# Carbon Cashmere Whale Flow On-Chain Analytics

> Carbon Cashmere Whale Flow On-Chain Analytics 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 24 snapshots of whale wallet activity and on-chain flow metrics for BTC or Solana, including tracked smart-money wallets, exchange inflows/outflows, mempool fees, and block data.

## Facts

- Endpoint: GET https://api.carbon-cashmere.de/v1/whale-flow/:var1
- 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/api-carbon-cashmere-de-25377ab4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_v_6AchPDNpfjdAByRK_xB

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-25377ab4
```

Example prompt: Pull the latest 24 whale-flow snapshots for Solana — I want to see what Wintermute, Kraken and other tracked wallets have been moving, including exchange inflows and outflows and the largest transactions.

## When to prefer this

Use this endpoint when you need smart-money whale wallet tracking with exchange inflow/outflow context for Solana or Bitcoin. It is uniquely valuable because it tracks named institutional wallets (Wintermute, Kraken) on Solana and provides BTC mempool fee and congestion data alongside hashrate — all in one structured time-series response. Prefer this over generic price APIs when on-chain flow signals are needed for trading intelligence or alert systems.

## Known failure modes

- Invalid chain param (only 'btc' and 'sol' accepted despite schema showing 'kas') returns 400 or empty result
- No data available for a snapshot window returns empty snapshots array
- Payment not processed (x402 protocol) returns 402 Payment Required
- Rate limiting or server error returns 5xx
- Stale data if node or data pipeline is lagging

## How this service works

Get whale movement data — Solana: 12 tracked whale wallets (Wintermute, Kraken, etc.) with SOL moved, exchange inflow/outflow, and largest transactions. BTC: mempool fee trends, congestion levels, hashrate, and block data. Last 24 snapshots. AI agent API for smart money tracking, whale alert monitoring, and on-chain flow analysis.

## Output

Returns a JSON object with a chain identifier, a summary object, and an array of up to 24 time-ordered snapshots. For Solana: SOL moved per tracked whale wallet (Wintermute, Kraken, etc.), exchange inflow/outflow volumes, and largest individual transactions. For BTC: mempool fee trends, congestion level, hashrate, and block data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "coin"
 ],
 "properties": {
  "coin": {
   "type": "string",
   "title": "Coin"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-carbon-cashmere-de-25377ab4/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)