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What is USDC on Base, and how is it different from USDC elsewhere?
Matched: “What is USDC on Base, and how is it different from USDC elsewhere?”
USDC is a dollar-backed stablecoin issued by Circle — one USDC is redeemable for one dollar, with roughly $70 billion in circulation. Base is a network Coinbase built on top of Ethereum, designed to make transactions fast and nearly free. 'USDC on Base' just means dollars that move at internet speed for a fraction of a cent per transfer. The same USDC exists on other chains — Ethereum mainnet, Solana, Polygon — and it's the same dollar everywhere; what changes is the cost and speed of moving it. Base became x402's home turf because Coinbase built both, and because sub-cent fees are the whole point when an agent is making thousands of small payments. One practical note: USDC on one chain isn't automatically spendable on another — if a service wants USDC on Base, your wallet needs USDC on Base specifically, not the same balance sitting on Ethereum.
Compact, for agents: USDC: Circle-issued fiat-backed stablecoin (~$70B cap). Base: Coinbase's Ethereum L2, sub-cent fees, primary x402 settlement chain. Chain-specific balances — USDC on Base ≠ USDC on Ethereum for payment purposes.
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