# Money Reactor — Crypto Fear & Greed Index

> Money Reactor — Crypto Fear & Greed Index is a paid API for AI agents from mr-river8.makar52nn2016.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).

Returns the current Crypto Fear & Greed Index score, classification, and recent historical values, paid per call in USDC on Base via x402.

## Facts

- Endpoint: GET https://mr-river8.makar52nn2016.workers.dev/api/fear-greed?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/money-reactor-crypto-fear-greed-index-676b734d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qasVANFMDAXrG6pPt_Mz7

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 money-reactor-crypto-fear-greed-index-676b734d
```

Example prompt: What's the current Crypto Fear & Greed Index score right now, and how does it compare to yesterday and a week ago?

## When to prefer this

Choose this endpoint when you need a quick, no-account, no-API-key sentiment gauge for the overall crypto market, billed at $0.001 USDC per call on Base. Prefer it over free alternatives when operating in an x402-native agent stack where on-chain micropayments are already set up and you need the fear & greed metric alongside other Money Reactor data (prices, news, etc.) in a single provider ecosystem.

## Known failure modes

- Payment not received or x402 handshake fails — returns 402 Payment Required
- Upstream alternative.me API unavailable — returns 5xx or empty data
- Malformed request — returns 400 Bad Request
- Network timeout from Cloudflare Worker — returns 504

## How this service works

22 agent-native micro APIs paid per call in USDC on Base via x402: funded bounty radar, honeypot trust scoring, token safety verdicts, crypto prices, multi-asset price snapshots, fear & greed index, full market-pulse snapshot, AI chat completion (Llama 3.1), crypto news, weather, web reader, ERC-20 balances. No accounts, no API keys — instant on-chain settlement.

## Output

Returns a JSON object with the current Fear & Greed Index numeric value (0–100), its textual classification (e.g. 'Greed', 'Fear', 'Neutral'), yesterday's value and classification, the value from 7 days ago with classification, and an array of the last 10 days of daily readings with values and classifications. Sourced from alternative.me.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "value": 71,
  "source": "alternative.me",
  "weekAgo": {
   "value": 55,
   "classification": "Neutral"
  },
  "yesterday": {
   "value": 68,
   "classification": "Greed"
  },
  "historyDays10": [
   {
    "value": 71,
    "classification": "Greed"
   }
  ],
  "classification": "Greed"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/money-reactor-crypto-fear-greed-index-676b734d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mr-river8.makar52nn2016.workers.dev](https://www.zero.xyz/host/mr-river8.makar52nn2016.workers.dev/llms.txt)