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ERC-20 allowance (owner to

How much of an ERC-20 token a spender contract is approved to move from an owner wallet - the approval check an agent runs before a swap, a bridge, or an x402 transferWithAuthorization flow. Returns the allowance as an exact decimal string

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Our latest check (2026-10-11)

Answering
Yes — valid x402 payment terms
Time to answer
197 ms
Price
$0.002 per call
Paying buyers, last 30 days
4 (directory's own records)
Paid calls, last 30 days
5
Category
Blockchain reads
Address
https://agent402.tools/api/token-allowance

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/d76a1a197a91.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].