# Carbon & Cashmere Vol Regime API – SOL

> Carbon & Cashmere Vol Regime API – SOL 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 the current volatility regime classification and transition probabilities for Solana (SOL), including annualized volatility and autocorrelation clustering metrics.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/vol-regime/SOL
- 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/carbon-cashmere-vol-regime-api-sol-31fa57ef
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_skl_O01as2oI6tmZex2Ja

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-vol-regime-api-sol-31fa57ef
```

Example prompt: What's the current volatility regime for SOL — is it normal, expanded, or compressed — and what are the probabilities it transitions to each state next?

## When to prefer this

Use this endpoint when you need a structured, quantitative classification of Solana's current volatility environment — specifically the Hidden Markov Model (HMM)-style regime label, transition probabilities, and ACF clustering data. Prefer this over general price feeds when your agent needs to reason about market risk state, mean-reversion feasibility, or volatility-conditioned strategy selection for SOL.

## Known failure modes

- Invalid or unsupported symbol returns an error or empty response
- Service unavailable if API is down or overloaded
- Payment failure if x402 USDC payment of $0.01 is not completed
- Rate limiting if too many requests are made in a short window

## How this service works

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

## Output

A JSON object containing: the current volatility regime label (e.g. 'normal', 'expanded', 'compressed'), next-state transition probabilities for each regime, an array of volatility clustering autocorrelation (ACF) values, annualized current volatility as a decimal, and a percentile rank of current vol versus the historical lookback window. Also includes a disclaimer noting the data is informational only.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "_meta": {
   "disclaimer": "Informational research data only — not investment advice."
  },
  "symbol": "BTC",
  "current_regime": "normal",
  "next_state_probs": {
   "normal": 0.65,
   "expanded": 0.17,
   "compressed": 0.18
  },
  "vol_clustering_acf": [
   0.34,
   0.21,
   0.15,
   0.11,
   0.08
  ],
  "current_vol_annualized": 0.38,
  "percentile_vs_lookback": 0.45
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/carbon-cashmere-vol-regime-api-sol-31fa57ef/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)