# Carbon & Cashmere News Reaction Time API – SOL

> Carbon & Cashmere News Reaction Time API – SOL is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.05/call, status down (last checked 2026-09-14).

Returns statistical analysis of how quickly SOL's price reacts to news events, including reaction rates, time-to-move distributions, and recent news-price samples.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/news-reaction-time/SOL
- Price: $0.05/call
- Payment: x402
- Status: down
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/carbon-cashmere-news-reaction-time-api-sol-cdf83fe9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OCln5ZiONgZVCNCE0pszx

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 carbon-cashmere-news-reaction-time-api-sol-cdf83fe9
```

Example prompt: How fast does SOL's price typically react to news — can you pull the news reaction time stats from Carbon & Cashmere, looking back 14 days with a 6-hour time window and a 0.5% move threshold?

## When to prefer this

Use this endpoint when you need to quantify how quickly and reliably crypto news drives price movement for SOL specifically — ideal for building news-driven trading signals, event-driven strategy backtesting, or assessing the alpha window after a news event. Prefer this over generic price APIs when the research question is about news-to-price latency rather than current price alone.

## Known failure modes

- Invalid or unsupported coin symbol returns 404 or empty result
- Lookback window too large may return sparse or no data
- API payment not satisfied (x402 payment required) returns 402
- Rate limiting or infrastructure issues return 5xx
- Filter combination (e.g. very high min_impact + narrow time window) yields zero matching events

## How this service works

Professional crypto market intelligence. Real-time prices, signals, and market scoring.

## Output

A JSON object containing: the coin ticker (SOL), aggregate stats (total news count, reaction rate, seconds-to-move distribution with min/max/median/p25/p75, number of events reacted within window), the active filter parameters (sentiment, min impact, lookback days, time window, move threshold), and an array of recent individual news-to-price-move samples with timestamp, headline, source, sentiment, impact level, price at news, first move percent, and seconds to move.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "coin": "BTC",
  "stats": {
   "news_total": 412,
   "reaction_rate": 0.696,
   "seconds_to_move": {
    "max": 21540,
    "min": 60,
    "p25": 720,
    "p75": 5400,
    "median": 1842
   },
   "reacted_within_window": 287
  },
  "filter": {
   "sentiment": null,
   "min_impact": null,
   "lookback_days": 14,
   "time_window_hours": 6,
   "move_threshold_pct": 0.005
  },
  "recent_samples": [
   {
    "ts": "2026-05-09T14:32:00Z",
    "title": "Bitcoin ETF inflows hit record",
    "source": "CoinDesk",
    "sentiment": "positive",
    "impact_level": "HIGH",
    "price_at_news": 79500,
    "first_move_pct": 0.00712,
    "seconds_to_move": 480
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-news-reaction-time-api-sol-cdf83fe9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.carbon-cashmere.de](https://www.zero.xyz/host/api.carbon-cashmere.de/llms.txt)