# Bitcoin Coin Days Destroyed (Proxy) – Hourly Signal

> Bitcoin Coin Days Destroyed (Proxy) – Hourly Signal is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Returns an hourly proxy metric for Bitcoin Coin Days Destroyed, computed as consolidation_ratio × fee_weight × volume plus whale transaction contribution, suitable for trend signal analysis.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/btc-derivatives/coin-days-destroyed
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-carbon-cashmere-de-feafe12c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_d2LX7I0QEnkQrFFzJG58H

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-feafe12c
```

Example prompt: Pull the latest hourly Bitcoin Coin Days Destroyed proxy from Carbon Cashmere — I want to see the current consolidation ratio, fee weight, volume factor, and whale transaction contribution to gauge whether long-dormant BTC is moving.

## When to prefer this

Use this endpoint when you need a fast, lightweight hourly trend signal for Bitcoin holder behavior and dormancy — particularly when combining consolidation, fee, volume, and whale-tx signals into a single CDD proxy. Not suitable when precise absolute coin-age accounting (true Coin Days Destroyed) is required.

## Known failure modes

- Stale or missing data if upstream BTC mempool/blockchain data feed is unavailable
- Truncated response for very large payloads (original size ~31KB)
- Methodology divergence from true CDD — proxy values may misrepresent absolute coin age
- HTTP 429 rate limit if call quota exceeded
- HTTP 402 payment required if x402 payment not provided or insufficient USDC balance

## How this service works

Hourly Bitcoin Coin Days Destroyed proxy (consolidation_ratio × fee_weight × volume) + whale-tx contribution. ⚠️ PROXY methodology — suitable for trend signals, not absolute reserve-coin-age accounting.

## Output

Returns a JSON payload (up to ~31KB) containing the hourly BTC Coin Days Destroyed proxy value broken down by its components: consolidation_ratio, fee_weight, volume, and whale transaction contribution, along with a timestamp. Suitable for trend analysis but not precise reserve-coin-age accounting.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "hourly": [
   {
    "hour": "...",
    "cdd_proxy": 12477.4,
    "whale_volume_btc": 312.1
   }
  ],
  "method": "block_stats_proxy + whale_volume",
  "window": "7d",
  "summary": {
   "total_cdd_proxy": 1492388
  },
  "disclaimer": "Proxy methodology"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-carbon-cashmere-de-feafe12c/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)