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httpthirdwebcdp

modelmarket.dev

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.

Resource URL

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

Payment options

exactBase (8453)

$0.003 USDC

Max amount

Pay to
0x1218ff36C5d2e3B6A565CdB1A8B1AcCFc606Ad0a
Timeout
300s

Tags

x402usdceip-3009transferwithauthorizationeip-712

For agents

Prompt snippet for AI agents

Find and pay for this x402 resource:
URL: https://modelmarket.dev/x402/x402-check
Type: http
Sources: thirdweb, cdp

Developer