gas-price-checker x402 REST usage
Read the live gas price, EIP-1559 base fee and estimated native-transfer cost on Base, Ethereum, Polygon, Arbitrum or Optimism. No RPC key or account. Try GET /gas-price/sample.
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Read the live gas price, EIP-1559 base fee and estimated native-transfer cost on Base, Ethereum, Polygon, Arbitrum or Optimism. No RPC key or account. Try GET /gas-price/sample.
Decode EVM calldata (transaction input) with the function signature you provide, checking that it matches the selector, or decode return data with its output types (e.g. uint256,address). Local calculation, no third-part...
Read contract event logs across a strictly bounded block range with an optional topic0 filter and capped response count.
Structured decode of any mainnet tx (base | ethereum | solana) — $0.001 USDC
Read the current block height directly from a supported Base, Ethereum, or Arbitrum public JSON-RPC provider.
The chain's pending block: how many transactions are queued for the next block, the base fee they will pay, and the gas already used against the limit. This is the node's own view of what is about to be mined, so it answ...
Profile of an EVM address on Base, Ethereum, OP Mainnet or Arbitrum in one call: EOA, contract or EIP-7702 account, age, transactions sent, native and major token balances (USDC, USDT, EURC, DAI, WETH, BTC), Sourcify-ver...
ETH/USD read straight from Ethereum state, no CEX or API key: the Chainlink ETH/USD feed (latestRoundData) plus the Uniswap v3 WETH/USDC 0.05% pool spot price in one RPC batch. Median of fresh sources, per-source price,...
SCV Honeypot Check: can this token be sold, or is it a trap? Trading gate, on-chain blacklist probe, taxes, mint/pause, proxy for $0.005 USDC via x402
SCV: проверка контракт(ов) на rug-pull паттерны ($0.005 за контракт)
Decode EVM calldata before signing: function signature candidates (openchain DB), decoded args, and plain-English warnings for approve/setApprovalForAll/permit/unlimited amounts.
Check a Base wallet's ERC-20 approvals: allowances for 8 major tokens (USDC, WETH, USDbC, DAI...) to common spenders (Permit2, Uniswap Universal Router, Uniswap SwapRouter02, Aerodrome Router...); flags unlimited approva...
Resolve an ENS name or Basename to an address (plus url/twitter/github text records), or reverse-resolve an address to its primary name.
Live gas snapshot for Base, Ethereum and BNB Smart Chain: gas price, base fee, block utilization, and estimated native cost of a transfer, ERC-20 transfer and swap.
Latest block number on Base, Ethereum, Arbitrum, Optimism, Polygon or BSC. $0.01 per call.
Current gas price, base fee and priority fee in gwei plus the cost of a plain transfer, for Base, Ethereum, Arbitrum, Optimism, Polygon or BSC. $0.01 per call.
Transaction count (nonce) of an address. Default chain Base; prefix another: ethereum:, arbitrum:, optimism:, polygon:, bsc:. $0.01 per call.
Raw transaction by hash: from, to, value, nonce, block, gas, type, method selector, pending flag. Default chain Base; prefix another: ethereum:, arbitrum:, optimism:, polygon:, bsc:. $0.01 per call.
Transaction receipt: success or failed, gas used, fee paid, logs, token-transfer events, created contract. Default chain Base; prefix another: ethereum:, arbitrum:, optimism:, polygon:, bsc:. $0.01 per call.
Block by number (or latest): time, hash, transaction count, gas used and limit, base fee, proposer. Default chain Base; prefix another: ethereum:, arbitrum:, optimism:, polygon:, bsc:. $0.01 per call.
The transaction count of an account, which is the nonce its next transaction must carry. Ask for block "pending" to include transactions already in the mempool, which is what you want before signing; the default "latest"...
Read one 32-byte storage slot from a contract, the raw state under whatever the source code calls it. Returns the word as hex plus three readings of the same bytes - unsigned integer, address (low 20 bytes) and boolean -...
The circulating total supply of an ERC-20, read from the token contract itself rather than from an aggregator, so it is the number the chain holds at the block you asked for. Returns the raw uint256 and the same figure f...
Resolve an ERC-20 contract address to its on-chain metadata: symbol, decimals, name, and logo URL where available. Use this to humanize a raw contract address before showing it to a user or before computing fiat values.