by Pieverse, was developed in response to this trend. By shifting Gas payment logic away from the user, it enables Agents to independently complete transaction processes, thereby enhancing the system’s overall availability and scalability.
Core Concepts of the x402b Protocol
Within Pieverse, x402b serves as a payment mechanism supporting Gasless transactions. It can be seen as an upgraded version of the AI Agent auto-payment protocol x402. Its core innovation is abstracting the transaction fee process, so users or callers do not need to handle Gas payments directly.
The protocol does not eliminate Gas fees but changes how they are paid. Fees remain within the system but are assumed or settled by third parties, the protocol layer, or service providers.
Why a Gasless Payment Mechanism Is Needed
Traditional on-chain interactions typically require users to have a wallet, hold native tokens, and understand Gas fees.
While this setup works for early Web3 adopters, the operational cost is high for newcomers or non-technical users. This is especially true in scenarios where AI Agents execute tasks, as frequent Gas payments can disrupt automated workflows.
Introducing a Gasless mechanism allows transactions to be completed without requiring real-time user approval, significantly improving interaction efficiency.
How x402b Enables Transaction Execution
Under the x402b model, a transaction generally follows these key steps:
First, the user or system sends instructions to the AI Agent.
The Agent then parses the instructions and determines the necessary on-chain operations.
During execution, the protocol layer covers the Gas fees, rather than the user paying directly.
Finally, the transaction results are recorded on-chain, complete with relevant timestamp information.
This process forms a closed transaction loop while preserving on-chain data verifiability.
How x402b Differs from Traditional On-Chain Payments
In traditional models, transaction execution and fee payment are tightly linked, requiring users to sign and pay at each step.
By contrast, x402b separates fee processing from execution logic, making the transaction experience more like that of Web2 applications. Users simply express their intent, and the system handles execution.
This distinction is especially pronounced in automated scenarios, as Agents can execute multiple transactions in succession without interrupting the workflow for fee confirmation.
The Value of x402b for AI Agents
AI Agents derive their core value from automated execution, which is hampered by frequent manual intervention.
With x402b, Agents can complete payments and transactions autonomously, enabling complex task flows such as batch or strategy execution.
This mechanism also allows Agents to participate in higher-frequency economic activity, boosting overall system efficiency.
Potential Limitations and Risks
Although the Gasless mechanism lowers barriers to entry, its operation depends on the stability of the fee-bearing party. If a third party covers the fees, sustainability and trust become critical considerations.
Automated execution also introduces risks, such as the repeated execution of erroneous instructions or inadequate access controls. As a result, systems typically incorporate constraints and audit mechanisms to ensure security.
Summary
The x402b protocol leverages fee abstraction and an agent-driven execution model to enable AI Agents to complete on-chain transactions without direct Gas payments from users. This approach lowers the entry threshold to Web3 and enhances automation, providing foundational support for agent-driven on-chain economies.
FAQs
Does x402b completely eliminate Gas fees?
No. Gas fees remain, but payment responsibility shifts from the user to the protocol or service layer.
Who pays the Gas costs in transactions?
Typically, the protocol, service provider, or a designated fee model covers the costs, depending on system design.
Is x402b compatible with all blockchains?
Compatibility depends on the specific system implementation. Adaptation methods may vary across different blockchain environments.
Are Gasless transactions more secure?
The Gasless mechanism primarily improves user experience; it does not inherently enhance security, which still relies on permissions and audit controls.
How does x402b support AI Agent automation?
By decoupling payment from execution, Agents can continuously complete transaction tasks without manual intervention.
