# Carbon & Cashmere Signal API – BTC Historical OHLCV & Funding

> Carbon & Cashmere Signal API – BTC Historical OHLCV & Funding is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.02/call, status down (last checked 2026-09-13).

Returns historical OHLCV candlestick data and funding rates for Bitcoin at a specified interval

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/intel/history/BTC
- Price: $0.02/call
- Payment: x402
- Status: down
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/carbon-cashmere-signal-api-btc-historical-ohlcv-funding-b9f83325
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eQqmPnx4lelACuCiycEjm

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-historical-ohlcv-funding-b9f83325
```

Example prompt: Pull the historical 4-hour OHLCV candles and funding rates for BTC from the Carbon & Cashmere Signal API so I can see recent price action and whether funding has been positive or negative.

## When to prefer this

Use this endpoint when you need historical candlestick (OHLCV) data and funding rates specifically for BTC, especially if you also plan to use other Carbon & Cashmere endpoints (signals, ML ensemble, mean-reversion analytics) for a unified crypto intelligence workflow. Prefer this over generic market data APIs when you need funding rate history bundled with price data in a single call.

## Known failure modes

- Unsupported coin symbol returns 404 or empty result
- Invalid interval parameter returns 400 bad request
- Payment not processed (x402 protocol failure) returns 402
- Rate limiting or quota exceeded returns 429
- Service downtime returns 503

## How this service works

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

## Output

A JSON object containing the coin symbol (BTC), an array of OHLCV candles (open, high, low, close, volume, timestamp) at the requested interval, and an array of funding rate entries (rate, timestamp), plus the interval label.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "coin": "BTC",
  "ohlcv": [
   {
    "c": 84800,
    "h": 85200,
    "l": 84100,
    "o": 84500,
    "v": 12500,
    "ts": "2026-04-13T00:00:00"
   }
  ],
  "funding": [
   {
    "ts": "2026-04-13T00:00:00",
    "rate": 0.0001
   }
  ],
  "interval": "4h"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-signal-api-btc-historical-ohlcv-funding-b9f83325/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)