What identifiers does the One Box understand?

Library of Congress numbers (LCCN, e.g. 63-12345), ISBN-10/13 (returns the exact Amazon listing), CD DIDX hub codes and label catalog numbers, UPC/EAN barcodes, and vinyl matrix/runout etchings (prefix-matched, since stamper suffixes vary copy to copy).

How does it know what kind of number I pasted?

It detects the shape — checksums for ISBNs, the year-prefix pattern for LCCNs, DIDX and catalog-number forms for discs — and checks every plausible index, returning ranked candidates rather than one blind guess.

What does a miss mean?

A structured answer, not a shrug: the response states exactly which indexes were checked (20.9M LCCN, 8.7M CD, 19M vinyl records), at what dataset version, with nearest neighbors when available. Absence is evidence, not proof.

Does it value or appraise items?

No. Identification only — what the item is, never what it's worth.

One Box — Look Up Any Book, CD or Vinyl Identifier

1 · Grab any number
Copyright page, disc hub, jacket spine, barcode, deadwax — whatever the object gives you.

2 · Paste it
Auto-detects the type — dashes, spaces, and case don’t matter. Paste triggers the lookup.

3 · Copy & go
One tap copies title/artist or ASIN — paste into AbeBooks, Amazon, eBay, Discogs, your sheet.

Any identifier

Try one: 63-7996DIDX-2113MPOSK032C1CK 40999

Books by LCCN or ISBN · CDs by DIDX/catalog/barcode · vinyl by deadwax matrix. Identification only — never valuations.

This session

“Copy all” gives tab-separated lines — paste straight into a spreadsheet. The list survives page reloads.

What’s under the hood

One free endpoint over every index we host: 20.9 million Library of Congress records, 8.7 million CD identifiers, and 19 million vinyl identifiers from Discogs open data. Developers and AI agents can call it directly — see the API spec, the coverage manifest, or the MCP server. For deeper workflows use the specialized tools: LCCN Lookup, CD Lookup, Vinyl Lookup, First Edition Checker.

Even a miss is an answer here: the response tells you exactly which indexes were checked and at what version, so “not found” carries real information. Found a mistake? Every reference page has a report form — accepted corrections are published with named credit.