# Crypto Fear & Greed Index - Sentiment Score

> Crypto Fear & Greed Index - Sentiment Score is a paid API for AI agents from crypto.apitoll.cloud, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14, last successful call 2026-07-17).

Returns the current Crypto Fear & Greed Index score (0–100) and classification, with optional daily history up to 90 days, sourced from Alternative.me.

## Facts

- Endpoint: GET https://crypto.apitoll.cloud/v1/crypto/sentiment
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Last successful call: 2026-07-17
- Success rate: 100% of calls made through Zero
- Activations on Zero: 1
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-fear-greed-index-sentiment-score-f22671c9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_e_az-qJwGf7QbmAq_7f7A

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-sentiment-score-f22671c9
```

Example prompt: What's the current Crypto Fear & Greed index score and classification, and can you also pull the last 7 days of daily history so I can see how sentiment has been trending?

## When to prefer this

Use this endpoint when you need the widely-recognized Alternative.me Crypto Fear & Greed Index as a contrarian market-timing signal, especially when you want both the current reading and historical daily trend data in a single call. Prefer this over general market data endpoints when the specific goal is gauging investor sentiment or identifying extreme fear/greed conditions.

## Known failure modes

- limit parameter out of range (1–90) returns validation error
- Upstream Alternative.me data unavailable causes fetch failure
- Missing or malformed query parameter returns 400 error
- Payment not processed (x402 payment required) returns 402 error

## How this service works

The Crypto Fear & Greed index: the current market-sentiment score (0–100) and its classification (Extreme Fear → Extreme Greed), plus optional daily history. A widely-watched contrarian signal for crypto market timing. Sourced from Alternative.me.

## Output

Returns the current sentiment score (0–100), its classification label (e.g. Extreme Fear, Fear, Neutral, Greed, Extreme Greed), the date the reading is as of, a count of results, the data source name, and optionally an array of historical daily records each containing score, classification, timestamp, and date — up to 90 days back.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "limit": 7
  }
 }
}
```

## 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",
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 90,
       "minimum": 1,
       "description": "Days of history to include (1–90, default 1 = latest only)."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": "string"
      },
      "count": {
       "type": "number"
      },
      "value": {
       "type": "number"
      },
      "source": {
       "type": "object",
       "properties": {
        "name": {
         "type": "string"
        }
       }
      },
      "history": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "asOf": {
          "type": "string"
         },
         "value": {
          "type": "number"
         },
         "timestamp": {
          "type": "number"
         },
         "classification": {
          "type": "string"
         }
        }
       }
      },
      "classification": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "asOf": "2026-06-15T00:00:00Z",
  "count": 1,
  "value": 20,
  "source": {
   "name": "Alternative.me"
  },
  "history": [
   {
    "asOf": "2026-06-15T00:00:00Z",
    "value": 20,
    "timestamp": 1781481600,
    "classification": "Extreme Fear"
   }
  ],
  "classification": "Extreme Fear"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-fear-greed-index-sentiment-score-f22671c9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crypto.apitoll.cloud](https://www.zero.xyz/host/crypto.apitoll.cloud/llms.txt)