AI agents have completed more than 138 million transactions through x402, a payment protocol designed to let software buy data, computing power and model access without a person approving every purchase.
Chainalysis reported that the transactions occurred on Base, the blockchain network incubated by Coinbase. The protocol works by allowing a service to quote a price, an agent to pay in a stablecoin and the service to verify the payment before fulfilling the request.
The most revealing number is not only transaction volume. More than 87% of analyzed x402 payments were worth ten cents or less. Traditional card systems are poorly suited to such small purchases because fixed fees and account setup can exceed the value of the service being bought. Stablecoin settlement may therefore offer a practical rail for machine-to-machine commerce.
Geographic data showed U.S.-linked wallets generated 88.1% of identifiable payments for AI model inference, while China-linked wallets represented 0.1% of that identified category. Chinese-linked wallets were much more prominent in payments for security and code-analysis services.
Those percentages require caution. They cover transactions for which Chainalysis could identify geographic links, not all 138 million payments, and blockchain activity does not reveal whether each transaction came from a distinct customer or a commercially useful task. High transaction counts can also reflect automated testing or repeated low-value calls.
The data nevertheless demonstrates that agents can hold budgets and pay for digital resources at a scale that conventional invoicing would not handle efficiently. For infrastructure providers, the opportunity lies in payment tools, wallet controls, fraud monitoring and auditable spending policies.
This evidence does not by itself establish a direct earnings catalyst for Coinbase or another listed company. Base and x402 may benefit from adoption, but investors still need fee revenue, active paying users and retention data before translating protocol usage into valuation. The next meaningful measure is economic value settled over time, not transaction count alone.