# Carbon Cashmere Historical Crypto Intelligence API

> Carbon Cashmere Historical Crypto Intelligence API is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.01/call, status down (last checked 2026-09-14).

Returns up to 730 days of historical OHLCV 4h candles, funding rates, open interest, and ML signals for 34 supported cryptocurrencies with configurable lookback and include filters.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/intel/history/:coin
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-carbon-cashmere-de-1422eebf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AEdZ4aXhgYin62GOV3Li0

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 api-carbon-cashmere-de-1422eebf
```

Example prompt: Pull 720 hours of historical intelligence data for ETH from Carbon Cashmere — I need the 4h OHLCV candles, funding rates, open interest, and ML signals so I can backtest a trend-following strategy.

## When to prefer this

Use this endpoint when you need multi-dimensional historical crypto data in a single call — specifically when you want 4h OHLCV candles combined with funding rates, open interest, and pre-computed ML signals for backtesting or pattern detection. Prefer this over generic price APIs when ML signal history is required or when doing quantitative analysis across up to 730 days of data for any of the 34 supported coins.

## Known failure modes

- Unsupported coin ticker returns 400 or 404 — only 34 specific coins are supported
- Lookback parameter out of range (>720h or <1h) may return validation error
- Payment failure via x402 protocol returns 402 Payment Required
- Rate limiting or quota exceeded returns 429
- Coin with insufficient historical data may return partial results or empty arrays

## How this service works

Historical intelligence data — OHLCV 4h candles, funding rates, open interest, and ML signals with configurable lookback (1-720h) and include filters. 730 days of data for 34 coins. AI agent API for backtesting, trend analysis, and historical pattern detection.

## Output

A JSON object containing the requested coin's historical data arrays: OHLCV 4h candles (open, high, low, close, volume), funding rates, open interest values, and ML model signals — covering up to 730 days of history depending on the configured lookback window.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-carbon-cashmere-de-1422eebf/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)