# Crypto Fear & Greed Index

> Crypto Fear & Greed Index is a paid API for AI agents from finance-api.kdlcfa.workers.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).

Returns the current Crypto Fear & Greed Index (0-100) sentiment score for Bitcoin and major cryptocurrencies via Alternative.me

## Facts

- Endpoint: GET https://finance-api.kdlcfa.workers.dev/crypto-fear-greed
- Price: $0.03/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-8780d362
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ByuGIsddAnStZWwVdVOpY

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-8780d362
```

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

## When to prefer this

Use this endpoint when you need a quick, single-number gauge of overall crypto market sentiment without constructing complex queries. It is ideal for dashboards, trading signal workflows, or any agent that needs to contextualize crypto market mood. Prefer it over scraping or parsing news headlines when a standardized, numeric sentiment score is needed.

## Known failure modes

- Upstream Alternative.me API unavailability returns an error or stale data
- Rate limiting or Cloudflare Worker timeout if the upstream source is slow
- Score may be up to 24 hours old since it is a daily index, not real-time

## How this service works

Crypto Fear & Greed Index (0-100) via Alternative.me, daily sentiment gauge for Bitcoin and major cryptocurrencies

## Output

Returns a numeric score from 0 to 100 representing crypto market sentiment (0 = Extreme Fear, 100 = Extreme Greed), along with a corresponding sentiment label and timestamp, sourced daily from Alternative.me.

## 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",
     "required": [],
     "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-8780d362/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from finance-api.kdlcfa.workers.dev](https://www.zero.xyz/host/finance-api.kdlcfa.workers.dev/llms.txt)