# Carbon & Cashmere Funding Rate History API – SOL

> Carbon & Cashmere Funding Rate History API – SOL 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 funding rate time-series and statistics for Solana (SOL) perpetual futures, including average, max, min, current rates, and annualized percentage.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/history/funding/SOL
- 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-funding-rate-history-api-sol-6c387a6c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_l4pI9prj9yAsZoS8wAzTV

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-api-sol-6c387a6c
```

Example prompt: Pull the last 30 days of SOL perpetual funding rate history from Carbon & Cashmere — I want to see the average, max, min, current rate, and the full 8-hour interval time series with annualized percentages.

## When to prefer this

Use this endpoint when you need historical funding rate data specifically for SOL perpetual futures, including statistical summaries and time-series breakdowns. Prefer it over generic market data APIs when you need annualized funding rate calculations, mean statistics, or want to assess carry cost and market sentiment for SOL perps over a configurable lookback window.

## Known failure modes

- Symbol not supported or incorrectly specified — returns error or empty dataset
- Insufficient funding rate history available for the requested period
- Upstream exchange data unavailable — may return stale or partial data
- Payment not processed (x402 protocol failure) — request rejected before data is returned
- Rate limit exceeded — too many calls in a short window

## How this service works

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

## Output

Returns a JSON object containing: the number of days covered, aggregate statistics (sample count, average rate, max rate, min rate, current rate), and a time-series array with timestamps, per-period rates, and annualized percentage for each 8-hour interval — all specific to the SOL perpetual futures market.

## 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-api-sol-6c387a6c/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)