# Services from api.arysphere.com on Zero

> api.arysphere.com serves 33 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/api.arysphere.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/api.arysphere.com/health.json

## Services

- [Base eth_getLogs – Contract Event Log Reader](https://www.zero.xyz/c/base-eth-getlogs-contract-event-log-reader-d0176918/llms.txt): $0.003/call via x402. Fetches filtered on-chain event logs from a Base smart contract by address, optional event signature topic, and optional block range.
- [Ethereum eth_getTransactionByHash](https://www.zero.xyz/c/ethereum-eth-gettransactionbyhash-91c89f8f/llms.txt): $0.003/call via x402. Fetches a full Ethereum mainnet transaction by its hash directly from the node, returning all transaction fields or null if not found.
- [Ethereum Mainnet Get Block By Number](https://www.zero.xyz/c/ethereum-mainnet-get-block-by-number-35b35041/llms.txt): $0.003/call via x402. Fetches the full Ethereum mainnet block header for a given block number or the latest block.
- [ETH Mainnet Contract ABI](https://www.zero.xyz/c/eth-mainnet-contract-abi-1eb03995/llms.txt): $0.003/call via x402. Fetches the ABI (Application Binary Interface) of an Ethereum mainnet smart contract by its address, including proxy detection and implementation details.
- [ARYSPHERE eth_getBlockByNumber – Ethereum Block Lookup](https://www.zero.xyz/c/arysphere-eth-getblockbynumber-ethereum-block-lookup-6dd260f0/llms.txt): $0.003/call via x402. Fetches a full Ethereum mainnet block by number (or 'latest'), returning all block header fields and metadata, paid per call via x402 USDC on Base.
- [ARYSPHERE Ethereum Mainnet Logs & Transaction Reader](https://www.zero.xyz/c/arysphere-ethereum-mainnet-logs-transaction-reader-08fbbbfd/llms.txt): $0.005/call via x402. Fetches Ethereum mainnet event logs filtered by contract address/topic and retrieves transaction details by hash, paid per call in USDC via x402.
- [Base eth_getTransactionByHash](https://www.zero.xyz/c/base-eth-gettransactionbyhash-3db03b5c/llms.txt): $0.003/call via x402. Fetches a Base network transaction by its hash, returning full on-chain transaction details as returned by the node.
- [Base ETH Balance Lookup (eth_getBalance)](https://www.zero.xyz/c/base-eth-balance-lookup-eth-getbalance-3fae61ce/llms.txt): $0.002/call via x402. Returns the native ETH balance of a Base network address by calling eth_getBalance on-chain.
- [Base eth_getBlockByNumber](https://www.zero.xyz/c/base-eth-getblockbynumber-0664b019/llms.txt): $0.003/call via x402. Fetches a Base blockchain block by block number or 'latest' using eth_getBlockByNumber
- [Base Contract ABI](https://www.zero.xyz/c/base-contract-abi-e6d4712d/llms.txt): $0.002/call via x402. Returns the ABI of a smart contract on the Base network given its contract address, including proxy detection and implementation resolution.
- [Base ERC-20 Balance](https://www.zero.xyz/c/base-erc-20-balance-8b70cda5/llms.txt): $0.003/call via x402. Returns the ERC-20 token balance (balanceOf) for a specific holder address on the Base blockchain
- [Base ERC-721 Owner Lookup](https://www.zero.xyz/c/base-erc-721-owner-lookup-ee5fadb5/llms.txt): $0.003/call via x402. Returns the current owner address of a specific NFT token ID on the Base blockchain by calling ownerOf() on the ERC-721 contract.
- [Base Token Verdict](https://www.zero.xyz/c/base-token-verdict-fd88a17a/llms.txt): $0.01/call via x402. Returns an AI-written verdict (grade, one-liner, roast) on a Base ERC-20 token contract address, based on on-chain contract facts only.
- [Ethereum Mainnet ETH Balance (eth_getBalance)](https://www.zero.xyz/c/ethereum-mainnet-eth-balance-eth-getbalance-9d216e96/llms.txt): $0.003/call via x402. Returns the native ETH balance in wei for a given Ethereum mainnet address using eth_getBalance.
- [Ethereum Mainnet Transaction Receipt Lookup](https://www.zero.xyz/c/ethereum-mainnet-transaction-receipt-lookup-92d6b397/llms.txt): $0.002/call via x402. Fetches a transaction receipt (status, gas used, logs) from Ethereum mainnet by transaction hash via eth_getTransactionReceipt.
- [Ethereum Mainnet Gas Price](https://www.zero.xyz/c/ethereum-mainnet-gas-price-f1bd9d0b/llms.txt): $0.003/call via x402. Returns the current Ethereum mainnet gas price in wei with no input parameters required.
- [Ethereum Mainnet eth_getCode – Contract Bytecode Lookup](https://www.zero.xyz/c/ethereum-mainnet-eth-getcode-contract-bytecode-lookup-40bec3d5/llms.txt): $0.003/call via x402. Returns the deployed bytecode at a given Ethereum mainnet contract address using eth_getCode.
- [ARYSPHERE eth_chainId Read](https://www.zero.xyz/c/arysphere-eth-chainid-read-083a52b5/llms.txt): $0.002/call via x402. Returns the chain ID of the Ethereum mainnet via a pay-per-call x402 API endpoint requiring no account or API key.
- [Ethereum Mainnet eth_getLogs (Event Logs Reader)](https://www.zero.xyz/c/ethereum-mainnet-eth-getlogs-event-logs-reader-17d71765/llms.txt): $0.003/call via x402. Fetches raw event logs from an Ethereum mainnet smart contract, filtered by event topic and block range.
- [Ethereum Mainnet Get Transaction By Hash](https://www.zero.xyz/c/ethereum-mainnet-get-transaction-by-hash-dbcb6007/llms.txt): $0.003/call via x402. Fetches full Ethereum mainnet transaction details for a given transaction hash via eth_getTransactionByHash
- [Ethereum Mainnet Block by Number (eth_getBlockByNumber)](https://www.zero.xyz/c/ethereum-mainnet-block-by-number-eth-getblockbynumber-a8bc0f45/llms.txt): $0.003/call via x402. Fetches a specific Ethereum mainnet block by block number or 'latest' via eth_getBlockByNumber
- [Ethereum ERC-20 Allowance Lookup](https://www.zero.xyz/c/ethereum-erc-20-allowance-lookup-71ddcb87/llms.txt): $0.002/call via x402. Returns the raw ERC-20 token allowance a holder (owner) has granted to a spender on Ethereum mainnet.
- [Ethereum ERC-20 Balance (balanceOf)](https://www.zero.xyz/c/ethereum-erc-20-balance-balanceof-32307ed8/llms.txt): $0.002/call via x402. Returns the raw ERC-20 token balance of a holder address on Ethereum mainnet by calling the contract's balanceOf function.
- [Ethereum ERC-20 Total Supply](https://www.zero.xyz/c/ethereum-erc-20-total-supply-574722f7/llms.txt): $0.003/call via x402. Returns the total supply (uint256) of a given ERC-20 token contract on Ethereum mainnet via the totalSupply() call.
- [Ethereum ERC-721 Owner Lookup](https://www.zero.xyz/c/ethereum-erc-721-owner-lookup-1e9c3181/llms.txt): $0.003/call via x402. Returns the current owner address of a specific ERC-721 NFT token on Ethereum mainnet given a contract address and token ID.
- [Gnosis Chain Native xDAI Balance Lookup](https://www.zero.xyz/c/gnosis-chain-native-xdai-balance-lookup-32411428/llms.txt): $0.003/call via x402. Returns the native xDAI balance (in wei, as a hex string) of a single Ethereum-style address on Gnosis Chain at the latest block.
- [Gnosis Chain Event Logs (eth_getLogs)](https://www.zero.xyz/c/gnosis-chain-event-logs-eth-getlogs-9fd81436/llms.txt): $0.003/call via x402. Fetches raw event logs from a Gnosis Chain smart contract address, filtered by topic and block range, using eth_getLogs.
- [Network Info Balance Bundle](https://www.zero.xyz/c/network-info-balance-bundle-6e8075d5/llms.txt): $0.005/call via x402. Fetches Base chain network summary and native ETH balance for an address in a single paid call
- [Base Reads Bundle](https://www.zero.xyz/c/base-reads-bundle-daf117ac/llms.txt): $0.008/call via x402. Returns ETH balance for a Base address and Ethereum mainnet network info (chain ID, block number, gas price) in a single paid API call.
- [Base Network Info Summary](https://www.zero.xyz/c/base-network-info-summary-926ef6e1/llms.txt): $0.002/call via x402. Returns a comprehensive snapshot of the Base blockchain network state including chain ID, block number, gas price, gas limits, and block metadata in a single call.
- [Ethereum Mainnet eth_blockNumber](https://www.zero.xyz/c/ethereum-mainnet-eth-blocknumber-c4f00109/llms.txt): $0.003/call via x402. Returns the latest Ethereum mainnet block number via the eth_blockNumber JSON-RPC call, requiring no input parameters.
- [Ethereum Mainnet eth_getTransactionCount (Nonce Lookup)](https://www.zero.xyz/c/ethereum-mainnet-eth-gettransactioncount-nonce-lookup-71e6d46d/llms.txt): $0.003/call via x402. Returns the number of transactions sent from an Ethereum mainnet address (its nonce / transaction count) via eth_getTransactionCount.
- [Gnosis Network Info](https://www.zero.xyz/c/gnosis-network-info-e13c3d2a/llms.txt): $0.002/call via x402. Returns a comprehensive snapshot of Gnosis Chain network state including chain ID, block number, gas price, block gas limit, and block timestamp in a single call.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)