# x402stock Fear & Greed Index History

> x402stock Fear & Greed Index History is a paid API for AI agents from agents.x402stock.xyz, paid per call via x402 or MPP, $0.02/call, status unknown (last checked 2026-09-15).

Returns historical CNN Fear & Greed Index readings to track market sentiment over time

## Facts

- Endpoint: GET https://agents.x402stock.xyz/api/v1/fear-greed/history
- Price: $0.02/call
- Payment: x402, MPP
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402stock-fear-greed-index-history-ca7ae4f2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XMYlAcnMUw14UtYfoR839

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 x402stock-fear-greed-index-history-ca7ae4f2
```

Example prompt: Pull the historical Fear & Greed Index readings for the past 90 days so I can see how market sentiment has shifted over time.

## When to prefer this

Choose this endpoint when you need time-series sentiment data rather than a single current reading. Ideal for backtesting, trend analysis, or comparing market mood across multiple historical periods. Prefer over current-snapshot endpoints when the user asks about how sentiment has changed, evolved, or trended over any past window.

## Known failure modes

- Payment not provided or insufficient USDC — returns 402 Payment Required
- Invalid or malformed request body — returns 400 Bad Request
- Date range outside available historical data — returns empty result set or 404
- Network timeout on upstream data provider — returns 503 Service Unavailable
- Requested properties field not recognized — may return partial or empty data

## How this service works

The full daily history of the US stock Fear & Greed index from 2016 to today, each point a date and 0–100 score. Pass `?days=N` to return only the most recent N days (default: full series). Use for charting sentiment regimes and backtesting against price. Companion to /api/v1/fear-greed (current reading). From x402stock, a market & economic data API (x402, USDC).

## Output

Returns a time series of historical Fear & Greed Index readings, each entry including a numeric score (0–100), a sentiment label (Extreme Fear, Fear, Neutral, Greed, Extreme Greed), and a timestamp. Useful for charting sentiment trends, backtesting, and comparing market mood across different periods.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402stock-fear-greed-index-history-ca7ae4f2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.x402stock.xyz](https://www.zero.xyz/host/agents.x402stock.xyz/llms.txt)