ERC Detector API
Tell what kind of contract an address actually is — live, by asking the chain itself. It probes the contract over the public JSON-RPC (eth_call, no key): an ERC-165 interface sweep (ERC-721, ERC-1155 and their metadata/enumerable/royalty extensions) plus an ERC-20 function probe (name, symbol, decimals, totalSupply), and classifies the address as an ERC-20 token, an NFT (ERC-721), a multi-token (ERC-1155), a plain contract or an externally-owned account. A dedicated endpoint returns a token's live on-chain ERC-20 metadata — working for ANY token, including brand-new ones no token list has yet indexed. The "what is this address" primitive every wallet, explorer, scanner and security tool needs, across Ethereum, Base, Arbitrum, Optimism, BNB, Polygon and more. Reads straight from the chain; live, short cache only.
api.oanor.com/ercdetector-api
