# Carbon Cashmere Crypto Dispersion Metrics

> Carbon Cashmere Crypto Dispersion Metrics is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.01/call, status down (last checked 2026-09-14).

Returns cross-sectional dispersion and breadth metrics for the crypto market, including volatility, correlation clusters, diffusion indexes, and advance-decline statistics across coins over 7d/30d/90d periods.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/dispersion
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-carbon-cashmere-de-207be82b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Lm3LkVM_6I3NXDEYW5m4h

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-207be82b
```

Example prompt: Can you pull the crypto market dispersion metrics for the last 30 days — I want to see the cross-sectional volatility, how coins cluster by correlation, and what the diffusion index looks like for 7-day and 30-day returns?

## When to prefer this

Use this endpoint when you need market-wide breadth and dispersion analytics across many cryptocurrencies simultaneously — not individual coin data. Ideal for assessing whether a market move is broad-based or concentrated, studying correlation regime shifts, or measuring overall crypto market health over 7d/30d/90d horizons. Prefer this over individual coin price endpoints when the research question involves cross-sectional statistics.

## Known failure modes

- Invalid or unsupported period parameter returns an error
- Service unavailable if underlying price data feed is stale or offline
- Rate limiting or payment failure returns 402 if x402 payment is not processed
- Empty or malformed response if coin universe data is temporarily unavailable

## How this service works

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

## Output

Returns a JSON object with: cross_sectional_vol (average std of returns across coins per timestamp), correlation_clusters array (2-5 hierarchical groups with avg intra-cluster correlation), diffusion_index_7d and diffusion_index_30d (percentage of coins with positive returns over those windows), advance-decline ratio, new highs/lows percentages, plus _meta, period, and universe fields. Covers 7d, 30d, or 90d periods.

## 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."
  },
  "period": "30d",
  "universe": "core",
  "breadth_signals": {
   "new_lows_pct_30d": 0.09,
   "new_highs_pct_30d": 0.18,
   "advance_decline_ratio_7d": 1.42
  },
  "diffusion_index_7d": 0.61,
  "cross_sectional_vol": 0.024,
  "diffusion_index_30d": 0.42,
  "correlation_clusters": [
   {
    "id": 1,
    "members": [
     "BTC",
     "ETH",
     "SOL"
    ],
    "avg_intra_corr": 0.82
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-carbon-cashmere-de-207be82b/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)