P0: wallet balances and EVM reads

Use when you need a wallet's token balances on several chains in one call: native coin plus USDC, USDT, DAI, WETH, WBTC/cbBTC on Ethereum, Base, Arbitrum and Polygon. Returns the paid x402 request for your input (GET /wallet/balance, $0.003 per call; schema linked). Call that URL with an x402 or MPP client to get the data. Bad input is refused before any charge. For one token on one chain use evm_erc20_balance; for the native coin on one chain use evm_native_balance; for many wallets use wallet_balance_batch. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price. First call each day returns the data itself, free; later calls return the paid request.

Use when you need native and stablecoin balances for a list of wallets: up to 25 addresses (0x or ENS names) in one POST. Returns the paid x402 request for your input (POST /wallet/balance/batch, $0.075 per call; schema linked). POST that JSON body to the URL with an x402 or MPP client to get the data. Bad input is refused before any charge. For one wallet use wallet_balance. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price.

Use when you must confirm that a transaction paid at least an amount of an asset to an address: pass tx, to, amount and asset. Returns the paid x402 request for your input (GET /pay/check, $0.003 per call; schema linked). Call that URL with an x402 or MPP client to get the data. Bad input is refused before any charge. Checks a payment against an expected recipient and amount; for raw transaction fields use evm_transaction, for status and logs use evm_receipt. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price. First call each day returns the data itself, free; later calls return the paid request.

Use for a DEX swap quote with a ready unsigned transaction: best route from Velora (ParaSwap), KyberSwap as fallback, on Base, Arbitrum, Ethereum, Optimism, Polygon, BNB Chain. Returns the paid x402 request for your input (GET /quote/swap, $0.002 per call; schema linked). Call that URL with an x402 or MPP client to get the data. Bad input is refused before any charge. Quote only: nothing is signed or sent, and the reply discloses P0's integrator fee. To check balances first use wallet_balance. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price. First call each day returns the data itself, free; later calls return the paid request.

Use when you need one ERC-20 balance for one wallet: balanceOf, decimals and symbol read in a single multicall on Base, Ethereum, Arbitrum, Polygon or Optimism, with raw units, a decimal amount. Returns the paid x402 request for your input (GET /evm/erc20-balance, $0.002 per call; schema linked). Call that URL with an x402 or MPP client to get the data. Bad input is refused before any charge. One token on one chain; for several tokens or chains at once use wallet_balance. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price. First call each day returns the data itself, free; later calls return the paid request.

Use when you need the native coin balance (ETH or POL) of an address on Base, Ethereum, Arbitrum, Polygon or Optimism: wei and a decimal amount from a public node, with the block number and as_of. Returns the paid x402 request for your input (GET /evm/native-balance, $0.001 per call; schema linked). Call that URL with an x402 or MPP client to get the data. Bad input is refused before any charge. Native coin on one chain only; for stablecoins or several chains use wallet_balance. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price. First call each day returns the data itself, free; later calls return the paid request.

Use when you need a block header on Base, Ethereum, Arbitrum, Polygon or Optimism: latest or a given number, with hash, parent, timestamp, miner, gas used/limit. Returns the paid x402 request for your input (GET /evm/block, $0.001 per call; schema linked). Call that URL with an x402 or MPP client to get the data. Bad input is refused before any charge. Block header only; for one transaction use evm_transaction or evm_receipt. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price. First call each day returns the data itself, free; later calls return the paid request.

Use when you need a transaction by hash on Base, Ethereum, Arbitrum, Polygon or Optimism: from, to, value, nonce, gas and fee fields, block, confirmations, method id and input (first 1 KB). Returns the paid x402 request for your input (GET /evm/tx, $0.002 per call; schema linked). Call that URL with an x402 or MPP client to get the data. Bad input is refused before any charge. Raw transaction fields (from, to, value, input); to know whether it succeeded (status, gas used, logs) use evm_receipt; to check a payment amount use pay_check. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price. First call each day returns the data itself, free; later calls return the paid request.

Use when you need to know whether a transaction succeeded on Base, Ethereum, Arbitrum, Polygon or Optimism: receipt status, block, confirmations, gas used, effective gas price. Returns the paid x402 request for your input (GET /evm/receipt, $0.002 per call; schema linked). Call that URL with an x402 or MPP client to get the data. Bad input is refused before any charge. Status and logs of a mined transaction; for the transaction fields (from, to, value, input) use evm_transaction; to check a payment amount use pay_check. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price. First call each day returns the data itself, free; later calls return the paid request.

Use when you must know whether an address is a contract on Base, Ethereum, Arbitrum, Polygon or Optimism: is_contract, bytecode size, sha256 of the bytecode. Returns the paid x402 request for your input (GET /evm/code, $0.002 per call; schema linked). Call that URL with an x402 or MPP client to get the data. Bad input is refused before any charge. Contract check with bytecode size and hash only; for the coin balance use evm_native_balance, for the transaction count use evm_nonce. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price. First call each day returns the data itself, free; later calls return the paid request.

Use when you need ENS on Ethereum: name to address (name=vitalik.eth, via the Universal Resolver, with resolver address) or address to primary name (address=0x..., reverse record, forward-verified). Returns the paid x402 request for your input (GET /evm/ens, $0.002 per call; schema linked). Call that URL with an x402 or MPP client to get the data. Bad input is refused before any charge. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price. First call each day returns the data itself, free; later calls return the paid request.

Use when you need an account's transaction count on Base, Ethereum, Arbitrum, Polygon or Optimism: nonce at the latest block and the pending nonce (queued transactions in the node's pool). Returns the paid x402 request for your input (GET /evm/nonce, $0.001 per call; schema linked). Call that URL with an x402 or MPP client to get the data. Bad input is refused before any charge. Transaction count (latest and pending) only; for the coin balance use evm_native_balance, for a transaction by hash use evm_transaction or evm_receipt. With an access key (Authorization: Bearer p0k_..., buy at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/keys/buy?usd=5) the tool pays the call itself, returns the data and deducts the price. First call each day returns the data itself, free; later calls return the paid request.