Vellium & Co

Directory › Payments and on-ramps › Safe Approve Builder

Safe Approve Builder

Unlimited allowances are the #1 drain vector, and agents reach for approve(max) on every swap. This builds ready-to-sign calldata for an approval of EXACTLY the amount you need (via the token's decimals) and refuses unlimited unless forced.

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
447 ms
Price
$0.020 per call
Paying buyers, last 30 days
1 (directory's own records)
Paid calls, last 30 days
1
Category
Payments and on-ramps
Address
https://402.com.tr/api/x402/safe-approve

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/98a0c471b751.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].