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three.ws Permit2 + EIP-2612 Gas-Sponsored USDC Payment Demo
x402
three.ws Permit2 + EIP-2612 Gas-Sponsored USDC Payment Demo is a paid API for AI agents from three.ws, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Demonstrates gasless USDC payment on Base mainnet using EIP-2612 permit and Permit2 transfer settled atomically in a single transaction by the x402ExactPermit2Proxy, returning the on-chain tx hash and Basescan link.
Price / call$0.001
Success—
StatusUnknown
How this service works
Permit2 + EIP-2612 Gas Sponsoring Demo — forces the gasless Permit2 path so a fresh wallet holding USDC but ZERO ETH can complete the flow. The CDP facilitator submits the EIP-2612 permit and the Permit2 transfer atomically in a single transaction via x402ExactPermit2Proxy.settleWithPermit. The response carries the on-chain tx hash + Basescan link so callers can confirm the permit + transfer landed together. Pay $0.001 USDC on Base mainnet.
Output
Returns a JSON object with ok:true, demo identifier 'permit2-eip2612-gas-sponsoring', the settlement method ('permit2'), the payer address, network name, asset, amount in atomics, on-chain transaction hash, a Basescan explorer URL for the transaction, the settlement timestamp (ISO 8601), whether the asset supports EIP-2612, and the canonical x402ExactPermit2Proxy contract address that settled the combined permit + transfer atomically.
Example use cases
Example prompt
“Run the gasless Permit2 + EIP-2612 demo on three.ws — I have a fresh wallet with USDC but no ETH, and I want to see the atomic permit2 settlement go through on Base mainnet with the tx hash and Basescan link.”
Technical details
Endpoint
GEThttps://three.ws/api/x402/permit2-paid-demoWhen to prefer
Use this endpoint when you need to demonstrate or test a fully gasless USDC payment flow on Base mainnet where the wallet holds no ETH, relying on EIP-2612 permit + Permit2 for atomic gas-sponsored settlement via the x402 protocol. Prefer this over standard x402 payment demos when the zero-ETH wallet constraint is the specific scenario being validated.
Side effects
- Insufficient USDC balance in payer wallet — payment cannot be settled
- EIP-2612 permit signature invalid or expired — atomic settlement fails
- Permit2 allowance not set or insufficient — transfer reverted
- Base mainnet RPC unavailable — transaction cannot be submitted
- x402ExactPermit2Proxy contract error — atomic settlement reverts on-chain
- Rate limit or facilitator error — 402 or 429 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"demo": "permit2-eip2612-gas-sponsoring",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payer": "0x4022de2d36c334e73c7a108805cea11c0564f402",
"proxy": "0x402085c248EeA27D92E8b30b2C58ed07f9E20001",
"method": "permit2",
"network": "eip155:8453",
"explorer": "https://basescan.org/tx/0x9c0a7e5ad5c9c0bb6f04f6ad9c52f4f44bb6c5d9c0a7e5ad5c9c0bb6f04f6ad9",
"settledAt": "2026-05-21T18:30:00.000Z",
"transaction": "0x9c0a7e5ad5c9c0bb6f04f6ad9c52f4f44bb6c5d9c0a7e5ad5c9c0bb6f04f6ad9",
"amountAtomics": "1000",
"supportsEip2612": true
}
}Tags
x402
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