Vellium & Co

Directory › Blockchain reads › AllowanceGuard

AllowanceGuard

Decide whether to grant an ERC-20, NFT or Permit2 allowance before signing it. Send owner, token, spender and amount, or the unsigned approve, setApprovalForAll or Permit2 calldata. Returns allow, warn, block or unknown with the allowance a

Go to this service →

Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
282 ms
Price
$0.030 per call
Paying buyers, last 30 days
2 (directory's own records)
Paid calls, last 30 days
27
Category
Blockchain reads
Address
https://allowance.schemasure.com/v1/guard/allowance

Accuracy

Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.

For agents

This page as JSON: /sellers/e34090e9c915.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].