# Crypto News Headlines with Sentiment API

> Crypto News Headlines with Sentiment API is a paid API for AI agents from cryptonews.hergertsynthora.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Aggregates and deduplicates real-time crypto news headlines from major RSS feeds, scoring each with bull/bear sentiment and filtering by asset ticker.

## Facts

- Endpoint: POST https://cryptonews.hergertsynthora.com/service
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-news-headlines-with-sentiment-api-35f9f064
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jux3YH3wdo_GfmfdaQA5-

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-news-headlines-with-sentiment-api-35f9f064 -d '<json body>'
```

Example prompt: Pull the top 10 BTC headlines right now with their bull/bear sentiment scores — I want to know if the market mood is leaning bullish or bearish before I place a trade.

## When to prefer this

Choose this endpoint when you need a fast, cheap ($0.001 USDC), real-time crypto news sentiment pulse aggregated from multiple authoritative sources without managing individual RSS feeds. Ideal for trading bots and quant agents that need a combined sentiment signal alongside headlines. Prefer over scraping individual news sites when you want deduplication, importance ranking, and a standardized bull/bear sentiment score in a single call.

## Known failure modes

- Invalid asset ticker returns empty results or 400 error
- Limit out of range (must be 1–50) returns validation error
- RSS feed sources temporarily unavailable may yield stale or fewer headlines
- Insufficient USDC balance on Base causes payment failure and no response
- No headlines matching the requested asset filter returns empty list

## How this service works

Real-time crypto news headlines with sentiment, ranked by importance. Aggregates keyless RSS feeds (CryptoPanic, CoinDesk, CoinTelegraph, Decrypt, Bitcoin Magazine) into deduplicated, freshness-and-source-weighted top headlines, each scored with a lexical bull/bear sentiment (very_bullish..very_bearish) plus an overall market sentiment. Filter by asset (BTC, ETH, SOL, XRP, and more) to get only headlines about that coin. Built for trading and quant agents that need a cheap, fast crypto news + sentiment pulse. Ed25519-signed. 0.001 USDC on Base. SYNTHORA.

## Output

Returns a ranked, deduplicated list of crypto news headlines (up to 50), each with a lexical sentiment label (very_bullish, bullish, neutral, bearish, very_bearish), source attribution (CryptoPanic, CoinDesk, CoinTelegraph, Decrypt, Bitcoin Magazine), freshness/importance weighting, and an overall aggregate market sentiment signal. Response is Ed25519-signed for authenticity.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "asset": {
   "type": "string",
   "description": "Optional ticker to filter headlines, e.g. BTC, ETH, SOL"
  },
  "limit": {
   "type": "integer",
   "maximum": 50,
   "minimum": 1,
   "description": "Max headlines to return (default 10)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "cryptonews",
  "result": {
   "asset": "BTC",
   "count": 2,
   "sources": [
    "CryptoPanic",
    "CoinDesk",
    "CoinTelegraph",
    "Decrypt",
    "BitcoinMagazine"
   ],
   "headlines": [
    {
     "ts": "2026-07-08T09:12:00+00:00",
     "url": "https://www.coindesk.com/example",
     "score": 2.31,
     "title": "Bitcoin surges past resistance as ETF inflows hit record",
     "source": "CoinDesk",
     "sentiment": "very_bullish"
    },
    {
     "ts": "2026-07-08T08:40:00+00:00",
     "url": "https://cointelegraph.com/example",
     "score": 1.08,
     "title": "Analysts warn of BTC pullback risk near key level",
     "source": "CoinTelegraph",
     "sentiment": "bearish"
    }
   ],
   "generated_at": "2026-07-08T09:15:00+00:00",
   "sentiment_score": 0.42,
   "overall_sentiment": "bullish"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-news-headlines-with-sentiment-api-35f9f064/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cryptonews.hergertsynthora.com](https://www.zero.xyz/host/cryptonews.hergertsynthora.com/llms.txt)