AIMarket

modelmarket.dev · x402

Debug an x402 payment before you submit it — why does USDC answer invalid signature? Verifies the EIP-3009 transferWithAuthorization (EIP-712 signer, v, low s, validity window) and the seller's terms (payTo, amount, asset, network, bound nonce), and names the domain a failing signature was really made for, e.g. Base Sepolia's 'USDC' used for Base mainnet's 'USD Coin', the commonest reason an x402 payment reverts. Offline, deterministic, signed answer.

Name and description as published by x402 Bazaar

Live

Last successful check: 26 Oct 2026, 06:23 UTC.

answered, last 24 hours: 100%
answered, last 30 days: 100%

3 different wallets paid it in the last 30 days, as the x402 Bazaar reports. Payments

How addrbook checks →

Connect

https://modelmarket.dev/x402/x402-check

x402: an unpaid request gets a 402 with the price and pay-to wallet. addrbook never pays.

Who's behind it

Listed by: x402 Bazaarlast seen 26 Oct, 05:59 UTC
Wallets named: 0x1218ff36c5d2e3b6a565cdb1a8b1accfc606ad0anamed by x402 Bazaar
Listed since: 25 Oct 2026, 17:51 UTC

Payments

different wallets paid it, last 30 days: 3
paid calls, last 30 days: 4
last paid call (UTC): 24 Oct, 21:33

As the x402 Bazaar reports, from payments Coinbase's facilitator settled. Read 26 Oct 2026, 05:59 UTC. addrbook has not counted these payments itself.

How it asks to be paid

Network	Price	Paid in	Settled by	Pays to
Base	$0.003	USDC	Per request	0x1218ff36c5d2e3b6a565cdb1a8b1accfc606ad0a

From its own 402 answer at 26 Oct, 06:23 UTC. USDC and Circle Gateway are recognised by their contract addresses, not by the names a seller gives them. How payments are read

Checks by endpoint

Host	Protocol	State	Last checked (UTC)	Last answered (UTC)	24 hours	30 days	Tools
modelmarket.dev	x402	Live	26 Oct, 06:23	26 Oct, 06:23	100%	100%	—

Also listed as

Other entries that share an endpoint with this one.

modelmarket.dev