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Base

Key player

Coinbase’s L2 — default settlement chain for x402 demos.

Settlement & Identity Rails x402USDC

What Base builds for agent payments

When docs say “deploy on Base Sepolia” they mean this chain. Production agent micropayments often start on Base mainnet for the same reason: cost and ecosystem density.

On mpp.best

x402 testnet on Base Sepolia →Base projects →

Open-source projects

No org-matched repos in the directory yet — browse the protocol categories instead.

Payment protocols → Full directory →

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