# Services from multichain-rpc.clankerceo.workers.dev on Zero > multichain-rpc.clankerceo.workers.dev serves 19 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/multichain-rpc.clankerceo.workers.dev Live health (JSON, refreshed every minute): https://www.zero.xyz/host/multichain-rpc.clankerceo.workers.dev/health.json ## Services - [Multichain RPC NFT Metadata Lookup](https://www.zero.xyz/c/multichain-rpc-nft-metadata-lookup-3a9126e6/llms.txt): $0.004/call via x402. Fetches parsed NFT metadata (name, image, attributes, etc.) for a given ERC-721 or ERC-1155 token on Base, Polygon, Arbitrum, Optimism, or Ethereum by resolving tokenURI through IPFS, Arweave, data: URIs, and HTTPS. - [Multichain RPC NFT Metadata](https://www.zero.xyz/c/multichain-rpc-nft-metadata-af4b99f2/llms.txt): $0.004/call via x402. Fetches parsed NFT metadata for ERC-721 and ERC-1155 tokens on Base, Polygon, Arbitrum, Optimism, and Ethereum by resolving tokenURI across IPFS, Arweave, data URIs, and HTTPS - [Multichain RPC – Proxy Pattern Detector](https://www.zero.xyz/c/multichain-rpc-proxy-pattern-detector-0c9d919e/llms.txt): $0.002/call via x402. Detects upgradeable proxy patterns (EIP-1967, UUPS, Transparent, Beacon) for a given contract address and returns the current implementation address. - [Multichain RPC/token](https://www.zero.xyz/c/multichain-rpc-token-8a2533f4/llms.txt): $0.002/call via x402. Returns ERC-20 token metadata (name, symbol, decimals, total supply) for any token contract on Base, Polygon, Arbitrum, Optimism, or Ethereum. - [Multichain RPC - Wallet Balance](https://www.zero.xyz/c/multichain-rpc-wallet-balance-623d30db/llms.txt): $0.002/call via x402. Returns native coin and ERC-20 token balances for any wallet address on Base, Polygon, Arbitrum, Optimism, or Ethereum, in both raw and human-readable decimal formats. - [Multichain RPC/tx — Transaction Lookup](https://www.zero.xyz/c/multichain-rpc-tx-transaction-lookup-f6c6c1b6/llms.txt): $0.002/call via x402. Retrieves full transaction details and receipt by hash on EVM chains, including status, block, from/to addresses, value, gas used, effective gas price, and decoded ERC-20 transfers. - [Multichain RPC Balance](https://www.zero.xyz/c/multichain-rpc-balance-29b4b98f/llms.txt): $0.002/call via x402. Returns native coin and ERC-20 token balances for a wallet address on Base, Polygon, Arbitrum, Optimism, or Ethereum, with both raw (wei) and human-readable decimal amounts. - [Multichain RPC Proxy Implementation Lookup](https://www.zero.xyz/c/multichain-rpc-proxy-implementation-lookup-fdf0431a/llms.txt): $0.002/call via x402. Detects whether a smart contract on EVM chains is a proxy and resolves the underlying implementation address using EIP-1967 and similar patterns. - [Multichain RPC – ERC-721 NFT Metadata Lookup](https://www.zero.xyz/c/multichain-rpc-erc-721-nft-metadata-lookup-7d803545/llms.txt): $0.004/call via x402. Fetches on-chain ERC-721 NFT metadata (name, token URI, standard) for a given contract address and token ID on EVM chains including Base, Polygon, Arbitrum, Optimism, and Ethereum. - [Multichain RPC Token Metadata](https://www.zero.xyz/c/multichain-rpc-token-metadata-2713e857/llms.txt): $0.002/call via x402. Fetches ERC-20 token metadata (name, symbol, decimals, total supply) for any token contract on Base, Polygon, Arbitrum, Optimism, or Ethereum. - [Multichain RPC Gas Price](https://www.zero.xyz/c/multichain-rpc-gas-price-0021337d/llms.txt): $0.001/call via x402. Returns live EIP-1559 gas prices (base fee, low/medium/high priority tiers in gwei) and estimated simple transfer cost for a specified EVM chain. - [Multichain RPC Gas Price Lookup](https://www.zero.xyz/c/multichain-rpc-gas-price-lookup-e7481779/llms.txt): $0.001/call via x402. Returns live EIP-1559 gas prices (base fee, low/medium/high priority tiers in gwei) and estimated simple transfer cost for a specified EVM chain. - [Multichain RPC Transaction Receipt Lookup](https://www.zero.xyz/c/multichain-rpc-transaction-receipt-lookup-69943f6b/llms.txt): $0.002/call via x402. Fetches the on-chain transaction receipt for a given transaction hash on EVM-compatible chains (Base, Polygon, Arbitrum, Optimism, Ethereum) - [Multichain RPC Token Balance Lookup](https://www.zero.xyz/c/multichain-rpc-token-balance-lookup-fe7502ed/llms.txt): $0.002/call via x402. Returns the ERC-20 token balance (and native coin balance) for a wallet address on a specified EVM chain - [Multichain RPC – ERC-20 Token Balance Lookup](https://www.zero.xyz/c/multichain-rpc-erc-20-token-balance-lookup-b7695e7d/llms.txt): $0.002/call via x402. Returns the ERC-20 token balance for a given wallet address on Base, Polygon, Arbitrum, Optimism, or Ethereum. - [Multichain RPC – Transaction Receipt Lookup](https://www.zero.xyz/c/multichain-rpc-transaction-receipt-lookup-055806a0/llms.txt): $0.002/call via x402. Fetches the on-chain transaction receipt (status, gas used, and metadata) for a given transaction hash on Base, Polygon, Arbitrum, Optimism, or Ethereum. - [Multichain RPC – ERC-20 Token Metadata Lookup](https://www.zero.xyz/c/multichain-rpc-erc-20-token-metadata-lookup-0e0cade7/llms.txt): $0.002/call via x402. Returns ERC-20 token metadata (name, symbol, decimals, total supply) for a given contract address on Base, Polygon, Arbitrum, Optimism, or Ethereum. - [Multichain RPC Gas Estimate](https://www.zero.xyz/c/multichain-rpc-gas-estimate-0d94771a/llms.txt): $0.001/call via x402. Returns a gas cost estimate for a simple ETH transfer on a specified EVM chain, including base fee, gas price, and transfer cost in gwei. - [Multichain RPC Contract Proxy](https://www.zero.xyz/c/multichain-rpc-contract-proxy-cbb50e48/llms.txt): $0.002/call via x402. Detects whether a smart contract is a proxy and resolves its implementation address across EVM chains including Base, Polygon, Arbitrum, Optimism, and Ethereum. 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)