# Carbon & Cashmere BTC Trend Signal

> Carbon & Cashmere BTC Trend Signal is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns real-time BTC price, trend direction, ADX-14 strength score, support/resistance levels, and momentum metrics for Bitcoin.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/trend/BTC
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/carbon-cashmere-btc-trend-signal-b41bd8f6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iOSGEBauzrAUj29zY73KP

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-btc-trend-signal-b41bd8f6
```

Example prompt: What's the current BTC trend signal — is it going up or down, how strong is the move on the ADX scale, and how far is price from the 30-day support and resistance levels?

## When to prefer this

Choose this endpoint when you need a quick, structured BTC trend signal with both directional classification and quantitative momentum metrics (ADX, slope, support/resistance proximity) in a single call. Prefer it over raw exchange price feeds when you need pre-computed technical signals rather than just a spot price. Best suited for automated trading intelligence, alert systems, or portfolio monitoring workflows that need regime-aware context about Bitcoin's trend.

## Known failure modes

- Symbol not found or unsupported — endpoint is hardcoded to BTC path
- Payment not provided or invalid — x402 payment required at $0.01 USDC per call
- Service unavailable or upstream data delayed — stale or missing price data
- Rate limit exceeded — too many requests in a short window
- Malformed response if underlying data feed is disrupted

## How this service works

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

## Output

A JSON object containing the BTC symbol, current price, trend direction (up/down), ADX-14 strength classification (weak/moderate/strong/very_strong), 30-day support and resistance prices, percentage above support, percentage below resistance, slope percent per day, number of days in the current trend regime, and a disclaimer that it is informational only.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "_meta": {
   "disclaimer": "Informational research data only — not investment advice."
  },
  "adx_14": 28.4,
  "symbol": "BTC",
  "strength": "moderate",
  "direction": "up",
  "support_30d": 62000,
  "current_price": 68500,
  "resistance_30d": 74000,
  "pct_above_support": 10.48,
  "slope_pct_per_day": 0.42,
  "pct_below_resistance": 7.43,
  "duration_days_in_regime": 8.5
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-btc-trend-signal-b41bd8f6/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)