1.2M
method_selectors
selector TEXT PK · signature TEXT
Every 4-byte function selector seen across 4byte and openchain,
mapped to its canonical name(arg,arg,…) signature.
search any selector, event,
or contract address.
1,197,931 method selectors · 283,432 event signatures · 39,302 labeled contracts across every major protocol. Loading last update…
api
GET /api/search?q=<anything>
GET /api/selector/0xa9059cbb
GET /api/event/0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef
GET /api/address/0xdac17f958d2ee523a2206206994597c13d831ec7
GET /api/protocol/uniswap-v3Backed by curated reference data.
Three Postgres tables power kecc.sh, augmented at query time by our engineer for canonical signatures. Everything the API returns comes from one of these.
283k
event_signatures
topic0 TEXT PK · name TEXT
Keccak-256 event topic0s mapped to the bare name. The full
Swap(address,…) signature is resolved on demand
from our engineer and cached 24 h.
39k
contract_whitelist
(address, chain_id) PK · 21 label columns
Labeled contracts from kecc.sh joined with the selectors and topic0s they actually expose. Lets you go from an address straight to every function it implements.
GET /api/address/…