51 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
ENS resolve on Ethereum: a .eth name to its address (?name=vitalik.eth), or an address to its primary ENS name (?address=0x...), forward-verified so a reverse record pointing elsewhere is never returned as the name.
ENS resolve (name ⇄ address), $0.001 USDC per call: Resolve an ENS name (vitalik.eth, also *.base.eth via CCIP) to its Ethereum address, or reverse-resolve an address to its primary ENS name (forward-verified), plus avat...
Base or Ethereum contract address -> ABI and function list: Sourcify verification (exact/partial match), contract name, compiler, ABI, function selectors + signatures, event topics; proxies (EIP-1967, ZeppelinOS, others...