the402 endpoint detail

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chainsscope.duckdns.org tools wallet-scan

https://chainsscope.duckdns.org/tools/wallet-scan

payable

The flagship: balance, token holdings, recent activity, USD portfolio value, and an OFAC sanctions-list check for a wallet, in one call -- across Ethereum, Base, Arbitrum, Optimism, Polygon, Bitcoin, and Solana. Cheaper and simpler than calling wallet-balance + token-holdings + address-activity separately. Sanctions screening only (not a general scam detector) -- an honest, narrower claim, not a v

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.04
Network
base
Pay to
0x1f5f8474fA0dc1Fde79187abd68Ef8Ea15ADAe34
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
739 ms
Payment options
2 usable of 2
Last checked
2026-08-10T09:09:43.536Z (1d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fchainsscope.duckdns.org%2Ftools%2Fwallet-scan"