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propeller.rocks Function Selector / Event Topic0 Computer
x402
propeller.rocks Function Selector / Event Topic0 Computer is a paid API for AI agents from propeller.rocks, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Computes the 4-byte function selector or 32-byte event topic0 hash from an ABI function or event signature
Price / call$0.001
Success—
StatusUnknown
How this service works
Compute the 4-byte function selector or event topic0 from a signature
Output
Returns the 4-byte function selector (for function signatures) or 32-byte topic0 hash (for event signatures) derived from the keccak256 hash of the input signature string, as a hex-encoded value.
Example use cases
Example prompt
“What's the 4-byte function selector for the Solidity signature transfer(address,uint256)?”
Technical details
Endpoint
GEThttps://propeller.rocks/selectorWhen to prefer
Use this endpoint when you need to derive the canonical 4-byte selector or event topic0 from a human-readable Solidity function or event signature, without running a full ABI encoder or local keccak256 library. Ideal for EVM tooling workflows where you need to identify or filter transactions and logs by selector.
Side effects
- Invalid or malformed signature string returns an error
- Missing signature input returns a validation error
- Network or payment failure results in no response
- Ambiguous signature format may produce unexpected results
Tags
x402
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