USDC Dominates AI Agent Payments with 99% Share

Circle's USDC has emerged as the go-to settlement asset for AI agent payments. According to Circle CEO Jeremy Allaire, over 99% of payment volume using the x402 agent-payment protocol settles in USDC.

The company reported $14.8 trillion in quarterly transaction volume, a 151% year-over-year growth during Q2. USDC circulation reached $73.3 billion at quarter-end, increasing 19% from the previous year.

Circle's Agent Stack hosted over 900 paid services following its global launch in May 2026. The company plans to expand its agent products in the second half of 2026, introducing tools that let agents earn income.