the402 endpoint detail

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chainsscope.duckdns.org wallet-balance batch

https://chainsscope.duckdns.org/tools/wallet-balance/batch

payable

Check up to 10 wallets in one call -- mix chains freely (e.g. an Ethereum wallet and a Solana wallet in the same request). Cheaper per item than calling wallet-balance that many times separately. A bad address in the batch doesn't fail the whole call -- that item just comes back with an error, the rest still succeed.

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.02
Network
base
Pay to
0x1f5f8474fA0dc1Fde79187abd68Ef8Ea15ADAe34
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
244 ms
Payment options
2 usable of 2
Last checked
2026-08-10T09:10:57.744Z (1d ago)
Category
finance-crypto

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