# Crypto Fear & Greed Index

> Crypto Fear & Greed Index is a paid API for AI agents from www.x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Returns the current crypto market Fear & Greed Index reading (0–100) plus 7-day and 30-day sentiment trend analysis (direction, average, and point change) sourced from alternative.me.

## Facts

- Endpoint: GET https://www.x402financialdata.com/fear-greed
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-fear-greed-index-8335ce45
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QNlGgKa5QoqoGnbnZaSv0

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-fear-greed-index-8335ce45
```

Example prompt: What's the current crypto Fear & Greed Index score, and has overall market sentiment been rising or falling over the past 30 days?

## When to prefer this

Choose this endpoint when you need a real-time, market-wide crypto sentiment signal with trend context — not just a single number snapshot. Ideal for trading dashboards, contrarian signal detection, or periodic sentiment reporting workflows. Prefer over raw alternative.me API when you need the 7-day and 30-day trend analysis pre-computed in one call. Not suitable for ticker-specific sentiment or equity market sentiment.

## Known failure modes

- Upstream alternative.me API unavailability may cause stale or missing data
- Invalid limit parameter type returns a validation error
- No ticker-specific filtering is supported — index is market-wide only
- Payment failure (insufficient USDC) returns a 402 error

## How this service works

Crypto Fear & Greed Index: current reading (0-100, Extreme Fear to Extreme Greed) plus 7-day and 30-day sentiment trend (rising/falling/flat with the average and point change), not just a single snapshot number. Not ticker-specific. Data from alternative.me. $0.01/call.

## Output

Returns the current Fear & Greed Index value (0–100 mapped to labels like Extreme Fear, Fear, Neutral, Greed, Extreme Greed), plus 7-day and 30-day sentiment trend summaries including the trend direction (rising/falling/flat), the average score over the period, and the net point change across the window. Optionally returns historical daily readings if a limit parameter is provided.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "limit": {
       "type": "integer",
       "description": "Days of history to return, default 30."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-fear-greed-index-8335ce45/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.x402financialdata.com](https://www.zero.xyz/host/www.x402financialdata.com/llms.txt)