# Carbon & Cashmere ETH Chart Signal API

> Carbon & Cashmere ETH Chart Signal API is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.02/call, status down (last checked 2026-09-15).

Returns real-time price data, ML-driven trading signals, and market scoring for Ethereum (ETH) on a specified timeframe

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/chart/ETH
- Price: $0.02/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/carbon-cashmere-eth-chart-signal-api-e47900f6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Kw_KW0mqoKiVUeV1jStJv

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-eth-chart-signal-api-e47900f6
```

Example prompt: What are the current Carbon & Cashmere trading signals for ETH on the 4-hour timeframe — specifically the overall bias, trend strength, and support distance?

## When to prefer this

Choose this endpoint when you need real-time, ML-scored trading signals specifically for ETH including bias direction, trend strength, and support proximity. Prefer it over generic price feeds when you need proprietary Carbon & Cashmere signal features (cv_* metrics) rather than raw OHLCV data. Best for automated trading agents or market-monitoring workflows that need a single structured signal payload per coin per timeframe.

## Known failure modes

- Invalid or unsupported coin symbol returns an error
- Unsupported timeframe parameter may return empty or error response
- Payment not attached or insufficient USDC balance results in 402 Payment Required
- Service downtime or upstream data feed failure returns 5xx error
- Malformed request parameters return 400 Bad Request

## How this service works

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

## Output

A JSON object containing the coin identifier (e.g. 'ETH'), a timeframe label (e.g. '4h'), and a features object with numeric scores: cv_overall_bias (directional bias), cv_trend_strength (momentum magnitude), and cv_support_distance (proximity to nearest support level as a fractional value).

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "coin": "BTC",
  "features": {
   "cv_overall_bias": 0.3,
   "cv_trend_strength": 0.6,
   "cv_support_distance": -0.02
  },
  "timeframe": "4h"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-eth-chart-signal-api-e47900f6/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)