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Bitcoin Mempool Pressure Classifier
x402
Bitcoin Mempool Pressure Classifier is a paid API for AI agents from api.carbon-cashmere.de, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).
Returns Bitcoin mempool pressure level (low/medium/high/extreme), fee bucket distribution by sat/vB, RBF count/percentage, CPFP candidate count, and total tx count — updated every 5 minutes.
Price / call$0.02
Success—
StatusUnknown
How this service works
Bitcoin mempool pressure classification (low/medium/high/extreme) + fee buckets (0-1, 1-2, 2-5, 5-10, 10-20, 20-50, 50-100, 100-200, 200+ sat/vB) + RBF count + CPFP candidate count. Updated every 5 min.
Output
A JSON object with: pressure classification string (low/medium/high/extreme), total tx_count in mempool, mempool_mb (size in megabytes), rbf_count and rbf_pct (RBF transaction count and percentage), cpfp_candidates count, avg_ancestor_count, min_relay_fee_sat_vb, a fee_buckets_sat_vb object with counts across 9 fee ranges (0-1, 1-2, 2-5, 5-10, 10-20, 20-50, 50-100, 100-200, 200+ sat/vB), and a timestamp. Data is refreshed every 5 minutes.
Example use cases
Example prompt
“What's the current Bitcoin mempool pressure right now — is it low, medium, high, or extreme — and how are transactions distributed across the fee buckets like 1-2 sat/vB or 5-10 sat/vB?”
Technical details
Endpoint
GEThttps://api.carbon-cashmere.de/v1/btc-derivatives/mempool-pressureWhen to prefer
Use this endpoint when you need a quick, pre-classified mempool congestion signal plus fee-band distribution without running your own Bitcoin node. Ideal for agents deciding whether to broadcast a transaction now or wait, setting fee rates, or alerting users to congestion spikes. Prefer over raw mempool APIs when you need a human-readable pressure label and bucketed fee histogram in a single call.
Side effects
- Stale data if the 5-minute refresh cycle is delayed — ts field indicates data age
- Service unavailable (5xx) if the underlying Bitcoin node connection fails
- Rate limiting or payment failure if x402 payment is not correctly handled
- Empty or zero counts during periods of extremely low mempool activity
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
{
"ts": "2026-05-25T04:31:41.339823+00:00",
"rbf_pct": 72.8,
"pressure": "low",
"tx_count": 756,
"rbf_count": 348,
"mempool_mb": 0.24,
"cpfp_candidates": 240,
"avg_ancestor_count": 6.7,
"fee_buckets_sat_vb": {
"0_1": 4,
"1_2": 364,
"2_5": 98,
"5_10": 7,
"10_20": 4,
"20_50": 0,
"50_100": 1,
"100_200": 0,
"200_plus": 0
},
"min_relay_fee_sat_vb": 1
}Schema · Response
{
"type": "json",
"example": {
"rbf_pct": 4,
"pressure": "low",
"tx_count": 3075,
"rbf_count": 124,
"mempool_mb": 0.87,
"cpfp_candidates": 87,
"fee_buckets_sat_vb": {
"0_1": 1240,
"1_2": 880,
"2_5": 412
}
}
}Tags
x402
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