# Crypto Market Sentiment (Fear & Greed + News)

> Crypto Market Sentiment (Fear & Greed + News) is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns a composite crypto market sentiment score blending the Fear & Greed index with aggregated news-headline sentiment, optionally filtered by coin or keyword.

## Facts

- Endpoint: GET https://payai.agentstools.dev/crypto/sentiment
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-market-sentiment-fear-greed-news-ec6d10e1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_A722yOh-4T-WdwbMhLhJ4

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-market-sentiment-fear-greed-news-ec6d10e1
```

Example prompt: What's the current crypto market sentiment for Bitcoin — give me the Fear & Greed index, the trend, and how the recent news headlines are leaning, bullish, bearish, or neutral?

## When to prefer this

Choose this endpoint when you need a single, pre-fused sentiment signal combining both the quantitative Fear & Greed index and qualitative news-headline sentiment in one call, rather than querying those sources separately. Ideal for crypto trading agents, portfolio dashboards, or decision-support workflows that need a quick bullish/bearish/neutral verdict with supporting context. Prefer this over raw price feeds when market mood and narrative tone matter more than tick-level price data.

## Known failure modes

- Coin ticker not recognized — returns error or falls back to market-wide F&G only
- News RSS feed temporarily unavailable — composite score may omit headline sentiment component
- Rate limit or payment failure — 402 response requiring valid x402 USDC payment
- Invalid query parameter type — schema validation error returned
- No headlines matching the query filter — news sentiment component returns neutral or empty

## How this service works

Composite crypto market sentiment: the Fear & Greed index (value, classification, trend) blended with aggregated news-headline sentiment into one bullish/bearish/neutral score, optionally focused on a coin or query. Data by alternative.me (attributed) + curated RSS headlines.

## Output

A composite sentiment object including the Fear & Greed index value and classification (e.g. 'Extreme Fear'), its recent trend direction, aggregated news-headline sentiment polarity, and a combined bullish/bearish/neutral verdict — optionally scoped to a specific coin or keyword filter.

## 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",
     "required": [],
     "properties": {
      "coin": {
       "type": "string",
       "description": "Focus news sentiment on a coin by ticker or name (BTC, ETH, ...); F&G is market-wide"
      },
      "query": {
       "type": "string",
       "description": "Free-text filter for the news-sentiment component"
      }
     }
    }
   },
   "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-market-sentiment-fear-greed-news-ec6d10e1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from payai.agentstools.dev](https://www.zero.xyz/host/payai.agentstools.dev/llms.txt)