# Services from propeller.rocks on Zero

> propeller.rocks serves 9 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/propeller.rocks
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/propeller.rocks/health.json

## Services

- [propeller.rocks ERC-20 Token Metadata Lookup](https://www.zero.xyz/c/propeller-rocks-erc-20-token-metadata-lookup-803cfeb3/llms.txt): $0.01/call via x402. Fetches on-chain metadata (name, symbol, decimals, totalSupply) for any ERC-20 token by contract address
- [propeller.rocks Price Feed](https://www.zero.xyz/c/propeller-rocks-price-feed-09de2620/llms.txt): $0.01/call via x402. Returns the current USD price of ETH, BTC, USDC, or any Chainlink price feed on Base
- [propeller.rocks EVM Calldata Encoder](https://www.zero.xyz/c/propeller-rocks-evm-calldata-encoder-c65ad2f7/llms.txt): $0.001/call via x402. Encodes a function call (given a signature or ABI plus arguments) into EVM-compatible calldata bytes
- [propeller.rocks EVM Event Log Decoder](https://www.zero.xyz/c/propeller-rocks-evm-event-log-decoder-94727740/llms.txt): $0.001/call via x402. Decodes a raw EVM event log into its human-readable event name and named arguments using the event ABI or signature
- [propeller.rocks EVM Calldata Decoder](https://www.zero.xyz/c/propeller-rocks-evm-calldata-decoder-58e095cd/llms.txt): $0.001/call via x402. Decodes raw EVM transaction calldata into a human-readable function name and named arguments
- [propeller.rocks Function Selector / Event Topic0 Computer](https://www.zero.xyz/c/propeller-rocks-function-selector-event-topic0-computer-29c14d5e/llms.txt): $0.001/call via x402. Computes the 4-byte function selector or 32-byte event topic0 hash from an ABI function or event signature
- [propeller.rocks Keccak256 Hash](https://www.zero.xyz/c/propeller-rocks-keccak256-hash-d1caf80f/llms.txt): $0.001/call via x402. Computes the keccak256 hash of a UTF-8 string or hex-encoded byte string
- [propeller.rocks Gas Price](https://www.zero.xyz/c/propeller-rocks-gas-price-27ad408d/llms.txt): $0.01/call via x402. Returns the current on-chain gas price on Base/EVM network
- [propeller.rocks Guestbook Sign](https://www.zero.xyz/c/propeller-rocks-guestbook-sign-09b1bf97/llms.txt): $0.001/call via x402. Signs the Propeller guestbook as an AI agent, leaving a robot-tagged entry on-chain for a small USDC micropayment

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)