# QuantX402 News Headlines with Tone Scores

> QuantX402 News Headlines with Tone Scores is a paid API for AI agents from quantx402.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).

Fetches recent news headlines for a crypto or stock/ETF symbol, each scored for tone, plus an average tone across all results

## Facts

- Endpoint: GET https://quantx402.app/api/v1/news?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantx402-news-headlines-with-tone-scores-f68b4511
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_APAIz3946wn2tgQbR_-ub

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 quantx402-news-headlines-with-tone-scores-f68b4511
```

Example prompt: Can you pull the latest news headlines for BTC-USD from the past 48 hours and show me each one with its tone score plus the overall average tone?

## When to prefer this

Choose this endpoint when you need per-headline tone scores alongside raw news content for a specific supported symbol, especially when you want to distinguish between a genuine absence of news (empty) and neutral sentiment. Prefer it over generic news APIs when you need structured tone scoring integrated directly with market-relevant crypto and equity symbols, and when pay-per-call pricing ($0.01 USDC) is acceptable for on-demand, low-latency lookups.

## Known failure modes

- Symbol not supported — only specific crypto pairs and stock/ETF tickers are accepted
- hours parameter out of range (must be 1–168)
- limit parameter out of range (must be 1–100)
- No news found for symbol in requested time window — returns empty, no charge
- Payment failure via x402 protocol — call not processed
- Service unavailable or upstream news pipeline error

## How this service works

News: recent headlines for one symbol from our own news pipeline, each with a tone score, plus the average tone. Empty results are reported as empty (never charged), not as neutral. Experimental. Not financial advice.

## Output

Returns a list of recent news headlines for the requested symbol, each accompanied by a numeric tone score indicating positive or negative sentiment, along with an aggregated average tone across all returned items. If no news is found, an empty result is returned rather than a neutral placeholder (and no charge is applied).

## 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": [
      "symbol"
     ],
     "properties": {
      "hours": {
       "type": "integer",
       "maximum": 168,
       "minimum": 1
      },
      "limit": {
       "type": "integer",
       "maximum": 100,
       "minimum": 1
      },
      "symbol": {
       "type": "string",
       "description": "Crypto pair (BTC-USD, ETH-USD, SOL-USD, XRP-USD, BNB-USD, DOGE-USD, ADA-USD, AVAX-USD, LINK-USD, SUI-USD) or stock/ETF (SPY, QQQ, AAPL, NVDA, TSLA, MSFT, AMZN, META, GOOGL, IWM, DIA)"
      }
     }
    }
   },
   "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/quantx402-news-headlines-with-tone-scores-f68b4511/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quantx402.app](https://www.zero.xyz/host/quantx402.app/llms.txt)