Business Profile
4byte.directory provides the Ethereum Signature Database, which maps Ethereum function signatures (first four bytes) and event signatures (32-byte Keccak hashes) to their human-readable representations.
{"Blockchain developers","Ethereum smart contract developers","API engineers","Security researchers"}
Free to use with no licensing restrictions, permissive data reuse, and a large, searchable dataset (1,414,682 signatures) with an API and data-submission features.
Not specified in the provided content
A database that maps Ethereum function and event signatures to human-readable representations, with capabilities to submit signatures, ABIs, and Solidity source, and to access via API.
Developers and teams building Ethereum smart contracts and DApps who need to decode transaction data
Free, license-free, openly accessible database of Ethereum signatures with a large dataset and API access for easy decoding of on-chain data
No specific requirements noted; API accessible; ability to scrape or run your own copy with limited concurrency
Free; no license restrictions
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