Blockchain intelligence · settled on Base
Verified blockchain data, paid per request.
A small catalogue of precise, machine-readable lookups. Paid responses are produced and checked after payment.
Payment protocol
x402
Settlement
USDC on Base
Product standard
Bounded, reconciled output
Current catalogue
Browse all 19 listed lookups.
Each row links to a valid example request. Inspect the HTTP 402 terms, then retry with an x402 payment. Address-label misses return free without a challenge.
Address intelligence
Sanctions address screeningExact-address screening against public-source EU, OFAC, and UK sanctions wallet observations; entity names omitted.0.005 USDCHit-conditional address labelsExact Ethereum, Bitcoin, and Tron public-source labels. Exact misses are free and only known hits receive a payment challenge.0.001 USDC on hit; misses free
Chain records
Bitcoin address clusterOne heuristic cluster assignment for an exact Bitcoin address; not proof of ownership or identity.0.003 USDCBitcoin Cash address clusterOne heuristic cluster assignment for an exact Bitcoin Cash address; not proof of ownership or identity.0.003 USDCDogecoin address clusterOne heuristic cluster assignment for an exact Dogecoin address; not proof of ownership or identity.0.003 USDCLitecoin address clusterOne heuristic cluster assignment for an exact Litecoin Base58Check address; not proof of ownership or identity.0.003 USDCCardano transactionOne bounded Cardano mainnet transaction and its block fields for an exact transaction hash.0.003 USDCCardano stake rewardsUp to 100 newest Cardano mainnet stake rewards for one exact stake address, reward type, and bounded earned-epoch range.0.003 USDCSolana transactionOne bounded public Solana mainnet transaction for an exact canonical base58 signature and slot.0.003 USDCXRP transactionOne bounded public XRP mainnet transaction for an exact hash, ledger number, and transaction index.0.003 USDCEthereum complex flowUp to 100 newest public Ethereum aggregate flow observations for one exact address pair, asset, and bounded block range.0.003 USDCArbitrum token transfersUp to 100 newest public Arbitrum token transfers for one exact asset and bounded block range.0.003 USDC
Markets
Kraken OHLCV candlesUp to 100 newest historical Kraken OHLCV candles for an exact period/base/quote tuple.0.001 USDCKraken top-of-book snapshotBest bid, best ask, and spread for one exact historical Kraken timestamp/base/quote key.0.001 USDCMulti-exchange top-of-book snapshotOne normalized best bid, best ask, and spread snapshot or exact miss for an allowlisted exchange/timestamp/base/quote key.0.001 USDCMulti-exchange historical candlesUp to 100 newest multi-exchange historical OHLCV candles for an exact exchange/period/base/quote tuple.0.001 USDC
Network state
Base address snapshotETH and canonical Base USDC balances, reconciled across two RPC providers at one block.0.001 USDCBase network statusBase block number, hash, and time reconciled after payment against two pre-probed distinct-operator endpoints.0.001 USDCEVM native-balance snapshotNative balance at one common block, reconciled after payment against two pre-probed distinct-operator endpoints from the local registry.0.001 USDC
Agent interface
Inspect first. Pay only for listed resources.
Use the discovery documents to inspect the contract programmatically. Every paid lookup returns a standard x402 challenge before payment. New to the protocol? Pay with an x402 client ↗.
HTTPSpublic interface
$ curl https://obol.danieldutoit.net/health { "status": "ok", "service": "obol", "network": "eip155:8453" }