# Carbon & Cashmere Funding Rate History – ETH

> Carbon & Cashmere Funding Rate History – ETH 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 historical funding rate data for Ethereum (ETH), including statistical summaries and time-series samples over a configurable lookback window.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/history/funding/ETH
- 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-funding-rate-history-eth-e004a2be
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SoCPEZqIV9PUs7w1T_M6Y

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-funding-rate-history-eth-e004a2be
```

Example prompt: Pull the last 30 days of ETH funding rate history for me — I want to see the average, max, min, and current rate, plus the full 8-hour interval time series so I can gauge whether longs have been paying shorts recently.

## When to prefer this

Use this endpoint when you need detailed historical funding rate data specifically for ETH perpetual futures, including statistical aggregates and a granular time series. Prefer this over generic market data APIs when you need funding rate analytics (not just price), and when you need annualized rate context alongside raw 8-hour interval data.

## Known failure modes

- Invalid or unsupported symbol returns an error response
- Insufficient lookback period or missing days parameter returns default or error
- Payment not included or insufficient USDC balance results in 402 Payment Required
- Rate limiting if too many calls in quick succession
- Stale data if upstream exchange feed is delayed

## How this service works

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

## Output

A JSON object containing a summary stats block (sample count, average rate, max rate, min rate, current rate) and a time-series array of funding rate observations with timestamps, raw rates, and annualized percentages for each 8-hour interval over the requested lookback window.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "days": 30,
  "stats": {
   "samples": 90,
   "avg_rate": 0.00008,
   "max_rate": 0.0003,
   "min_rate": -0.0002,
   "current_rate": 0.0001
  },
  "series": [
   {
    "ts": "2026-04-01T00:00:00Z",
    "rate": 0.0001,
    "annualized_pct": 10.95
   }
  ],
  "symbol": "BTCUSDT",
  "interval": "8h"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-funding-rate-history-eth-e004a2be/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)