Documentation

The record

Summary. Nox FZE, an independent company, records your venue's public market data. Each UTC hour becomes a sealed hour in a hash chain, delivered into storage you own within 15 minutes after the hour closes. If your storage or the recorder is unavailable, the hour arrives later. Anyone you share a sealed hour with can recompute its file hashes and its link to the hour before with openly available tools.

View as Markdown

What one sealed hour holds

Each channel your venue publishes (trades, order book, funding) has one directory per UTC hour. It holds the frames exactly as received, a normalized form of trades and the order book, and a manifest. Each normalized row references the frame it came from.

The manifest lists each file of the hour with its size and hash. It lists every reconnection and every gap Nox detects in your venue's message sequence. It carries the hash of the previous hour's manifest, which makes the hours a hash chain. Every UTC hour has a manifest, including an hour in which Nox received no messages.

The hash of an hour's manifest is that hour's root, and the next hour's manifest carries it. This root shows only that the hour is unchanged since Nox FZE sealed it, and which messages Nox FZE received from the venue's public interfaces and when. It gives no opinion on the venue or on its markets, volume, statements, controls or systems.

Who these pages are for

• Your venue's engineers, who read the exact contract before the first sealed hour arrives.
• Anyone you share a sealed hour with, such as a partner, a data aggregator or a researcher.
• AI agents working for your venue, which read, cite and run these pages. Each page has a Markdown version, and the complete documentation as one text file holds every page.

Pages

• Record format, version 1: the layout, encodings, files and manifests of a sealed hour, and the checks a verifier makes.
• Command-line verification: the manifest, each file's size and hash, and the link to the hour before, with jq, b3sum and zstd.
• Synthetic example hour: a synthetic sealed hour and the hour before it, as one download, with its listing and the expected result.
• Starting a record: the written request, the order form, storage you own, and the 30-day pilot.
• Questions venues ask: short answers to the questions a venue asks before a record starts, each with the page that states it in full.

To verify a sealed hour in your browser without installing anything, use Verification, the in-browser check of a sealed hour.