api.onesource.io
ERC20 token balance for any Ethereum wallet - USDC, USDT, DAI, or any token - via balanceOf (eth_call) on OneSource live Ethereum RPC
- Category
- Crypto & DeFi
- Starting price
- $0.001
- Paid calls · 30 days
- 10K
- Unique payers · 30 days
- 9.8K
Paid endpoints
70 endpoints, sorted by usage. Prices are per request.
- GET/api/chain/erc20-balance
ERC20 token balance for any Ethereum wallet - USDC, USDT, DAI, or any token - via balanceOf (eth_call) on OneSource live Ethereum RPC
$0.003Base482calls / 30d - GET/api/chain/block-number
Latest Ethereum block height - current chain tip via eth_blockNumber
$0.001Base477calls / 30d - GET/deepstate/v1/book/:book
Deepstate, the on-chain order-book exchange on Robinhood Chain. Order-book snapshot for a market, bids descending and asks ascending, with live resting size per level.
$0.005Base416calls / 30d - GET/deepstate/v1/candles/:book
Deepstate, the on-chain order-book exchange on Robinhood Chain. OHLCV candles for a market.
$0.005Base394calls / 30d - GET/deepstate/v1/stats/:book
Deepstate, the on-chain order-book exchange on Robinhood Chain. Rolling 24h / 7d / 30d volume and price change for a market.
$0.005Base393calls / 30d - GET/api/chain/live-balance
Live wallet balance - native ETH plus up to 20 caller-supplied ERC20 tokens in one bounded RPC batch
$0.003Base393calls / 30d - GET/api/chain/contract/:address
Best-effort contract introspection via batched RPC - bytecode presence, token metadata, and ERC20-like/ERC721/ERC1155 classification
$0.005Base362calls / 30d - GET/api/chain/erc20-transfers
ERC20 Transfer logs via eth_getLogs - raw Transfer events for a token or wallet
$0.005Base360calls / 30d - GET/api/chain/total-supply
Total supply of an ERC20 or ERC721 token contract via totalSupply (eth_call)
$0.003Base332calls / 30d - GET/api/chain/ens/:input
ENS resolve - turn a .eth name into an address, or an address into its primary .eth name, via eth_call on OneSource live Ethereum RPC
$0.005Base319calls / 30d - GET/api/chain/nonce/:address
Next transaction nonce for any Ethereum wallet via eth_getTransactionCount - how many txs it has sent
$0.003Base308calls / 30d - GET/api/chain/network-info
EVM network info - chain ID, block height, gas price, chain head age, and chain characteristics in one batched RPC call (eth_chainId + eth_blockNumber + eth_gasPrice + latest block header)
$0.001Base294calls / 30d - GET/api/chain/block/:number
Fetch an Ethereum block header and transaction hashes by number, tag, or hex via eth_getBlockByNumber
$0.003Base282calls / 30d - GET/api/chain/events
Query Ethereum contract event logs via eth_getLogs - filter by contract, topic, and block range
$0.005Base251calls / 30d - GET/api/chain/tx/:hash
Full Ethereum transaction details by hash via eth_getTransactionByHash - from, to, value, calldata, block
$0.008Base251calls / 30d - GET/deepstate/v1/markets
Deepstate, the on-chain order-book exchange on Robinhood Chain. Lists the markets this service serves with their token layout (base, quote, token0/token1, decimals).
$0.005Base220calls / 30d - GET/deepstate/v1/trades/:book
Deepstate, the on-chain order-book exchange on Robinhood Chain. Trade tape for a market, newest first.
$0.005Base217calls / 30d - GET/api/chain/chain-id
Ethereum chain ID (EIP-155) via eth_chainId - confirm which chain a network is on
$0.001Base210calls / 30d - GET/api/chain/erc721-tokens
List every ERC721 NFT token_id a wallet owns in a collection via tokenOfOwnerByIndex (eth_call)
$0.008Base197calls / 30d - GET/api/chain/nft-metadata
NFT metadata for ERC721 or ERC1155 tokens via eth_call, with IPFS, Arweave, data URI, and public HTTP(S) resolution
$0.008Base197calls / 30d - GET/api/chain/allowance
ERC20 allowance via allowance (eth_call) - how much a spender is approved to move from an owner's wallet
$0.003Base191calls / 30d - GET/api/chain/receipt/:hash
Transaction receipt via eth_getTransactionReceipt - status, gas, and event logs for a mined Ethereum transaction
$0.005Base189calls / 30d - GET/api/chain/code/:address
Check if an Ethereum address is a contract via eth_getCode - returns deployed bytecode
$0.003Base186calls / 30d - POST/api/chain/call
Simulate a read-only Ethereum contract call via eth_call - no transaction sent
$0.005Base177calls / 30d - POST/api/chain/estimate-gas
Estimate the gas a transaction will consume via eth_estimateGas before signing it
$0.004Base175calls / 30d - GET/deepstate/v1/analytics/makers
Deepstate, the on-chain order-book exchange on Robinhood Chain. Per-maker time-at-top, notional rested, fills, and maker rewards earned for a market (token varies by market; see /deepstate/v1/markets).
$0.02Base171calls / 30d - GET/deepstate/v1/analytics/depth-history
Deepstate, the on-chain order-book exchange on Robinhood Chain. Depth heatmap - resting order size by price level over time for a market.
$0.02Base163calls / 30d - GET/deepstate/v1/analytics/cost-to-quote
Deepstate, the on-chain order-book exchange on Robinhood Chain. Gas spent resting and cancelling orders for a market.
$0.02Base149calls / 30d - GET/api/chain/nft-owner
Look up the current owner of an ERC721 NFT by token_id via ownerOf (eth_call)
$0.003Base115calls / 30d - GET/api/chain/erc1155-balance
ERC1155 token balance via balanceOf (eth_call) - how many copies of a token_id a wallet holds
$0.003Base112calls / 30d - GET/api/chain/storage
Read a raw storage slot from any Ethereum contract via eth_getStorageAt
$0.005Base110calls / 30d - GET/api/chain/proxy/:address
Detect upgradeable proxy patterns (EIP-1967, UUPS, Transparent) via eth_getStorageAt - returns the implementation address behind a proxy
$0.005Base107calls / 30d - GET/standard/v1/pool
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Latest AMM pool state: price, tick, liquidity, reserves. reserve_eth_raw and reserve_std_raw are 18-decimal token amounts; divide them by 1e18. sqrt_price_x96_raw is Q64.96, and liquidity_raw is Uniswap liquidity rather than a token amount.
$0.02Base98calls / 30d - GET/standard/v1/exit-pressure/current
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Current exit-pressure gauge across the reserve. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base98calls / 30d - GET/standard/v1/vaults/current
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Latest expansion and contraction vault WETH balances, plus protocol-owned liquidity once observed on-chain. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base93calls / 30d - GET/standard/v1/auctions/current
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Current Dutch-auction quotes for the daily STANDARD license auction and the ETH charter auction: price now, floor, last sale, and whether a computed price is available. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base92calls / 30d - GET/standard/v1/supply/current
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Latest supply ledger: cumulative minted and burned totals, circulating supply, and max supply. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base90calls / 30d - GET/standard/v1/branches/summary
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Summary across reserve branches. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base87calls / 30d - GET/standard/v1/backing/current
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. A snapshot of reserve backing: vault ETH balances, other reserve-asset holdings, and ETH backing per circulating STANDARD token. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base83calls / 30d - GET/standard/v1/flow/hourly
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Hourly ETH in/out and net flow through the STANDARD/ETH pool. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base78calls / 30d - GET/standard/v1/policy/current
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. The current epoch's regime (expansion or contraction), signal, policy multiplier, net ETH flow and STANDARD issuance, plus time to epoch close. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base78calls / 30d - GET/standard/v1/branches/auction/live
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Live Branch license auction state, read straight from the chain.
$0.02Base76calls / 30d - GET/standard/v1/tax/schedule
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. The launch tax hook's current buy and sell rates, its decay schedule, and a projection of where the rate is headed. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base72calls / 30d - GET/standard/v1/candles
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. OHLC price candles for the STANDARD/ETH pool, priced in ETH per STANDARD.
$0.02Base71calls / 30d - GET/standard/v1/exit/fee-curve
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. How the reserve's exit fee changes across a range of withdrawal sizes, checked two ways: a live contract read and this service's own formula. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base69calls / 30d - GET/api/chain/pending
Pending block - transactions not yet mined, via eth_getBlockByNumber("pending")
$0.01Base67calls / 30d - GET/standard/v1/policy/outlook
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. A current-pace projection of the Central Bank's policy multiplier and issuance rate if the current epoch's net flow direction holds until close. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base66calls / 30d - GET/standard/v1/charters
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Charters, optionally filtered by owner. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.005Base66calls / 30d - GET/standard/v1/exit/fee-forecast
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. A current-pace projection of the reserve's exit fee assuming no further withdrawals, day by day until it reaches the minimum rate. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base64calls / 30d - GET/standard/v1/issuance/runway
The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Cumulative STANDARD issuance against its budget, the current issuance rate, and a current-pace projection of when the budget runs out. Fields ending in _raw are 18-decimal integers as strings. Divide by 1e18 to get token amounts.
$0.02Base64calls / 30d