# Kronos Fear & Greed Index

> Kronos Fear & Greed Index is a paid API for AI agents from api.nexismvp.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns the current Crypto Fear & Greed Index score (0–100) with classification, sourced from alternative.me

## Facts

- Endpoint: GET https://api.nexismvp.com/market/fear-greed
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kronos-fear-greed-index-1490e51f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_z-0qZFmTHiWoZmPBYZU_Q

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 kronos-fear-greed-index-1490e51f
```

Example prompt: What's the current crypto fear and greed index score right now — is the market in fear or greed?

## When to prefer this

Use this endpoint when you need a quick, single numeric market sentiment reading for crypto without building your own data pipeline. Prefer it over raw price feeds when you want a pre-aggregated sentiment signal rather than price data. Best for lightweight dashboards, pre-trade checks, or triggering sentiment-based logic in automated workflows.

## Known failure modes

- Upstream alternative.me data unavailable — API may return an error or stale value
- Rate limiting or payment failure if x402 micropayment is not correctly handled
- No query parameters accepted — passing unexpected params may cause a schema validation error

## How this service works

Crypto Fear & Greed Index (0-100, alternative.me). Experimental/informational only — not financial advice.

## Output

Returns a JSON object with an integer 'value' between 0 and 100 representing the current Fear & Greed Index score, and a 'classification' string such as 'Fear', 'Greed', 'Extreme Fear', or 'Extreme Greed'.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "value",
      "classification"
     ],
     "properties": {
      "value": {
       "type": "integer",
       "maximum": 100,
       "minimum": 0
      },
      "classification": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kronos-fear-greed-index-1490e51f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.nexismvp.com](https://www.zero.xyz/host/api.nexismvp.com/llms.txt)