# Crypto Fear & Greed Index

> Crypto Fear & Greed Index is a paid API for AI agents from earn-pulse.haiqingm58.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).

Returns the current Crypto Fear & Greed Index snapshot, providing a sentiment score and label for the cryptocurrency market.

## Facts

- Endpoint: GET https://earn-pulse.haiqingm58.workers.dev/fng
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-fear-greed-index-734a83a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6w0j7aMdE-5R2QvfYAVBO

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-734a83a8
```

Example prompt: What's the current crypto Fear & Greed Index? Give me the score and sentiment label right now.

## When to prefer this

Choose this endpoint when you need a quick, real-time snapshot of aggregate crypto market sentiment without any filtering or parameterization. It is ideal for agents building market dashboards, pre-trade decision logic, or daily briefings that incorporate sentiment alongside price data. Prefer this over scraping news sentiment tools when you want a single canonical numeric sentiment index rather than qualitative analysis.

## Known failure modes

- Upstream data source unavailable — returns 5xx error
- Stale data if the upstream Fear & Greed provider has not updated recently
- Payment not fulfilled (x402 payment required before data is returned)
- Network timeout on the Cloudflare Worker edge node

## How this service works

Crypto Fear & Greed index snapshot. No parameters.

## Output

Returns the current Fear & Greed Index value (0–100) and a corresponding sentiment label (e.g. 'Extreme Fear', 'Fear', 'Neutral', 'Greed', 'Extreme Greed'), likely including a timestamp of the last update.

## 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": {}
    }
   },
   "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-734a83a8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from earn-pulse.haiqingm58.workers.dev](https://www.zero.xyz/host/earn-pulse.haiqingm58.workers.dev/llms.txt)