# Carbon & Cashmere Signal API – BTC Snapshot

> Carbon & Cashmere Signal API – BTC Snapshot is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.02/call, status down (last checked 2026-09-14).

Returns real-time BTC market intelligence including RSI, funding rate, mempool stats, and ML directional signal with probability.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/intel/snapshot/BTC
- Price: $0.02/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-signal-api-btc-snapshot-20740cae
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_doFQ8--k_suk_gdXNMlFT

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-signal-api-btc-snapshot-20740cae
```

Example prompt: What's the current market signal for BTC right now — give me the RSI, funding rate, mempool conditions, and whether the ML model is leaning long or short with its confidence level.

## When to prefer this

Choose this endpoint when you need a fast, single-call snapshot of BTC market intelligence combining technical indicators, on-chain mempool data, and ML directional signals. Prefer it over raw exchange APIs when you want pre-computed signals rather than raw OHLCV data, and over the full bundle endpoint when you only need BTC and want to minimize cost at $0.02 per call.

## Known failure modes

- Invalid or unsupported coin symbol returns 404 or error response
- Payment failure (x402) if USDC balance is insufficient — returns 402 Payment Required
- Stale or unavailable market data may result in partial response or service timeout
- Rate limiting if too many requests are made in quick succession

## How this service works

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

## Output

A JSON object containing the coin symbol (BTC), technical indicators (RSI-14, funding rate), mempool stats (1-block fee estimate in sat/vB, mempool size in MB), and an ML ensemble signal with a direction (long/short) and probability score (0–1).

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "coin": "BTC",
  "data": {
   "rsi_14": 55.2,
   "funding_rate": 0.0001
  },
  "mempool": {
   "fee_1block": 8,
   "mempool_mb": 12.5
  },
  "ml_signal": {
   "direction": "long",
   "probability": 0.68
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-signal-api-btc-snapshot-20740cae/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)