Scavenger Hunt · Haystack Needle

Give an address. Get back the exact card.

No download, no account, no AI model. Your own browser does all of it.

Press Run and this tab loads the 999 published cards and checks each one against its published hash. That becomes your store. Then it hunts for needles by address. Every card it finds is hashed again and must match exactly. Each answer comes back as a short pointer, not the whole card. One needle is made up on purpose, so it has to come back NOT FOUND.

The haystack is exactly what your tab holds: 999 cards, 4,310,316 bytes. This page searches that and nothing else.

How many needles to draw

Seed (same seed, same needles, same result)

Your own needles (optional): one per line, a 32-character address or a question number like "qid 101"

Pressing Run downloads the 999 cards (about 4.3 MB) from this site, the same cards Prove It uses. Nothing is sent anywhere.

An address is a Hex Connector: the first 32 hex characters of sha256 over the card's pearl, "hollerith_card:qid<N>:sha256:<card sha256>". It binds the exact bytes, so a changed card has a different address. Token counts here are estimates (characters divided by 3.5, rounded up). The Hex Connector receipt counted with the cl100k_base tokenizer, which does not ship in a browser. The hunt code is hunt_core.js and the card index is here. Both are loaded only after you press Run.