45 Services from api.onesource.io

Returns the ERC-1155 NFT token balance for a given wallet address, contract, and token ID on Ethereum mainnet or Sepolia testnet

Fetches on-chain Ethereum event logs filtered by contract address, topic hash, and block range on mainnet or Sepolia testnet

Retrieves ERC-20 token transfer events for a specific token contract and/or wallet address on Ethereum mainnet or Sepolia testnet over a specified block range

Fetches the on-chain transaction receipt for a given Ethereum or Sepolia transaction hash, including status, gas used, logs, and block details.

Estimates the gas required to execute an Ethereum transaction given recipient, calldata, sender, and optional value

Returns all ERC-721 (NFT) token IDs owned by a given address for a specific contract on Ethereum mainnet or Sepolia testnet

Returns a full order-book snapshot for a named market, with bids sorted descending and asks sorted ascending, including summary statistics like spread and mid price

Returns recent matched trades (fills) for a specific on-chain order book on the Deepstate decentralized exchange, including price, amounts, sides, and block-level metadata.

Fetches on-chain contract metadata (name, symbol, decimals, ERC interface support) for a given Ethereum or Sepolia contract address

Returns a time-series heatmap of resting order sizes by price level for a given order book market, with configurable time range and resolution

Fetches the mined transaction receipt for a given Ethereum transaction hash, returning status, gas used, and emitted event logs via eth_getTransactionReceipt

Resolves an ENS .eth name to its Ethereum address, or reverse-resolves an Ethereum address to its primary .eth name, via live eth_call on the Ethereum network.

Returns OHLCV candlestick data for a Deepstate on-chain order book at a specified timeframe and optional date range

Resolves an ENS name (e.g. vitalik.eth) or Ethereum address to its canonical Ethereum address on mainnet or Sepolia testnet

Detects upgradeable proxy patterns (EIP-1967, UUPS, Transparent) on Ethereum contracts and returns the underlying implementation address

Returns the total supply of an ERC20 or ERC721 token contract by calling the totalSupply function on-chain via eth_call

Reads a raw storage slot value from an Ethereum smart contract at a specified block on mainnet or Sepolia testnet

Returns the current latest block number for Ethereum mainnet or Sepolia testnet from OneSource-operated nodes

Fetches an Ethereum block header and its transaction hashes by block number, tag, or hex value via eth_getBlockByNumber

Executes a raw Ethereum eth_call against a contract on mainnet or Sepolia testnet, returning the encoded result

Returns the current owner address of a specific ERC721 NFT by calling ownerOf on-chain via eth_call

Returns the next transaction nonce (transaction count) for any Ethereum wallet address via eth_getTransactionCount

Fetches OHLCV (open, high, low, close, volume) candlestick data for a specified trading book/market at a given timeframe

Returns rolling 24h, 7d, and 30d volume and price change statistics for a specified Deepstate order book market

Returns how many tokens a spender is approved to transfer from an owner's wallet for a given ERC20 token contract on Ethereum or Sepolia.

Returns the EIP-155 chain ID for Ethereum mainnet or Sepolia testnet via eth_chainId RPC call

Returns the current Ethereum network state — chain ID, latest block number, and current gas price — in a single batched RPC call

Fetches NFT metadata, traits, and image URI for any ERC721 or ERC1155 token on Ethereum via eth_call with IPFS resolution

Returns per-maker time-at-top-of-book, notional rested, fill counts, fill rate, and DEEP rewards earned for a specified Deepstate market book.

Returns deployed bytecode for an Ethereum address to determine whether it is a smart contract or an externally owned account (EOA)

Returns the native ETH balance plus balances of any specified ERC20 tokens for a given Ethereum wallet address in a single API call.

Returns the ERC20 token balance for any Ethereum wallet address by calling balanceOf on-chain via live Ethereum RPC

Returns the on-chain trade history (tape) for a specific Deepstate order book market, sorted newest first, with full execution details per trade.

Returns the current pending block data (hash, number, transaction count) for Ethereum mainnet or Sepolia testnet

Fetches full Ethereum transaction details (from, to, value, calldata, block) by transaction hash using eth_getTransactionByHash

Retrieves name, symbol, decimals, and ERC20/721/1155 interface support for a smart contract address via eth_call

Returns aggregated on-chain market statistics (OHLC, VWAP, volume, trade count, price change) for a Deepstate order-book over 24h, 7d, and 30d windows

Retrieves the full live on-chain order book (bids and asks) for a specified Deepstate market, including order details, depth summary, and market session info.

Returns the transaction count (nonce) for an Ethereum address at a specified block on mainnet or Sepolia testnet

Fetches the deployed bytecode and contract metadata for an Ethereum address on mainnet or Sepolia testnet

Retrieves full on-chain transaction details for a given Ethereum transaction hash on mainnet or Sepolia testnet

Fetches on-chain block data (hash, number, gas used, timestamp, parent hash) for a given block number or tag on Ethereum mainnet or Sepolia testnet

Looks up Ethereum contract metadata (proxy status, implementation address) for a given contract address on mainnet or Sepolia testnet

Returns gas cost analytics (fees, rests, cancels) for resting and cancelling orders on a Deepstate order book market, bucketed by time period

Returns all Deepstate markets with their token layout, contract addresses, pool IDs, and deployment metadata