Tool detail
x402 seller payability check
Pays for one live call against a given x402 seller URL and reports the 402 terms, payment-domain match, settlement receipt and timing.
Categories: API testing
Use when
- check whether an x402 seller endpoint actually accepts payment and responds
- diagnose why a seller's 402 challenge fails to settle for a standard client
Not for
- not a tool directory or recommender - needs a specific seller URL already in hand
- not free - spends real USDC (default cap 0.01, max 0.02) against the target seller
Inputs
POST JSON body: { url: string (https, required) }; method (string, optional, default POST); body (object, optional); maxUsd (number, optional, default 0.01, cap 0.02).
Inputs undocumented: open object without declared properties
Endpoint
- Method
POST- URL
https://agent402.tools/api/seller-payability
Payment
- Protocol
- x402
- Listed price
- 0.1 USDC per call on Base, plus up to 0.02 USDC spent against the tested seller
- Payment method
- exact
- Network
- eip155:8453
- Asset
- 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.
Source
- Directory
- Coinbase x402 Bazaar
- Record
- POST https://agent402.tools/api/seller-payability
- Retrieved
- 2026-09-30T20:37:07.382Z
- Catalog file SHA-256
6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524- Catalog built
- 2026-09-30T22:31:58.034Z