chainsscope.duckdns.org publishes 8 machine-payable endpoints over the x402 protocol, priced from $0.002 to $0.04 per call. Each was probed directly; the response code below is what it returned.
| Endpoint | Method | Price | Probe |
|---|---|---|---|
| /tools/address-activity | POST | $0.004 | 200 |
| /tools/contract-inspect | POST | $0.003 | 200 |
| /tools/ens-resolve | POST | $0.01 | 402 |
| /tools/fee-estimate | POST | $0.01 | 402 |
| /tools/token-holdings | POST | $0.003 | 200 |
| /tools/wallet-balance | POST | $0.002 | 200 |
| /tools/wallet-balance/batch | POST | $0.012 | 200 |
| /tools/wallet-scan | POST | $0.04 | 402 |
Recent transaction history for an address, normalized across Ethereum, Base, Bitcoin, and Solana -- direction, counterparty, and value where the chain's data model makes that derivable.
Ethereum/Base only: is this address a contract, and if it looks like an ERC20 token, its name/symbol/decimals via eth_call -- skips the manual ABI-decoding work.
Turn a .eth name into an address, or an address into its primary .eth name -- one endpoint, auto-detects which direction based on the input. Ethereum mainnet only (ENS has no separate Base deployment)…
Current network fee conditions -- gas price (ETH/Base/Arbitrum/Optimism/Polygon), sat/vB fee tiers (Bitcoin), or recent prioritization fees (Solana) -- useful for an agent about to construct a transac…
Token balances for a wallet, with USD value where a price is available: full SPL token enumeration on Solana, or specific ERC20 balances on Ethereum/Base (a verified default watchlist, or your own tok…
Native balance for a wallet address, with one consistent response shape across Ethereum, Base, Bitcoin, and Solana -- no need to integrate each chain's RPC/explorer separately yourself.
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 ba…
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, …