AI Agents Start Making Payments, Opening a New Market for Stablecoins
Summary
- The spread of AI-agent payments is pushing stablecoins, especially USDC, into a leading payment role.
- Coinbase's AI-agent payment protocol x402 has processed 165 million transactions and more than $50 million in payments, with about 99% settled in USDC.
- Stablecoins could become a primary payment tool if small, high-frequency machine-to-machine payments by AI agents continue to expand.
Forecast Trend Report by Period
Stablecoins are emerging as a key payment method as AI agents begin acting as direct buyers of data, computing power and online services.
CoinDesk reported on Aug. 22 that major crypto and payments companies including Coinbase, Circle, MoonPay, Visa, Mastercard and Cloudflare are building payment infrastructure for AI agents. These software programs can carry out multistep tasks on their own based on user instructions, including purchasing data or computing resources along the way.
Coinbase's AI-agent payment protocol, x402, has processed more than 165 million payments this year, with cumulative volume topping $50 million. The system allows an AI agent to check a service price, pay directly and receive the result without creating a separate account or entering card details.
Stablecoins make up a dominant share of the early AI-agent payments market. Lincoln Murr, Coinbase's head of AI product, estimated that about 99% of payments through x402 have been made in USDC, the dollar-backed stablecoin. So far, the main use has been micropayments for API calls and access to data and computing resources rather than purchases of goods.
"The clearest use case right now is machine-to-machine payments where AI agents pay for APIs," Murr said. Because AI agents move quickly across the internet, they need a standardized way to make payments, he added. Coinbase counted more than 480,000 AI agents in the x402 ecosystem as of April.
Stablecoins can be transferred around the clock and are better suited than card payments for small, frequent transactions. Stephanie Cohen, chief strategy officer at Cloudflare, said stablecoins are particularly well suited for very small and frequent payments for API calls, data, AI inference and content.
Card networks, however, are also competing for a role in the AI-agent market. Mastercard is testing a system that sets spending limits and purchase categories in advance for agents, while Visa and DBS have run experiments in which AI agents buy goods with credit and debit cards. Existing card networks still have an edge in larger payments because they offer broad merchant networks as well as credit, refund and dispute-resolution systems.
Murr compared the current AI-agent payments market to the "Napster and LimeWire era" of the early internet. Payment volumes remain small for now. But if AI agents increasingly make small purchases of multiple data sources and services to complete a single task, stablecoins could become a main tool for machine-to-machine payments.
