Accept USDC on Arbitrum.

USDC on Arbitrum combines Circle's regulated stablecoin with the most popular Ethereum rollup. Native USDC issuance ensures no bridging risks. PYMSTR accepts native USDC only.

Arbitrum One is the largest Ethereum Layer 2 by total value locked, and that depth is the point. It runs on the Nitro stack as an optimistic rollup: transactions execute on Arbitrum and settle back to Ethereum, inheriting Ethereum's security through fraud proofs while gas stays around $0.10 and finality lands near 2 seconds. Because Arbitrum hosts the deepest DeFi liquidity of any rollup, a large share of active stablecoin holders already keep USDC there. For a merchant, that removes the hardest step in stablecoin checkout: the customer is funded on the right chain already, so there is no bridging and no wallet juggling before they can pay. The fee sits slightly above ultra-cheap chains like Polygon, but it buys Ethereum-grade settlement guarantees, which matters for larger payments. One caveat worth knowing: Arbitrum has two USDC tokens in circulation. Native USDC, issued directly by Circle, and the older bridged USDC.e that was moved over from Ethereum. PYMSTR accepts native USDC only. Native has largely superseded USDC.e since Circle's rollout, so most holders already have the right one, but the distinction is worth a glance.