NFT ownership across an entire chain isn’t a cheap RPC call
A single ownerOf call can confirm who owns one specific NFT, but there’s no equivalent “list everything this address owns” built into the base protocol — that requires an index of every mint and transfer across every collection, continuously maintained.
How this tool works
Queries an NFT-indexing API for everything owned by the address you enter on the chain you pick, and renders each one with its image, name, and collection — a live snapshot of what’s actually in that wallet right now.