One interface, seven chains, zero context switching.

Wallet balances, transaction history, token holdings and OFAC sanctions screening — Ethereum, Base, Arbitrum, Optimism, Polygon, Bitcoin and Solana, all through one consistent tool shape.

$ read the docs llms.txt for agents

chainsscope.duckdns.org

$ curl -s https://chainsscope.duckdns.org/tools/wallet-scan \

-X POST -d '{"chain":"base","address":"0x…"}'

HTTP/1.1 402 Payment Required

accept: 0.04 USDC on eip155:8453 -> 0x1c4A…e29

# client settles, retries with proof of payment

HTTP/1.1 200 OK

{

"chain": "base",

"balance_usd": 1842.30,

"ofac_flag": false

}

// how it works

no signup · no API key

01 / call

Hit the endpoint

Your agent calls any tool below over plain HTTP, or via the MCP server at /mcp/.

02 / settle

402, then one round-trip

You get an x402 payment challenge. Your client settles it in USDC on Base or Solana, automatically.

03 / receive

200, with your data

The retried request carries proof of payment and returns the real result. No accounts, no invoices.

// tools & pricing

$0.01 – $0.04 per call

x402 PAID

wallet_balancePOST /tools/wallet-balance $0.01
wallet_balance_batchPOST /tools/wallet-balance/batch $0.02
tx_lookupPOST /tools/tx-lookup $0.01
tx_receiptPOST /tools/tx-receipt $0.01
fee_estimatePOST /tools/fee-estimate $0.01
gas_estimatePOST /tools/gas-estimate $0.01
contract_inspectPOST /tools/contract-inspect $0.01
is_contractPOST /tools/is-contract $0.01
proxy_checkPOST /tools/proxy-check $0.01
token_holdingsPOST /tools/token-holdings $0.01
token_balance_singlePOST /tools/token-balance $0.01
token_allowancePOST /tools/token-allowance $0.01
token_supplyPOST /tools/token-supply $0.01
token_transfersPOST /tools/token-transfers $0.02
address_activityPOST /tools/address-activity $0.015
noncePOST /tools/nonce $0.01
chain_tipPOST /tools/chain-tip $0.01
chain_infoPOST /tools/chain-info $0.01
block_lookupPOST /tools/block-lookup $0.01
ens_resolvePOST /tools/ens-resolve $0.01
nft_ownerPOST /tools/nft-owner $0.01
nft_balancePOST /tools/nft-balance $0.01
nft_metadataPOST /tools/nft-metadata $0.015
wallet_scanPOST /tools/wallet-scan $0.04

settled instantly · USDCBase & Solana

ETHBASEBTCSOLARBOPPOLYGON