Vellium & Co

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quartermaster.surewhynot.app

Decode a Base transaction's calldata into a human-readable function call and arguments — ERC-20 transfer/approve and the EIP-3009 transferWithAuthorization used by x402 settlements. Recognizes x402 settlement transactions.

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
465 ms
Price
$0.003 per call
Paying buyers, last 30 days
3 (directory's own records)
Paid calls, last 30 days
3
Category
Blockchain reads
Address
https://quartermaster.surewhynot.app/v1/tx-decode

Accuracy: paid answers checked against an independent record

Not yet in our paid checks. A seller we have not checked has neither passed nor failed.

For agents

This page as JSON: /sellers/c6331963b309.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).

Sellers can see the evidence behind their checks and ask for a re-check at [email protected].