# Crypto Fear & Greed Index

> Crypto Fear & Greed Index is a paid API for AI agents from agentstoolshub.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-20).

Returns the current Crypto Fear & Greed Index score (0–100) with classification and up to 8 days of historical trend data, sourced live from alternative.me.

## Facts

- Endpoint: GET https://agentstoolshub.com/api/v1/live/crypto-fear-greed?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-fear-greed-index-9ae0a176
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0u8CLZoF6BKFxo51e0Fm_

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-9ae0a176
```

Example prompt: What's the current crypto fear and greed index score, and how has sentiment trended over the past 8 days?

## When to prefer this

Choose this endpoint when an agent needs a quick, live, single-number summary of overall crypto market sentiment with a short historical trend window. It is ideal for contrarian analysis, daily market briefings, or contextualizing trading decisions without needing to process raw market data.

## Known failure modes

- Upstream alternative.me API unavailable — returns error or stale data
- Invalid 'days' parameter (non-numeric or out of range) — may return error or default behavior
- Network timeout if alternative.me is slow to respond
- Payment failure if x402 micropayment is not completed — endpoint returns 402

## How this service works

The Crypto Fear & Greed Index: today's 0–100 sentiment score with its classification, plus the last 8 days for trend context. Sentiment blends volatility, momentum, social media, dominance and trends — a useful contrarian signal agents can cite with a number. Use this when an agent needs to market sentiment, live from alternative.me.

## Output

Returns today's Fear & Greed Index value (0–100) with a text classification (e.g. 'Extreme Fear', 'Fear', 'Neutral', 'Greed', 'Extreme Greed'), plus up to 8 days of prior daily scores and classifications for trend analysis.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "days": {
       "type": "number",
       "description": "Trend window (days)"
      }
     }
    }
   },
   "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-9ae0a176/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentstoolshub.com](https://www.zero.xyz/host/agentstoolshub.com/llms.txt)