Stablecoins are beginning to attract a new class of users: software capable of spending money without waiting for a human to press the 'Pay' button.
According to data from Token Terminal, over the past 30 days, AI agents initiated approximately 14 million transfers via the x402 protocol. The Base network led with 7.3 million transactions, while Polygon processed 5.6 million.
Almost all of these transactions used $USDC, which accounted for roughly 14 million transactions. This concentration indicates that as machine-to-machine commerce develops, autonomous agents are already leaning towards using a common settlement asset.
Stablecoins Find a New Payment Market
Agent commerce directly utilizes the strengths of stablecoins.
AI-based software can make frequent cross-border payments for amounts too small or irregular for traditional payment systems. An agent can independently purchase computing power, data, or API access whenever it needs that service.
X402 is designed for precisely this environment. This open standard, developed by Coinbase, uses the HTTP 402 "Payment Required" web mechanism, allowing software to automatically request and make payments. Coinbase has extended the reach of its orchestrator to the Base, Solana, and Polygon blockchains, with $USDC supported as the settlement asset.
This activity does not mean that 14 million separate AI agents are making purchases. One agent can initiate many transfers. Nevertheless, this frequency of operations offers a glimpse into the future of a payment market that did not exist at significant scale until recently.
For Circle, the issuer of $USDC, this could expand demand for stablecoins beyond human-driven trading, remittances, and corporate settlements.
Coinbase's "High-Conviction" Bet Begins to Take Shape
This growth follows Coinbase's July launch, which allowed businesses to accept payments in $USDC directly from AI agents via Coinbase Business.
Coinbase characterized agent payments as one of its "high-conviction bets." Companies can accept, reconcile, and withdraw funds from agents using the same account used for other Coinbase services.
This deployment connected the seller side of the market to Coinbase's broader agent infrastructure, including x402 and the Base network. The emerging picture is noteworthy. Base and Polygon are competing to process transactions, but $USDC is, for now, capturing the monetary layer.
Stablecoins were created to move dollars rapidly across blockchain networks. AI-based agents could provide this infrastructure with a much more extensive potential market, where customers transact continuously, globally, and without needing to open a checkout page.
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