# Carbon Cashmere Single-Coin ML Trading Signal (V3 tsfresh)

> Carbon Cashmere Single-Coin ML Trading Signal (V3 tsfresh) is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns a detailed V3 tsfresh ML trading signal for a single cryptocurrency, including variant comparison (A/B/C), regime context, key derivatives data, and a 30-day backtest track record.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/signal-feed/:coin
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-carbon-cashmere-de-7d013633
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wZ22tp2m_wAn2ctx-n8nF

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-7d013633
```

Example prompt: What's the latest V3 tsfresh ML trading signal for Ethereum — including the A/B/C model variant comparison, current market regime, derivatives data, and 30-day backtest track record?

## When to prefer this

Use this endpoint when you need a deep, single-asset ML trading signal with full model transparency — specifically the V3 tsfresh architecture with A/B/C variant comparison, regime context, and backtest history. Prefer this over the ensemble signal endpoint when model interpretability and variant-level comparison matter, or when you want to audit the 30-day track record for a specific coin.

## Known failure modes

- Unsupported coin symbol returns 404 or empty result
- Stale or unavailable market data may delay signal freshness
- Payment failure via x402 protocol blocks access
- Model inference error returns 500 with error message
- Invalid coin identifier format returns 400 bad request

## How this service works

Single coin detailed ML trading signal — V3 tsfresh model output with variant comparison (A/B/C), regime context, key derivatives data, and 30-day backtest track record. AI agent API for single-asset trading decisions, signal deep-dive, and model transparency.

## Output

Returns a structured JSON object containing the V3 tsfresh model's trading signal for the requested coin, with model variant outputs (A, B, C), current regime classification, key derivatives data, and a 30-day backtest performance summary for evaluating model reliability.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-carbon-cashmere-de-7d013633/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)