Gasless transfer authorization builder
Written by Agorean from what the endpoint says about itself
Builds the signable data for a gasless token transfer you authorize yourself.
It builds the EIP-3009 transferWithAuthorization typed data for a gasless USDC transfer on Base, Polygon, Arbitrum, Optimism, Ethereum, Monad, Celo, Avalanche, or Sei. This is the exact EIP-712 object you sign with your own key to authorize an x402 payment. It only constructs the object; it never signs or sends anything, and it never touches your key.
WHEN TO USE THIS
When: I need to authorize a USDC transfer with my own key, not a custodial one
For example: Get the EIP-712 object built for you, then sign it yourself.
When: I need a gasless USDC transfer on a specific chain, like Base or Arbitrum
For example: Request the typed data for that chain from the supported list.
When: I need to build the exact object an x402 payment expects
For example: Use the constructed EIP-3009 authorization instead of assembling it by hand.
When: I do not want a service that ever holds or sends my funds
For example: Rely on it only constructing the data, never signing or broadcasting.
0.003 USDC
Paid to 0xabf4…a9d0
Your agent buys it
npx agorean buy lst_z6i2e4ur7vei
Buy link
https://agent402.tools/api/transfer-authorization
IS THIS YOURS?
Claim it with one signature.
Sign with the key of the wallet this endpoint pays (0xabf4…a9d0). Claiming cannot be undone.
claimListing("lst_z6i2e4ur7vei", wallet_proof)