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Carbon & Cashmere BTC Whale Activity API
x402
Carbon & Cashmere BTC Whale Activity API is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Returns 24-hour Bitcoin whale transaction activity metrics including transaction counts, output volumes, fee rates, and 30-day trend z-score regime classification.
Price / call$0.05
Success—
StatusUnknown
How this service works
Professional crypto market intelligence. Real-time prices, signals, and market scoring.
Output
Returns a JSON object with: 24-hour whale tx count, tx-per-hour rate, average and median BTC output sizes, total output BTC sum, largest single transaction (txid, timestamp, output BTC), average vbyte size, average fee rate in sat/vb, and a 30-day trend block containing z-score, regime label (e.g. 'neutral_activity'), current vs baseline tx-per-hour, plus metadata indicating the data source (local Bitcoin Core node).
Example use cases
Detect unusual whale movement today
“Are Bitcoin whales doing anything unusual right now? Pull the latest 24-hour transaction metrics and tell me if the z-score is flagging anything out of the ordinary compared to the 30-day baseline.”
Compare whale activity to historical baseline
“How does today's Bitcoin whale activity stack up against the 30-day baseline — are large wallets moving more or less than usual, and what regime are we in right now?”
Check large BTC transaction fee rates
“What are whales paying in fees for large Bitcoin transactions right now, and how many of these big moves happened in the last 24 hours? I want to know if on-chain activity is heating up.”
Technical details
Endpoint
GEThttps://api.carbon-cashmere.de/v1/btc/whale-activityWhen to prefer
Choose this endpoint when you need real-time, node-sourced Bitcoin whale transaction activity with statistical trend context (z-score, regime classification) rather than just raw price data. Prefer over generic price APIs when the user wants on-chain large-wallet movement signals, activity regime detection, or fee rate intelligence directly from a Bitcoin Core node.
Side effects
- Bitcoin Core node sync lag may cause stale data during network disruptions
- Malformed or missing query parameters may return a 400 error
- Payment not processed or invalid x402 header results in 402 Payment Required
- Node connectivity issues may result in 503 Service Unavailable
- The total_output_btc_sum includes change outputs and is NOT net value transferred — misinterpretation is a semantic failure mode
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"fees": {
"avg_fee_rate_sat_vb": 4.22
},
"_meta": {
"source": "btc_zmq_whale_txs (local Bitcoin Core node)"
},
"activity": {
"tx_count": 5851,
"largest_tx": {
"ts": "2026-04-25T12:15:36+00:00",
"txid": "abc123...",
"output_btc": 20215.24
},
"avg_size_vb": 650,
"tx_per_hour": 243.79,
"avg_output_btc": 104.89,
"avg_output_count": 9,
"median_output_btc": 22.31,
"total_output_btc_sum": 613709.46
},
"trend_30d": {
"_meta": "z-score on tx-count (activity proxy), NOT BTC-value-transferred",
"regime": "neutral_activity",
"z_score_30d": -0.272,
"current_tx_per_hour": 243.79,
"baseline_tx_per_hour": 261.66
},
"_disclaimer": "total_output_btc_sum includes change-outputs. NOT net value transferred. Activity indicator only.",
"window_hours": 24,
"min_output_btc_threshold": 10
}
}Tags
x402
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