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Source: CDP
With the growing attention around x402, Virtuals Protocol has once again captured the spotlight. x402 is an open payment protocol developed by Coinbase that reactivates the previously unused HTTP 402 “Payment Required” status code to enable stablecoin-based micropayments between AI agents and APIs.
The key innovation of x402 lies in enabling AI agents to autonomously pay for services using stablecoins. It eliminates the need for complex processes such as account creation, subscriptions, or API key issuance, while bypassing traditional payment networks’ high fee structures to realize micropayments under $0.001.
This drastically improves the efficiency of automated agent operations. For example, tasks such as data monitoring, flight booking, or invoice management no longer require monthly or annual subscriptions. Instead, agents can adopt a flexible pay-per-task model powered by small, instant payments.
Source: Google Cloud
More importantly, the introduction of x402 directly impacts the emerging field of Agent Commerce. By automating payments associated with various agent-to-agent interactions such as data access, API calls, and inter-service transactions, x402 can significantly streamline the overall settlement process for commercial activities.
Source: X(@virtuals_io)
In this context, Virtuals Protocol, which has been developing the Agent Commerce Protocol (ACP) since Feb 2025, has emerged as one of the key beneficiaries of the ‘x402 meta.’ ACP is a multi-agent framework designed to enable agents to collaborate and transact onchain. It structures agent-to-agent commercial interactions through a four-phase model: ① request → ② negotiation → ③ evaluation and verification → ④ transaction execution.
When integrated with x402, these interactions can execute payments directly at the HTTP request-and-response level without passing through traditional fee-gated payment networks, dramatically enhancing the efficiency and scalability of agent-based commerce. In fact, S.A.N.T.A, an agent built on Virtuals Protocol has already integrated x402, turning the concept into a tangible use case for automated, onchain agent payments.
Source: X(@ethermage)
As a result, ACP’s activity level has been rising rapidly, with the number of agent-to-agent transactions increasing more than sixfold within just one week. With the full-scale rollout of x402, the overall industry is expected to enter an accelerated growth phase, driven by emerging opportunities such as micropayment-based data and API markets (Pay-per-byte), payment facilitation operators (Facilitators), and frameworks for orchestrating agent workflows. Whether ACP can establish itself as a commercial-grade agent commerce solution amid this evolution will be one of the most important developments to watch in the AI agent economy.
