Contract Bytecode API
Fetch any smart contract's deployed EVM bytecode live from the chain's public JSON-RPC, disassemble it into human-readable opcodes, and extract the 4-byte function selectors from its dispatcher. Unlike source-verification or 4-byte directories, this works on ANY deployed contract — verified or not — so it reveals the raw on-chain logic of contracts nobody has published source for. Give it a chain and an address and get the runtime bytecode, a full offset-by-offset opcode disassembly (paged), and the detected function selectors. The reverse-engineering layer for auditors, MEV searchers and security tooling. Reads straight from the chain across Ethereum, Base, Arbitrum, Optimism, BNB, Polygon and more. Live, short cache only.
api.oanor.com/bytecode-api
