Onchain Query API
ENS name resolution in both directions on Ethereum mainnet. Pass name to resolve an ENS name to its address (forward), or pass address to get that address's primary ENS name (reverse, forward-verified so spoofed reverse records are rejected). Read straight from the ENS registry. Use it to turn vitalik.eth into an address, or to label a raw address with a human-readable name.
- Category
- Crypto & DeFi
- Starting price
- $0.001
- Paid calls · 30 days
- 149
- Unique payers · 30 days
- 41
Paid endpoints
13 endpoints, sorted by usage. Prices are per request.
- GET/ens
ENS name resolution in both directions on Ethereum mainnet. Pass name to resolve an ENS name to its address (forward), or pass address to get that address's primary ENS name (reverse, forward-verified so spoofed reverse records are rejected). Read straight from the ENS registry. Use it to turn vitalik.eth into an address, or to label a raw address with a human-readable name.
$0.003Base36calls / 30d - GET/block
Latest block on any major EVM chain: block number, timestamp, age in seconds, base fee and gas used/limit. The cheapest possible liveness and chain-tip check for an agent: confirm a chain is progressing, timestamp an observation, or pick a block for a query.
$0.001Base34calls / 30d - GET/token
ERC-20 token profile on any major EVM chain: on-chain metadata (name, symbol, decimals, total supply) read straight from the contract, joined with live DEX market data (USD price, liquidity, 24h volume, 24h change, and the top trading pair with its DEX). Use it to price a token, check liquidity depth before a swap, or resolve an unknown contract address into a real token.
$0.004Base28calls / 30d - GET/derivatives
Crypto perpetual-futures snapshot for a symbol in ONE call (Binance USD-M, keyless): current funding rate and the next funding time, mark and index price, open interest (contracts and USD), 24h price change/high/low/volume, and the top-trader long/short account ratio. For funding arbitrage, leverage/positioning reads, and a derivatives view an onchain-only feed cannot give. Cached 30s.
$0.005Base25calls / 30d - GET/price
Live crypto price feed for agents: USD price, pool liquidity and 1h/24h change for ANY ERC-20 on Base or Ethereum, read straight from the DEX pool on chain (Uniswap v2/v3/v4, Aerodrome). Works for brand-new coins that price sites do not list yet. Pass token=0x... and chain=base|ethereum (no chain: Base, then Ethereum). Tickers like eth or btc also work. Cached 15 seconds. For many tokens use POST
$0.001Base6calls / 30d - GET/balance
Native coin balance (ETH or POL) of any address on Base, Ethereum, Arbitrum, Optimism or Polygon, with USD value. One RPC read, no key, no node. Use it to check that a wallet is funded before sending, or to watch a counterparty balance.
$0.001Base3calls / 30d - GET/erc20-balance
ERC-20 token balance of any wallet on Base, Ethereum, Arbitrum, Optimism or Polygon: USDC, USDT, DAI, WETH or any token contract. Returns the human balance, the raw integer amount, and the token's symbol and decimals read from the contract. Omit `token` to get the chain's native USDC. Use it to confirm a payment landed or to check a stablecoin float.
$0.001Base3calls / 30d - POST/price-batch
Batch on-chain price feed: up to 25 tokens on Base or Ethereum in ONE call for 0.01 USDC. Each row has USD price, pool liquidity, 1h and 24h change, read from the DEX pool on chain (Uniswap v2/v3/v4, Aerodrome). Value a wallet, refresh a watchlist or scan new launches. Rows that cannot be priced say why; you are charged only if at least one row prices.
$0.01Base3calls / 30d - GET/gas
Live gas market on any major EVM chain: current gas price, base fee and priority-fee percentiles (p25/p50/p75) in gwei, plus the estimated cost in native token and USD for a plain transfer (21k gas) and a typical DEX swap (200k gas). Lets an agent decide whether a transaction is worth sending right now or should wait for cheaper gas, and budget the fee before signing.
$0.002Base3calls / 30d - GET/gas-compare
Live gas across Base, Ethereum, Arbitrum, Optimism and Polygon in ONE call, sorted cheapest first: gas price, base fee, median priority fee and the estimated USD cost of a 21k-gas transfer and a 200k-gas swap on each chain. Lets an agent pick the cheapest chain to execute on, or size a fee, without five separate RPC calls. 10-second cache.
$0.002Base2calls / 30d - GET/prices
Spot USD prices for up to 20 crypto assets in ONE call: pass tickers (eth, btc, sol), CoinGecko ids, or 0x token addresses (priced from live DEX pairs). Each entry returns price_usd, 24h change and market cap where known; unknown symbols are reported, not silently dropped. Use it to value a portfolio, size a trade, or refresh a price table without 20 round trips.
$0.002Base2calls / 30d - GET/tx
Transaction lookup and decode on any major EVM chain. Turns a raw tx hash into agent-readable facts: success or failure status, block number, sender and recipient, native value transferred, gas used, fee in native token and USD, and every ERC-20 transfer decoded with token symbol, decimals and human-readable amount. Returns found=false for an unknown hash instead of erroring.
$0.003Base2calls / 30d - GET/wallet
Wallet snapshot on any major EVM chain: native token balance with USD value, USDC balance, transaction count (nonce), and whether the address is a smart contract or a regular EOA. One call, no RPC keys, node infrastructure or block-explorer scraping needed. Use it to check a counterparty wallet, confirm an address is funded before sending a transaction, or profile an unknown address.
$0.003Base2calls / 30d