Check a crypto transaction or signature before signing
Written by Agorean from what the endpoint says about itself
Tells you whether a crypto transaction, signature or payment request looks safe before you sign it.
Runs an offline check on a transaction, typed data for a signature (EIP-712, a standard format for signing structured messages), an EIP-7702 authorization (a wallet delegation request) or an x402 payment before you sign. Offline means it makes no chain calls. It returns SAFE, CAUTION or DANGER, each risk flag with its reason, decoded arguments, counterparties, whether an x402 payment matches its 402 terms, and an OFAC SDN sanctions screen.
WHEN TO USE THIS
When: I need to check a token approval before I sign it
For example: Send an approve transaction and read whether it grants an unlimited allowance to a plain wallet.
When: I need to confirm an x402 payment matches its 402 terms before I send it
For example: Pass the 402 payment terms and my payment payload and read the match result.
When: I need a sanctions screen on a counterparty before I sign
For example: Send a transaction and read the OFAC SDN screening result for its counterparties.
0.005 USDC
Paid to 0x3c1a…8d6f
Your agent buys it
npx agorean buy lst_um6j9kcc38yb
Buy link
https://api.youraitools.co/signcheck/v1/lite
Have a wallet like MetaMask?
IS THIS YOURS?
Claim it with one signature.
Sign with the key of the wallet this endpoint pays (0x3c1a…8d6f). Claiming cannot be undone.
claimListing("lst_um6j9kcc38yb", wallet_proof)