# Crypto Fear & Greed Index – Today's Value and History

> Crypto Fear & Greed Index – Today's Value and History is a paid API for AI agents from agent-data-tools.revmesh2074.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Returns the current Crypto Fear & Greed Index value, classification, change vs 1/7/30 days ago, range stats, and daily history up to 90 days from alternative.me

## Facts

- Endpoint: GET https://agent-data-tools.revmesh2074.workers.dev/crypto/fear-greed?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Provider: agent-data-tools.revmesh2074.workers.dev
- Website: https://agent-data-tools.revmesh2074.workers.dev
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-data-tools-revmesh2074-workers-dev-crypto-fear-greed-index-3b31dfe1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dsPcc4czBH_djGjq3jQvE

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 agent-data-tools-revmesh2074-workers-dev-crypto-fear-greed-index-3b31dfe1
```

Example prompt: What's the crypto Fear & Greed Index today — give me the current value and label, how it's changed over the last 7 days, and the daily history for the past 30 days.

## When to prefer this

Choose this endpoint when you need the standardized alternative.me Crypto Fear & Greed Index — the most widely cited crypto sentiment indicator — including its historical trend, range stats, and day-over-day changes. It is updated once a day so it is not suitable for intraday sentiment; for live token prices use a price endpoint. Prefer this over scraping alternative.me directly or building your own index from raw data.

## Known failure modes

- Invalid 'days' value outside 1–90 returns a validation error
- Upstream alternative.me outage may result in stale or unavailable data
- Network timeout on the Cloudflare Worker may return a 5xx error
- Requesting days=1 returns minimal history and may show no meaningful change stats

## How this service works

The Crypto Fear & Greed Index (0 = extreme fear, 100 = extreme greed) from alternative.me: today's value and label, the change against 1, 7 and 30 days ago, the low, high and average over the window, and the daily history (up to 90 days, default 30). Updated once a day. Use as a market-sentiment input for a trading agent, a dashboard or a daily brief; for live prices use price_token.

## Output

A JSON object containing today's Fear & Greed index value (0–100) and classification (e.g. 'Extreme Fear', 'Greed'), the change in index points vs 1, 7, and 30 days ago, the low, high, and average over the requested window, an array of daily {date, value, classification} history entries, the data source attribution, and seconds until the next update.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "days": {
   "type": "integer",
   "description": "Days of history, 1-90 (default 30)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "date": {
   "type": "string"
  },
  "range": {
   "type": "object",
   "properties": {
    "low": {
     "type": "number"
    },
    "days": {
     "type": "number"
    },
    "high": {
     "type": "number"
    },
    "average": {
     "type": "number"
    }
   }
  },
  "value": {
   "type": "number"
  },
  "change": {
   "type": "object",
   "properties": {
    "vs1d": {
     "type": "number"
    },
    "vs7d": {
     "type": "number"
    },
    "vs30d": {
     "type": "number"
    }
   }
  },
  "source": {
   "type": "string"
  },
  "history": {
   "type": "array",
   "items": {
    "type": "object",
    "properties": {
     "date": {
      "type": "string"
     },
     "value": {
      "type": "number"
     },
     "classification": {
      "type": "string"
     }
    }
   }
  },
  "attribution": {
   "type": "string"
  },
  "classification": {
   "type": "string"
  },
  "nextUpdateSeconds": {
   "type": "number"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-data-tools-revmesh2074-workers-dev-crypto-fear-greed-index-3b31dfe1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-data-tools.revmesh2074.workers.dev](https://www.zero.xyz/host/agent-data-tools.revmesh2074.workers.dev/llms.txt)