Arbitrum

EVM chain

Arbitrum

Arbitrum is part of Dexter's production EVM settlement footprint. Same facilitator, same API shape — use it when your users or treasury already live on Arbitrum.

Network ID

Token Details

Settlement Model

Same EVM settlement path as all other Dexter EVM chains:

• EIP-3009 transferWithAuthorization (default for USDC)
• Recipient, token, amount, and timing validation
• Facilitator submits the transaction and pays gas

Permit2 is also available. The facilitator signals assetTransferMethod: "permit2" in the /supported response, enabling payments with any ERC-20 token. The one-time Permit2 approval costs the payer a small amount of ETH (~$0.001). After that, every Permit2 payment is gasless. The facilitator can relay the approval via the erc20ApprovalGasSponsoring extension.

There is no Arbitrum-specific settlement logic. The API shape is identical to Base, Polygon, Optimism, and Avalanche.

Best Fit

• teams already operating on Arbitrum
• products whose buyers already fund from Arbitrum
• merchants adding Arbitrum to a multi-chain EVM deployment

Quick Support Check

curl -s https://x402.dexter.cash/supported | jq '.kinds[] | select(.network == "eip155:42161")'

Validate Before Shipping

1. Confirm you are using the correct Arbitrum network identifier (eip155:42161).
2. Confirm the payment asset is USDC (0xaf88d065e77c8cC2239327C5EDb3A432268e5831).
3. Test POST /verify and POST /settle with a real Arbitrum-targeted payment.

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