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Bitcoin Whale Transaction Tracker
x402
Bitcoin Whale Transaction Tracker is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.05/call, status down (last checked 2026-09-15).
Tracks large Bitcoin transactions (whales) from a live full-node ZMQ stream, returning BTC/USD values, fee rates, size, ancestry, RBF flags, and confirmation status with sub-second freshness
Price / call$0.05
Success—
StatusDown
How this service works
Professional crypto market intelligence. Real-time prices, signals, and market scoring.
Output
A list of large Bitcoin transactions matching the threshold filter, each with txid, BTC and USD value, fee rate (sat/vB), transaction size in bytes, ancestor and descendant counts, BIP125 RBF flag, and confirmation status — plus an aggregate summary (count, total BTC, total USD) across all matched transactions. Data is sourced from a live Bitcoin Core full node via ZMQ with sub-second freshness.
Example use cases
Example prompt
“Show me all Bitcoin whale transactions above 50 BTC from the last 24 hours — I want to see their USD value, fee rate, size, whether they're RBF-flagged, and a summary of what's going on.”
Technical details
Endpoint
GEThttps://api.carbon-cashmere.de/v1/bitcoin/whalesWhen to prefer
Choose this endpoint when you need near-real-time Bitcoin whale transaction data with rich per-transaction metadata (fee rates, RBF, ancestors/descendants) sourced directly from a full node rather than a third-party aggregator. Ideal for on-chain research, mempool monitoring, or detecting large BTC movements with configurable size thresholds and lookback windows up to 168 hours.
Side effects
- Threshold too high returns empty transaction list
- Lookback window exceeding 168h returns error or is clamped
- Node sync lag during network stress may delay freshest mempool entries
- Invalid parameter types (non-numeric threshold) return 400 bad request
- Payment not included or insufficient USDC returns 402 payment required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"_meta": {
"source": "btc_core_node_zmq_whale_stream",
"disclaimer": "Informational research data only — not investment advice."
},
"query": {
"hours": 24,
"limit": 50,
"min_btc": 100
},
"whales": [
{
"txid": "abc123...def89012",
"confirmed": true,
"total_btc": 1250.5,
"total_usd": 98523100,
"bip125_rbf": false,
"fee_rate_satvb": 28.5
}
],
"summary": {
"count": 42,
"total_btc": 18754.2,
"total_usd": 1478234567.8,
"confirmed_pct": 0.833,
"rbf_flagged_count": 7,
"avg_whales_per_hour": 1.75
}
}
}Tags
x402
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