EVM Block by Height or Hash x402 REST usage
Retrieve a live EVM block header and a bounded list of real transaction hashes by height, tag, or block hash.
0.002 USDC per call
per call
Evm
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Encode packed x402 REST usage
Solidity abi.encodePacked equivalent — Genesis402 / UnyKorn Operator Network
0.003 USDC per call
per call
Read-Only EVM Contract Call x402 REST usage
Execute one bounded eth_call against Base, Ethereum, or Arbitrum and return raw deterministic call data without signing or broadcasting.
0.002 USDC per call
per call
Arbitrum One native balance x402 REST usage
Arbitrum One native balance. Native ETH balance (eth_getBalance) of any 0x wallet address on Arbitrum One at the latest block, in wei and in ETH. Use to check whether a wallet can pay gas or a transfer; for ERC-20 tokens...
0.003 USDC per call
per call
Arbitrum One gas price x402 REST usage
Arbitrum One gas price. Current gas price on Arbitrum One (eth_gasPrice): gas price, base fee and suggested priority fee in gwei, plus what a plain ETH transfer (21,000 gas) costs right now. Takes no input. Use before se...
0.003 USDC per call
per call
Arbitrum One recent event logs x402 REST usage
Arbitrum One recent event logs. Recent contract event logs on Arbitrum One (eth_getLogs): the events a contract emitted over the last N blocks (1-1,000, default 50), optionally filtered by topic0 (the 0x 32-byte event si...
0.003 USDC per call
per call
Arbitrum One account nonce x402 REST usage
Arbitrum One account nonce. Read the transaction count (nonce) of a 0x address on Arbitrum One, both confirmed and including pending transactions. Use to build the next transaction or to tell whether an address has ever...
0.003 USDC per call
per call
Arbitrum One transaction x402 REST usage
Arbitrum One transaction. Look up an Arbitrum One transaction by hash: sender, recipient, value in ETH, nonce, gas limit, the 4-byte function selector and its block. Use to see what was sent or whether it exists; for suc...
0.003 USDC per call
per call
Base recent event logs x402 REST usage
Base recent event logs. Recent contract event logs on Base (eth_getLogs): the events a contract emitted over the last N blocks (1-1,000, default 50), optionally filtered by topic0 (the 0x 32-byte event signature hash). R...
0.003 USDC per call
per call
Ethereum recent event logs x402 REST usage
Ethereum recent event logs. Recent contract event logs on Ethereum (eth_getLogs): the events a contract emitted over the last N blocks (1-1,000, default 50), optionally filtered by topic0 (the 0x 32-byte event signature...
0.003 USDC per call
per call
Ethereum account nonce x402 REST usage
Ethereum account nonce. Read the transaction count (nonce) of a 0x address on Ethereum, both confirmed and including pending transactions. Use to build the next transaction or to tell whether an address has ever sent any...
0.003 USDC per call
per call
Ethereum transaction x402 REST usage
Ethereum transaction. Look up an Ethereum transaction by hash: sender, recipient, value in ETH, nonce, gas limit, the 4-byte function selector and its block. Use to see what was sent or whether it exists; for success or...
0.003 USDC per call
per call
Optimism native balance x402 REST usage
Optimism native balance. Native ETH balance (eth_getBalance) of any 0x wallet address on Optimism at the latest block, in wei and in ETH. Use to check whether a wallet can pay gas or a transfer; for ERC-20 tokens use op_...
0.003 USDC per call
per call
Optimism gas price x402 REST usage
Optimism gas price. Current gas price on Optimism (eth_gasPrice): gas price, base fee and suggested priority fee in gwei, plus what a plain ETH transfer (21,000 gas) costs right now. Takes no input. Use before sending a...
0.003 USDC per call
per call
Optimism recent event logs x402 REST usage
Optimism recent event logs. Recent contract event logs on Optimism (eth_getLogs): the events a contract emitted over the last N blocks (1-1,000, default 50), optionally filtered by topic0 (the 0x 32-byte event signature...
0.003 USDC per call
per call
Optimism account nonce x402 REST usage
Optimism account nonce. Read the transaction count (nonce) of a 0x address on Optimism, both confirmed and including pending transactions. Use to build the next transaction or to tell whether an address has ever sent any...
0.003 USDC per call
per call
Optimism transaction x402 REST usage
Optimism transaction. Look up an Optimism transaction by hash: sender, recipient, value in ETH, nonce, gas limit, the 4-byte function selector and its block. Use to see what was sent or whether it exists; for success or...
0.003 USDC per call
per call
Polygon PoS native balance x402 REST usage
Polygon PoS native balance. Native POL balance (eth_getBalance) of any 0x wallet address on Polygon PoS at the latest block, in wei and in POL. Use to check whether a wallet can pay gas or a transfer; for ERC-20 tokens u...
0.003 USDC per call
per call
Polygon PoS gas price x402 REST usage
Polygon PoS gas price. Current gas price on Polygon PoS (eth_gasPrice): gas price, base fee and suggested priority fee in gwei, plus what a plain POL transfer (21,000 gas) costs right now. Takes no input. Use before send...
0.003 USDC per call
per call
Polygon PoS recent event logs x402 REST usage
Polygon PoS recent event logs. Recent contract event logs on Polygon PoS (eth_getLogs): the events a contract emitted over the last N blocks (1-1,000, default 50), optionally filtered by topic0 (the 0x 32-byte event sign...
0.003 USDC per call
per call
Polygon PoS account nonce x402 REST usage
Polygon PoS account nonce. Read the transaction count (nonce) of a 0x address on Polygon PoS, both confirmed and including pending transactions. Use to build the next transaction or to tell whether an address has ever se...
0.003 USDC per call
per call
Polygon PoS transaction x402 REST checked
Polygon PoS transaction. Look up a Polygon PoS transaction by hash: sender, recipient, value in POL, nonce, gas limit, the 4-byte function selector and its block. Use to see what was sent or whether it exists; for succes...
0.003 USDC per call
per call
checked
Predict contract address x402 REST usage
Compute a contract address in advance: CREATE (deployer + nonce) or CREATE2 (deployer + salt + init code hash). For deterministic deployments and verifying announced addresses.
0.003 USDC per call
per call
Crypto address validator x402 REST usage
Detect and validate a crypto address before sending funds: EVM (EIP-55 checksum), Solana, Bitcoin (legacy, P2SH, SegWit, Taproot), Litecoin, Dogecoin, Tron and Cosmos bech32, with its type and network. Computed locally.
0.003 USDC per call
per call