Evm fee history x402 REST usage
Recent base-fee and priority-fee history — Genesis402 / UnyKorn Operator Network
0.004 USDC per call
per call
Evm
403 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
ERC-20 Allowance x402 REST usage
How much a spender (router, Permit2, protocol) is approved to move from an owner's ERC-20 balance, with an unlimited-approval flag. Use to check approvals before a swap or to audit risky approvals.
0.002 USDC per call
per call
EVM Block x402 REST usage
An EVM block by number or tag (latest, finalized, safe): hash, parent, time, miner, gas used and limit, base fee, size and its transaction hashes.
0.002 USDC per call
per call
Gas Estimate x402 REST usage
Estimate the gas a transaction will use (eth_estimateGas) and its cost at the current gas price, with a 20% buffer; fails clearly when the call would revert. Use before signing.
0.002 USDC per call
per call
EVM Network Info x402 REST usage
Live state of an EVM network: chain ID, latest block number and age, gas price, base and priority fee, block gas use and tx count. Use as a health check before sending transactions.
0.002 USDC per call
per call
NFT Owner x402 REST usage
Current owner of an ERC-721 NFT by contract and token ID. Use to verify ownership for token gating, sales or airdrops.
0.002 USDC per call
per call
Account Nonce x402 REST usage
Next transaction nonce of an EVM address (confirmed and pending), pending tx count, native balance, contract flag and EIP-7702 delegate. Use before signing or to detect stuck transactions.
0.002 USDC per call
per call
Proxy Detector x402 REST usage
Detect upgradeable proxies: EIP-1967 transparent/UUPS, beacon, EIP-1822, ZeppelinOS, EIP-1167 clones and Safe-style proxies, returning implementation, admin and beacon addresses. Use for audits and to fetch the real ABI.
0.002 USDC per call
per call
Transaction Receipt x402 REST usage
Receipt of a mined EVM transaction: success or revert, gas used, effective gas price, fee (and L2 L1 fee), created contract and event logs with Transfer and Approval decoded. Use to confirm a payment or swap.
0.002 USDC per call
per call
Token Total Supply x402 REST usage
Total supply, name, symbol and decimals of an ERC-20 or ERC-721 contract, read on-chain. Use for market-cap math, supply checks and token due diligence.
0.002 USDC per call
per call
Forest Web x402 REST usage
Convert one bounded fiat amount using the latest successfully fetched European Central Bank daily foreign-exchange reference table. Forest returns the ECB observation date and deterministic cross-rates through EUR. Fresh...
0.001 USDC per call
per call
P0 Agent Economy Index x402 REST usage
Use when an agent needs x402 market totals. Returns market size: sellers listed by source and evidence (how many P0 has read itself), plus 30-day market totals from x402stats (CC BY 4.0), with attribution and a receipt
0.001 USDC per call
per call
Multichain RPC/gas x402 REST usage
Live gas prices: EIP-1559 base fee plus low/medium/high priority tiers in gwei, and the estimated cost of a simple transfer.
0.001 USDC per call
per call
x402-balance x402 REST usage
Native ETH balance for any wallet on Base, machine-readable, one call. $0.003 USDC per call on Base.
0.003 USDC per call
per call
Decode x402 REST usage
Decode an EVM transaction and its event logs with a caller-supplied ABI. Base, Polygon, Arbitrum, Optimism or Avalanche. $0.003 per completed decode; unknown selectors retain raw data.
0.003 USDC per call
per call
Evm call x402 REST usage
Simulate any read-only contract call — Genesis402 / UnyKorn Operator Network
0.003 USDC per call
per call
Evm estimate gas x402 REST usage
Estimate the gas a transaction would use, before signing it — Genesis402 / UnyKorn Operator Network
0.003 USDC per call
per call
Evm receipt x402 REST usage
Transaction receipt — did it succeed, what did it cost, what did it emit — Genesis402 / UnyKorn Operator Network
0.003 USDC per call
per call
Abi decode x402 REST usage
ABI-decode return data against declared types — Genesis402 / UnyKorn Operator Network
0.003 USDC per call
per call
Abi encode x402 REST usage
ABI-encode a list of typed parameters — Genesis402 / UnyKorn Operator Network
0.003 USDC per call
per call
Eth contract address x402 REST usage
Predict a contract address before it is deployed — Genesis402 / UnyKorn Operator Network
0.003 USDC per call
per call
Eth rlp encode x402 REST usage
RLP-encode a value or nested list — Genesis402 / UnyKorn Operator Network
0.003 USDC per call
per call
Calldata split x402 REST usage
Split calldata into its selector and 32-byte words — Genesis402 / UnyKorn Operator Network
0.003 USDC per call
per call
Evm gas price x402 REST usage
Current gas price on any of ten EVM chains — Genesis402 / UnyKorn Operator Network
0.003 USDC per call
per call