# Crypto Fear & Greed Index

> Crypto Fear & Greed Index is a paid API for AI agents from crypto.openverbs.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns the current Crypto Fear & Greed Index (0–100 with classification) and optionally a short historical series of up to 30 days.

## Facts

- Endpoint: POST https://crypto.openverbs.com/v1/sentiment
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-fear-greed-index-a3e4e1c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H0gjy6d8pTWOuOLbNnoXE

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-a3e4e1c5 -d '<json body>'
```

Example prompt: What's the current crypto Fear & Greed index score and classification, and can you also include the last 7 days of history?

## When to prefer this

Choose this endpoint when you need a quick, structured sentiment signal for the overall crypto market — especially if you want a historical series alongside today's reading. It is ideal for dashboards, trading signals, or any workflow that needs a normalized 0–100 fear/greed score with a classification label rather than raw price data.

## Known failure modes

- limit out of range (must be 1–30) returns a validation error
- payment not included or insufficient returns 402 Payment Required
- service unavailable returns 5xx error
- missing required body wrapper returns 400 bad request

## How this service works

Crypto Fear & Greed index (0–100, with classification). Optionally include a short historical `series`.

## Output

Returns a JSON object containing the current Fear & Greed index value (0–100), its human-readable classification (e.g. 'Extreme Fear', 'Greed'), and optionally an array of daily historical data points covering up to 30 days, each with a date, score, and classification.

## 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": {
     "type": "object",
     "required": [],
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 30,
       "minimum": 1,
       "description": "How many days of history to return in `series` (default 1 = today only)."
      }
     },
     "additionalProperties": false
    },
    "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"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-fear-greed-index-a3e4e1c5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crypto.openverbs.com](https://www.zero.xyz/host/crypto.openverbs.com/llms.txt)