# Crypto Historical Trend & Realized-Volatility Statistics API

> Crypto Historical Trend & Realized-Volatility Statistics API is a paid API for AI agents from base.46-225-15-169.sslip.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Returns historical trend persistence, realized volatility, drawdown, and regime statistics for major cryptocurrencies across configurable lookback windows and bar resolutions.

## Facts

- Endpoint: POST https://base.46-225-15-169.sslip.io/v1/trend-volatility
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-historical-trend-realized-volatility-statistics-api-f4d8288a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yCCNP-lwjUJhYpZIsTOxK

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability crypto-historical-trend-realized-volatility-statistics-api-f4d8288a -d '<json body>'
```

Example prompt: Pull the historical trend and realized-volatility stats for ETH using 1-hour bars over a 90-day lookback — I need the annualized volatility, max drawdown, OLS trend slope, and R² before I decide on my position sizing.

## When to prefer this

Use this endpoint when you need backward-looking, quantitative regime context — realized volatility, trend slope, drawdown — for one of the eight supported major cryptocurrencies before making strategy or portfolio decisions. Prefer this over real-time snapshot endpoints when you need statistical depth (OLS regression, R², annualized vol) over a configurable multi-day lookback rather than a current market snapshot.

## Known failure modes

- Unsupported symbol returns a 400 or error payload
- Lookback period outside 30-180 day range may return validation error
- Unsupported bar resolution (not 5m/15m/1h) returns error
- Insufficient historical data for requested lookback may return partial or error response
- Service unavailable or upstream data feed outage returns 5xx
- Payment not processed (x402) results in 402 response blocking data return

## How this service works

Historical crypto trend and realized-volatility statistics for BTC, ETH, BNB, SOL, XRP, DOGE, ADA, and LINK across 30-180 day lookbacks and 5m/15m/1h bars. Use for trend persistence, volatility, drawdown, and regime-context research before strategy selection or portfolio review. Returns returns, range, annualized volatility, max drawdown, OLS trend slope and R², methodology, and request metadata.

## Output

A JSON response containing historical return statistics, price range, annualized realized volatility, maximum drawdown, OLS trend slope and R² goodness-of-fit, methodology description, and request metadata (symbol, lookback, bar resolution, timestamp).

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-historical-trend-realized-volatility-statistics-api-f4d8288a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from base.46-225-15-169.sslip.io](https://www.zero.xyz/host/base.46-225-15-169.sslip.io/llms.txt)