Polygon

EVM chain

Polygon

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

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 POL (~$0.001). After that, every Permit2 payment is gasless. The facilitator can relay the approval via the erc20ApprovalGasSponsoring extension.

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

Best Fit

• teams already anchored on Polygon
• products whose buyers already hold Polygon-side USDC
• merchants expanding beyond Base while keeping the same EVM payment shape

Quick Support Check

curl -s https://x402.dexter.cash/supported | jq '.kinds[] | select(.network == "eip155:137")'

Validate Before Shipping

1. Confirm you are using the correct Polygon network identifier (eip155:137).
2. Confirm the payment asset is USDC (0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359).
3. Test POST /verify and POST /settle with a real Polygon-targeted payment.

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