14 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.
Reads who controls a contract straight from chain: owner/getOwner/admin, pending owner, EIP-1967 proxy implementation + admin, and paused state — and whether the owner is a single EOA key (one compromise = total control)...
NFT Owner Lookup: Ethereum mainnet ERC-721 owner of any token ID. Lists the NFT token ids an address holds in one ERC-721 collection on Ethereum mainnet, read from chain state at the latest block.
NFT owner, Arbitrum. Owner of an NFT on Arbitrum One: the wallet that holds one ERC-721 token id right now (ownerOf), plus the collection's name and symbol. Use to verify who holds an NFT before a trade, a mint gate or a...
NFT owner, Base. Owner of an NFT on Base: the wallet that holds one ERC-721 token id right now (ownerOf), plus the collection's name and symbol. Use to verify who holds an NFT before a trade, a mint gate or an airdrop; f...
NFT owner, Ethereum. Owner of an NFT on Ethereum: the wallet that holds one ERC-721 token id right now (ownerOf), plus the collection's name and symbol. Use to verify who holds an NFT before a trade, a mint gate or an ai...
NFT owner, Optimism. Owner of an NFT on Optimism: the wallet that holds one ERC-721 token id right now (ownerOf), plus the collection's name and symbol. Use to verify who holds an NFT before a trade, a mint gate or an ai...
NFT owner, Polygon. Owner of an NFT on Polygon PoS: the wallet that holds one ERC-721 token id right now (ownerOf), plus the collection's name and symbol. Use to verify who holds an NFT before a trade, a mint gate or an...
Wallet balance on Base: the native ETH balance of any address, read live from the chain. Input: address
NFT Owner Lookup: Ethereum mainnet ERC-721 owner of any token ID. Returns the owner address of an ERC-721 token on Ethereum mainnet. Takes token (contract address, 0x plus 40 hex) and id (decimal token id).
Who owns this NFT? Calls ownerOf(tokenId) on any ERC-721 contract on Ethereum, Base, Polygon, Arbitrum, or Optimism. Complements nft-holdings (which lists a WALLET's NFTs) - this answers by TOKEN. Keyless multi-endpoint...
Breached password check: is this password in known data breaches, and how often? Send only the SHA-1 hash (never the password); just the first 5 characters reach Have I Been Pwned (k-anonymity). Up to 50 hashes per call.
Current owner of an ERC-721 NFT by contract and token ID. Use to verify ownership for token gating, sales or airdrops.
UTC time and latest Base block. Use when you need a clock.
List the US-registered aircraft held by an owner name in the public FAA Aircraft Registry (fleet lookup). Give an owner or company name and get the matching aircraft, each with its tail number, serial and make and model....