# Crypto Fear & Greed Index

> Crypto Fear & Greed Index is a paid API for AI agents from crypto-asistent.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-13).

Returns the current and previous Crypto Fear & Greed Index values with classifications and recent historical readings for market sentiment analysis.

## Facts

- Endpoint: POST https://crypto-asistent.com/api/x402/data/fear-greed?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-fear-greed-index-9098115b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dlqzptSA-uBhhUyoanUr6

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-9098115b -d '<json body>'
```

Example prompt: What's the current Crypto Fear & Greed Index — give me the value, the classification, and how it compares to yesterday so I can see whether we're in accumulation or distribution territory?

## When to prefer this

Choose this endpoint when you need a quick, structured sentiment reading — specifically the Fear & Greed Index — as a filter or context layer for crypto trading decisions, market commentary, or portfolio review. It is especially useful when combining sentiment with funding rates, dominance data, or macro catalysts from sibling endpoints on the same platform. Prefer it over a generic AI crypto analyst endpoint when you need the raw index value and classification rather than an interpreted stance.

## Known failure modes

- Payment not processed — 402 response if USDC payment via x402 protocol fails
- Data source unavailable — index provider may be temporarily unreachable, resulting in a 5xx error
- Stale data — index updates periodically so real-time freshness is not guaranteed
- Malformed request body — if the input wrapper is not correctly structured, a 400 error may be returned

## How this service works

Crypto Fear & Greed Index: current and previous value with classification, plus recent history. A contrarian input — extreme fear has historically marked accumulation zones and extreme greed distribution zones — but it is a filter, never a trigger on its own. Pair it with funding to separate real capitulation from a crowded short.

## Output

Returns the current Crypto Fear & Greed Index numeric value (0–100) and its classification (e.g. Extreme Fear, Fear, Neutral, Greed, Extreme Greed), the previous value with its classification, and a short recent history of index readings — all usable as a contrarian sentiment filter for crypto market positioning.

## 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"
    },
    "pathParams": {
     "type": "object"
    }
   },
   "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-9098115b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from crypto-asistent.com](https://www.zero.xyz/host/crypto-asistent.com/llms.txt)