# Crypto Market Sentiment (Fear & Greed + News Blend)

> Crypto Market Sentiment (Fear & Greed + News Blend) is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

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

## Facts

- Endpoint: GET https://payai.agentstools.dev/crypto/sentiment-ctl
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-market-sentiment-fear-greed-news-blend-8f2c9520
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6OKMUEd3h2mQhLaOwJWKx

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-blend-8f2c9520
```

Example prompt: What's the current crypto market sentiment — is it bullish, bearish, or neutral? Give me the Fear and Greed index reading and how recent news headlines are shaping the overall mood, with a focus on Bitcoin.

## When to prefer this

Choose this endpoint when you need a single unified crypto sentiment signal that combines both behavioral market data (Fear & Greed index) and news-driven sentiment in one call. Prefer it over raw Fear & Greed APIs when news context matters, or over raw NLP sentiment APIs when you also need the quantitative index. Especially useful for coin-specific sentiment when you want both dimensions without stitching multiple sources together.

## Known failure modes

- No coin found matching the provided symbol — returns empty or error response
- RSS news feed unavailable — news sentiment component may be missing or stale
- Fear & Greed API (alternative.me) temporarily down — index value may be absent
- Invalid query parameter format — endpoint returns 400 or empty data
- Rate limiting or payment failure via x402 protocol — returns 402 Payment Required

## 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

Returns a composite sentiment object including the Fear & Greed index value (0–100), its classification (e.g. Extreme Fear, Fear, Neutral, Greed, Extreme Greed), its recent trend direction, aggregated news-headline sentiment polarity, and an overall bullish/bearish/neutral composite score — optionally scoped to a specific coin or keyword query.

## 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"
      }
     }
    }
   },
   "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-blend-8f2c9520/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)