api.onesource.io
api.onesource.io · 70 paid endpoints · listed 2026-10-27
ERC20 token balance for any Ethereum wallet - USDC, USDT, DAI, or any token - via balanceOf (eth_call) on OneSource live Ethereum RPC
livelast check 4 days ago
100%valid x402 answers, 72 h
$42.18USDC received on Base, 7 days
644distinct payers, 7 days
81.0score (0-100)
Paid endpoints
| Method | Endpoint | Price | Networks |
|---|---|---|---|
| GET | api.onesource.io/api/chain/block-number Latest Ethereum block height - current chain tip via eth_blockNumber | $0.001 | Base |
| GET | api.onesource.io/api/chain/chain-id Ethereum chain ID (EIP-155) via eth_chainId - confirm which chain a network is on | $0.001 | Base |
| GET | api.onesource.io/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_gas | $0.001 | Base |
| GET | api.onesource.io/api/chain/allowance ERC20 allowance via allowance (eth_call) - how much a spender is approved to move from an owner's wallet | $0.003 | Base |
| GET | api.onesource.io/api/chain/block/:number Fetch an Ethereum block header and transaction hashes by number, tag, or hex via eth_getBlockByNumber | $0.003 | Base |
| GET | api.onesource.io/api/chain/code/:address Check if an Ethereum address is a contract via eth_getCode - returns deployed bytecode | $0.003 | Base |
| GET | api.onesource.io/api/chain/erc1155-balance ERC1155 token balance via balanceOf (eth_call) - how many copies of a token_id a wallet holds | $0.003 | Base |
| GET | api.onesource.io/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 | $0.003 | Base |
| GET | api.onesource.io/api/chain/live-balance Live wallet balance - native ETH plus up to 20 caller-supplied ERC20 tokens in one bounded RPC batch | $0.003 | Base |
| GET | api.onesource.io/api/chain/nft-owner Look up the current owner of an ERC721 NFT by token_id via ownerOf (eth_call) | $0.003 | Base |
| GET | api.onesource.io/api/chain/nonce/:address Next transaction nonce for any Ethereum wallet via eth_getTransactionCount - how many txs it has sent | $0.003 | Base |
| GET | api.onesource.io/api/chain/total-supply Total supply of an ERC20 or ERC721 token contract via totalSupply (eth_call) | $0.003 | Base |
| POST | api.onesource.io/api/chain/estimate-gas Estimate the gas a transaction will consume via eth_estimateGas before signing it | $0.004 | Base |
| POST | api.onesource.io/api/chain/call Simulate a read-only Ethereum contract call via eth_call - no transaction sent | $0.005 | Base |
| GET | api.onesource.io/api/chain/contract/:address Best-effort contract introspection via batched RPC - bytecode presence, token metadata, and ERC20-like/ERC721/ERC1155 classification | $0.005 | Base |
| GET | api.onesource.io/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 | $0.005 | Base |
| GET | api.onesource.io/api/chain/erc20-transfers ERC20 Transfer logs via eth_getLogs - raw Transfer events for a token or wallet | $0.005 | Base |
| GET | api.onesource.io/api/chain/events Query Ethereum contract event logs via eth_getLogs - filter by contract, topic, and block range | $0.005 | Base |
| GET | api.onesource.io/api/chain/proxy/:address Detect upgradeable proxy patterns (EIP-1967, UUPS, Transparent) via eth_getStorageAt - returns the implementation address behind a proxy | $0.005 | Base |
| GET | api.onesource.io/api/chain/receipt/:hash Transaction receipt via eth_getTransactionReceipt - status, gas, and event logs for a mined Ethereum transaction | $0.005 | Base |
| GET | api.onesource.io/api/chain/storage Read a raw storage slot from any Ethereum contract via eth_getStorageAt | $0.005 | Base |
| GET | api.onesource.io/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 | $0.005 | Base |
| GET | api.onesource.io/deepstate/v1/candles/:book Deepstate, the on-chain order-book exchange on Robinhood Chain. OHLCV candles for a market. | $0.005 | Base |
| GET | api.onesource.io/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, decim | $0.005 | Base |
| GET | api.onesource.io/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. | $0.005 | Base |
| GET | api.onesource.io/deepstate/v1/trades/:book Deepstate, the on-chain order-book exchange on Robinhood Chain. Trade tape for a market, newest first. | $0.005 | Base |
| GET | api.onesource.io/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 intege | $0.005 | Base |
| GET | api.onesource.io/standard/v1/constants The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Chain-read protocol constants: base rate, epoch length, floors, and where each one | $0.005 | Base |
| GET | api.onesource.io/standard/v1/events The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Raw protocol event feed, newest first. | $0.005 | Base |
| GET | api.onesource.io/api/chain/erc721-tokens List every ERC721 NFT token_id a wallet owns in a collection via tokenOfOwnerByIndex (eth_call) | $0.008 | Base |
| GET | api.onesource.io/api/chain/nft-metadata NFT metadata for ERC721 or ERC1155 tokens via eth_call, with IPFS, Arweave, data URI, and public HTTP(S) resolution | $0.008 | Base |
| GET | api.onesource.io/api/chain/tx/:hash Full Ethereum transaction details by hash via eth_getTransactionByHash - from, to, value, calldata, block | $0.008 | Base |
| GET | api.onesource.io/api/chain/pending Pending block - transactions not yet mined, via eth_getBlockByNumber("pending") | $0.01 | Base |
| GET | api.onesource.io/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. | $0.02 | Base |
| GET | api.onesource.io/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. | $0.02 | Base |
| GET | api.onesource.io/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 vari | $0.02 | Base |
| GET | api.onesource.io/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 cha | $0.02 | Base |
| GET | api.onesource.io/standard/v1/auctions/days The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Per-day history for the license or charter Dutch auction: open price, floor, close | $0.02 | Base |
| GET | api.onesource.io/standard/v1/auctions/sales The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Auction sale history, newest first. Fields ending in _raw are 18-decimal integers a | $0.02 | Base |
| GET | api.onesource.io/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, an | $0.02 | Base |
| GET | api.onesource.io/standard/v1/backing/history The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Backing-ratio history, joined against circulating supply as of each snapshot block. | $0.02 | Base |
| GET | api.onesource.io/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. | $0.02 | Base |
| GET | api.onesource.io/standard/v1/branches/doi The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Days of Issuance: how the current license price compares to the pace of new-Branch | $0.02 | Base |
| GET | api.onesource.io/standard/v1/branches/license-cost The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Today's Branch license cost in ETH, compared against the charter auction's own pric | $0.02 | Base |
| GET | api.onesource.io/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 s | $0.02 | Base |
| GET | api.onesource.io/standard/v1/buybacks/readiness The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Whether the contraction vault's next buyback tick can fire, its ETH capacity, coold | $0.02 | Base |
| GET | api.onesource.io/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. | $0.02 | Base |
| GET | api.onesource.io/standard/v1/dormancy The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Wallet last-activity records, flagged reportable once past the dormancy window. | $0.02 | Base |
| GET | api.onesource.io/standard/v1/dormancy/bounties The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Wallets past their reportable dormancy window, ranked by the bounty an outside repo | $0.02 | Base |
| GET | api.onesource.io/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-decima | $0.02 | Base |
| GET | api.onesource.io/standard/v1/exit-pressure/history The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Exit-pressure history. Fields ending in _raw are 18-decimal integers as strings. Di | $0.02 | Base |
| GET | api.onesource.io/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 | $0.02 | Base |
| GET | api.onesource.io/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 | $0.02 | Base |
| GET | api.onesource.io/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 | $0.02 | Base |
| GET | api.onesource.io/standard/v1/governance/changes The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Governance and parameter-change history, queued changes awaiting effect, feature sw | $0.02 | Base |
| GET | api.onesource.io/standard/v1/holders/concentration The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. How concentrated Charter and Branch ownership is across wallets, including a standa | $0.02 | Base |
| GET | api.onesource.io/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 c | $0.02 | Base |
| GET | api.onesource.io/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, n | $0.02 | Base |
| GET | api.onesource.io/standard/v1/policy/epochs The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Epoch history and boundaries. Fields ending in _raw are 18-decimal integers as stri | $0.02 | Base |
| GET | api.onesource.io/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 | $0.02 | Base |
| GET | api.onesource.io/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 reserv | $0.02 | Base |
| GET | api.onesource.io/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 | $0.02 | Base |
| GET | api.onesource.io/standard/v1/supply/history The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Supply ledger history. Fields ending in _raw are 18-decimal integers as strings. Di | $0.02 | Base |
| GET | api.onesource.io/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 project | $0.02 | Base |
| GET | api.onesource.io/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 | $0.02 | Base |
| GET | api.onesource.io/standard/v1/vaults/history The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Vault snapshot history. Fields ending in _raw are 18-decimal integers as strings. D | $0.02 | Base |
| GET | api.onesource.io/standard/v1/decisions/branch The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Everything relevant to deciding whether to buy a Branch or license right now, bundl | $0.05 | Base |
| GET | api.onesource.io/standard/v1/decisions/charter The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Everything relevant to deciding whether to buy into a new charter right now, bundle | $0.05 | Base |
| GET | api.onesource.io/standard/v1/decisions/exit The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Everything relevant to deciding whether to exit a charter's branches right now, bun | $0.05 | Base |
| GET | api.onesource.io/standard/v1/decisions/plan The Standard Reserve (TSR), an on-chain reserve protocol on Robinhood Chain. Simulates keep, selective, and aggressive Branch-expansion strategies over a horizo | $0.05 | Base |
Latest checks
| When | Endpoint | HTTP | ms | Result |
|---|---|---|---|---|
| 4 days ago | api.onesource.io/api/chain/allowance | 402 | 555 | valid x402 v2 terms |
Income on Base (7 days)
| Day | Transfers | USDC | |
|---|---|---|---|
| 2026-11-01 | 262 | $1.97 | |
| 2026-10-31 | 620 | $4.98 | |
| 2026-10-30 | 1044 | $8.40 | |
| 2026-10-29 | 444 | $4.15 | |
| 2026-10-28 | 34 | $0.27301 | |
| 2026-10-27 | 834 | $7.14 | |
| 2026-10-26 | 1099 | $8.69 | |
| 2026-10-25 | 825 | $6.59 |
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