> ## Documentation Index
> Fetch the complete documentation index at: https://docs.noxint.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# What the engine covers

> The asset universe, the domains per plane, the venues behind consensus, and how deep history goes

<Note>
  The API and MCP server are in production today, grounding the chat
  analyst's market answers. The discovery surface is already public: run
  `curl https://noxint.ai/api/v1` right now, with no key, and the contract
  answers. Key minting and paid access open in beta after launch; credit
  packs are rolling out with launch. [Launch status](/token/status) tracks
  exactly what is on.
</Note>

"Crypto and US equities" is a slogan until it comes with numbers. These are
the numbers, and every one of them was read off the live engine on
2026-07-16: asset counts and history depth from the `coverage` operation,
venues and baselines from the payloads themselves. The universe moves as
markets do; `coverage` is free to call and always current.

## Crypto

The crypto plane has three classes:

* **Core** is the derivatives-grade universe: 489 assets on the day of
  capture, listed exhaustively by one free call. Core assets carry the full
  domain set: price, funding, open interest, order flow, liquidations,
  order-book liquidity, technicals, market structure, history, and the
  `rank` screener.
* **Listed tokens** are the long tail with live markets: price, technicals,
  structure, and history, without the derivatives domains.
* **Contract tokens** are addressable by contract: `crypto:eip155-<chainId>:<address>`
  on EVM chains and `crypto:solana:<mint>` on Solana. If it trades, it
  resolves; what cannot be proved about it is refused, not padded.

Derivatives facts are cross-venue. The consensus set observed live: Binance,
Bybit, OKX, and Hyperliquid, with per-venue rates, quotes, and volumes in
`by_venue` blocks and the spread between venues served as its own
percentile-ranked fact.

Percentile context is computed against each asset's own baseline, stated in
every response: 90 days at 1-hour cadence for price and flow (n=2160), 90
days at 8-hour cadence for funding (n=180), 90 days at 4-hour cadence for
structure and technicals (n=539). Longer windows appear as `pctl_1y` where
history supports them.

## US equities

Equity identity is keyed to the SEC: `eq:<10-digit CIK>:<mnemonic>`, which
means the universe is defined by filings, not by an index membership list.
Resolution returns exchange-listed names alongside OTC filers.

* **Filed facts:** `financials` serves statements as filed, by period, as
  exact decimal strings with the form, accession number, and filing date of
  every period. `fundamentals` is the TTM snapshot, `valuation` and `growth`
  the derived ratios, each stamped with `filings_indexed_through` so you
  know exactly how fresh the filing index is.
* **The event stream:** filings, insider (Form 4) trades, dividends, and
  splits, with a 90-day insider summary.
* **Ownership:** 13F holders with per-manager report periods, a
  `periods_behind` staleness count, and stale filings quarantined out of
  aggregates by name.
* **Market data:** daily price, returns, technicals, and history. Equity
  quotes are end-of-day; nothing here pretends to be a real-time equity
  tape.

## History depth

From the live per-asset coverage detail for `crypto:bitcoin`:

```json theme={null}
{
  "series_depth": { "15m": "90d", "1h": "90d", "4h": "90d-agg", "1d": "365d" },
  "universe_membership": "current"
}
```

Intraday bars go back 90 days, daily bars a year. Filed equity history goes
as deep as the filings: `financials` serves up to 20 periods per request.

## Ask the engine, not the docs

Coverage is itself an operation, and it costs nothing:

```bash theme={null}
# the whole core tier, exhaustively
curl -H 'Authorization: Bearer nx_your_key' \
  'https://noxint.ai/api/v1/coverage?plane=crypto&tier=core&limit=500'

# everything one asset supports, domain by domain
curl -H 'Authorization: Bearer nx_your_key' \
  'https://noxint.ai/api/v1/coverage?id=crypto:bitcoin'
```

The per-asset form returns a covered/not-covered verdict for every operation
with a typed reason where the answer is no (`wrong_plane`,
`not_asset_scoped`), so an agent can plan a workload without burning a
credit to find a refusal.