FRESH OBSERVED ENDPOINT EVIDENCE · DATASET REVISION 292863
Compute the 4-byte function/error selector and full keccak topic from a solidity signature, e.g. transfer(address,uint256). For decoding tx input prefixes and matching event topics. function selector, 4byte, method id, event topic, keccak signature
Compute the 4-byte function/error selector and full keccak topic from a solidity signature, e.g. transfer(address,uint256). For decoding tx input prefixes and matching event topics. function selector, 4byte, method id, event topic, keccak signature
Endpoint
https://api.x402node.dev/crypto/selector
Category crypto_onchain
Capabilities compute byte function error
Routable now yes
Observed price $0.01
Craft score 81.2
Last probe 2026-07-29T01:26:09.595Z
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Machine-readable: capability profile · reputation evidence