If you ask "which L2 is the right one for U.S. consumer commerce?" the answer for an increasing number of merchants is Base. The chain was launched by Coinbase, runs on the OP Stack, and inherits one practical advantage that no other L2 has: a path from Coinbase exchange to L2 wallet that's smoother than the alternatives.
MixPay routes Base as a first-class L2 alongside Arbitrum and Optimism.
What Base actually is, briefly
A short orientation, since L2 nomenclature has gotten dense:
- Base is an Ethereum L2, built on the OP Stack — the same stack that powers Optimism. Transactions settle to Ethereum mainnet via the standard rollup architecture.
- Native asset is ETH, not a separate L2 token. Gas is paid in ETH; there's no MATIC/POL/AVAX equivalent on Base.
- Native USDC issuance by Circle. Not a bridged USDC.e — actual native USDC on the chain, with the operational implications that follow (no bridge dependence, direct redemption path).
- Operated by Coinbase. That has practical consequences for the customer onboarding path that don't apply to other L2s.
For merchants, the Coinbase relationship is the point. A U.S. consumer with a Coinbase account can move funds from exchange to an on-chain Base wallet in a flow that Coinbase has invested specifically in making short. That on-ramp shape is what makes Base distinctive among L2s.
What MixPay routes on Base
- ETH on Base, the native asset.
- USDC on Base, native Circle issuance.
- USDT on Base for merchants whose customers prefer that denomination.
The customer's wallet picks the rail; the merchant settles in their chosen stablecoin.
Where Base makes the difference
Three patterns where Base specifically beats other L2 options:
- U.S. retail e-commerce. A meaningful fraction of U.S. retail crypto buyers fund through Coinbase. Base is the L2 their funds are most likely to already be on.
- Coinbase-app-anchored commerce. Coinbase Wallet (the self-custody product) defaults to Base for many on-chain interactions, which means Base addresses appear in customers' wallet histories more than other L2 addresses.
- USDC-denominated subscriptions. Native USDC on Base + low gas + recurring charge cadence = a clean subscription model that doesn't get punished by gas swings.
For non-U.S. customer bases, Base is still a perfectly good L2 — the cost and speed advantages are the same as any OP Stack chain. But the Coinbase integration is what makes it distinctive, and that advantage is most concentrated where the Coinbase user base is most concentrated.
How this fits the MixPay rollup roster
MixPay routes ETH and the major stablecoins on three Ethereum L2s: Optimism, Base, and Arbitrum (Optimism and Base both run on the OP Stack; Arbitrum uses a different stack but fits the same operational pattern). The merchant-side experience is identical across all three — see also Layer 2 payment support on Arbitrum and Optimism for the earlier roll-out, and Ethereum mainnet support when you need the L1 default rather than an L2.
- Customer picks the asset and chain in their wallet.
- MixPay confirms the L2 transaction.
- Real-time conversion to the merchant's settlement asset.
- One ledger entry per transaction, in the merchant's stablecoin of choice.
For developer integrations, the REST API treats Base as one more network parameter; nothing about the L2 leaks into the merchant's application code.
The chain coverage in context
MixPay's published chain-distribution data shows Base's volume share growing as the broader Coinbase consumer base activates more on-chain spending. The full asset and chain matrix is on the accept page, and the pricing page covers the unified zero-merchant-fee model that applies on Base alongside every other routed chain.