# Crypto Fear & Greed Index

> Crypto Fear & Greed Index is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).

Returns the current Crypto Fear & Greed Index value (0-100) with its sentiment classification, sourced from Alternative.me

## Facts

- Endpoint: POST https://api.vextorium.com/fear-greed-pago?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-fear-greed-index-ec325b78
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HOD-vmk6oOqe5kMBeVqO3

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-ec325b78 -d '<json body>'
```

Example prompt: What's the current crypto Fear & Greed Index — give me the number and its classification so I know if the market is in extreme fear or greed right now.

## When to prefer this

Use this endpoint when you need a simple, real-time scalar sentiment indicator for the overall crypto market. Prefer this over custom sentiment analysis when you want the widely-recognized Alternative.me Fear & Greed Index specifically, or when you need a quick contrarian signal for crypto trading decisions without building your own data pipeline.

## Known failure modes

- Upstream Alternative.me data unavailable — index value may be null
- Network timeout connecting to data source
- Stale or delayed data if upstream provider hasn't updated
- Malformed request body causing 400 error

## How this service works

Crypto Fear & Greed Index (0-100) with classification. Data source: Alternative.me (attribution included in the response).

## Output

Returns a JSON object with: a numeric value (0-100) representing market sentiment, a classification label (e.g. 'Extreme Fear', 'Fear', 'Neutral', 'Greed', 'Extreme Greed'), the date of the reading, the data source attribution (Alternative.me), and an optional notice/aviso field.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [],
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "aviso": {
       "type": [
        "string",
        "null"
       ]
      },
      "fecha": {
       "type": [
        "string",
        "null"
       ]
      },
      "valor": {
       "type": [
        "number",
        "null"
       ]
      },
      "fuente": {
       "type": [
        "string",
        "null"
       ]
      },
      "clasificacion": {
       "type": [
        "string",
        "null"
       ]
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "fecha": "1789257600",
  "valor": 61,
  "fuente": "Alternative.me Crypto Fear & Greed Index",
  "clasificacion": "Greed"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-fear-greed-index-ec325b78/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)