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api.onesource.io

25 resources

Resource Activity

via Bazaar · last 30 days
Total calls
3,797
Unique payers
3,639
Est. volume (30d)
$16.36
~$0.55/day
Last called
Jun 21, 2026

Top resources by calls

ResourceCallsUnique payers
api.onesource.ioENS resolve - turn a .eth name into an address, or an addres…197164
api.onesource.ioFull Ethereum transaction details by hash via eth_getTransac…195183
api.onesource.ioContract introspection via eth_call - name, symbol, decimals…185170
api.onesource.ioLatest Ethereum block height - current chain tip via eth_blo…182173
api.onesource.ioEthereum network info - chain ID, block height, and gas pric…168163
api.onesource.ioTransaction receipt via eth_getTransactionReceipt - status, …164154
api.onesource.ioEstimate the gas a transaction will consume via eth_estimate…157156
api.onesource.ioRead a raw storage slot from any Ethereum contract via eth_g…154151
api.onesource.ioNext transaction nonce for any Ethereum wallet via eth_getTr…153148
api.onesource.ioFetch an Ethereum block header and transaction hashes by num…152143

All Resources

api.onesource.io
https://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
$0.003000 USDC
api.onesource.io
https://api.onesource.io/api/chain/block-number
Latest Ethereum block height - current chain tip via eth_blockNumber
$0.001000 USDC
api.onesource.io
https://api.onesource.io/api/chain/block/:number
Fetch an Ethereum block header and transaction hashes by number, tag, or hex via eth_getBlockByNumber
$0.003000 USDC
api.onesource.io
https://api.onesource.io/api/chain/call
Simulate a read-only Ethereum contract call via eth_call - no transaction sent
$0.005000 USDC
api.onesource.io
https://api.onesource.io/api/chain/chain-id
Ethereum chain ID (EIP-155) via eth_chainId - confirm which chain a network is on
$0.001000 USDC
api.onesource.io
https://api.onesource.io/api/chain/code/:address
Check if an Ethereum address is a contract via eth_getCode - returns deployed bytecode
$0.003000 USDC
api.onesource.io
https://api.onesource.io/api/chain/contract/:address
Contract introspection via eth_call - name, symbol, decimals, and ERC20/721/1155 interface support
$0.005000 USDC
api.onesource.io
https://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
$0.005000 USDC
api.onesource.io
https://api.onesource.io/api/chain/erc1155-balance
ERC1155 token balance via balanceOf (eth_call) - how many copies of a token_id a wallet holds
$0.003000 USDC
api.onesource.io
https://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
$0.003000 USDC
api.onesource.io
https://api.onesource.io/api/chain/erc20-transfers
ERC20 Transfer logs via eth_getLogs - decoded sender, recipient, and amount for a token or wallet
$0.005000 USDC
api.onesource.io
https://api.onesource.io/api/chain/erc721-tokens
List every ERC721 NFT token_id a wallet owns in a collection via tokenOfOwnerByIndex (eth_call)
$0.008000 USDC
api.onesource.io
https://api.onesource.io/api/chain/estimate-gas
Estimate the gas a transaction will consume via eth_estimateGas before signing it
$0.004000 USDC
api.onesource.io
https://api.onesource.io/api/chain/events
Query Ethereum contract event logs via eth_getLogs - filter by contract, topic, and block range
$0.005000 USDC
api.onesource.io
https://api.onesource.io/api/chain/live-balance
Live wallet balance - native ETH plus any ERC20 tokens in one call via eth_getBalance and balanceOf on OneSource Ethereum RPC
$0.003000 USDC
api.onesource.io
https://api.onesource.io/api/chain/network-info
Ethereum network info - chain ID, block height, and gas price in one batched RPC call (eth_chainId + eth_blockNumber + eth_gasPrice)
$0.001000 USDC
api.onesource.io
https://api.onesource.io/api/chain/nft-metadata
NFT metadata, traits, and image URI for any ERC721 or ERC1155 token - fetched via eth_call with IPFS resolution (OneSource live Ethereum RPC)
$0.008000 USDC
api.onesource.io
https://api.onesource.io/api/chain/nft-owner
Look up the current owner of an ERC721 NFT by token_id via ownerOf (eth_call)
$0.003000 USDC
api.onesource.io
https://api.onesource.io/api/chain/nonce/:address
Next transaction nonce for any Ethereum wallet via eth_getTransactionCount - how many txs it has sent
$0.003000 USDC
api.onesource.io
https://api.onesource.io/api/chain/pending
Pending Ethereum block - mempool transactions not yet mined, via eth_getBlockByNumber("pending")
$0.01 USDC
api.onesource.io
https://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
$0.005000 USDC
api.onesource.io
https://api.onesource.io/api/chain/receipt/:hash
Transaction receipt via eth_getTransactionReceipt - status, gas, and event logs for a mined Ethereum transaction
$0.005000 USDC
api.onesource.io
https://api.onesource.io/api/chain/storage
Read a raw storage slot from any Ethereum contract via eth_getStorageAt
$0.005000 USDC
api.onesource.io
https://api.onesource.io/api/chain/total-supply
Total supply of an ERC20 or ERC721 token contract via totalSupply (eth_call)
$0.003000 USDC
api.onesource.io
https://api.onesource.io/api/chain/tx/:hash
Full Ethereum transaction details by hash via eth_getTransactionByHash - from, to, value, calldata, block
$0.008000 USDC