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FastPath Bitcoin Mempool Fee Estimator
x402
FastPath Bitcoin Mempool Fee Estimator is a paid API for AI agents from api.nativebtc.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns recommended Bitcoin fee rates (sat/vB) and fee histogram data for a specified confirmation target window
Price / call$0.001
Success—
StatusUnknown
How this service works
FastPath translates Ethereum-style JSON-RPC requests into Bitcoin data, fee intelligence, mempool insight, and Core v31 package signals. Paid by x402.
Output
Returns a JSON object with the recommended fee rate in satoshis per vByte for the requested confirmation target, a success flag, the target block count, and a histogram array showing transaction volume bucketed by fee range.
Example use cases
Example prompt
“What fee rate in sat/vB should I use to get my Bitcoin transaction confirmed within 10 blocks, and can you show me the mempool fee histogram?”
Technical details
Endpoint
GEThttps://api.nativebtc.org/v1/mempool/feesWhen to prefer
Use this endpoint when you need to estimate Bitcoin transaction fees based on current mempool conditions, especially when you want both a specific recommended sat/vB rate and a histogram of fee distribution. Prefer this over generic fee APIs when you need Core v31-aligned fee intelligence with Ethereum-style JSON-RPC compatibility.
Side effects
- Invalid target parameter (below minimum of 1 block) returns validation error
- Network unavailable or mempool data stale returns error response
- Payment not processed via x402 protocol results in 402 Payment Required
- Target confirmation window too large may return no data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"target": 10,
"success": true,
"histogram": [
{
"txs": 12000,
"bucket": "1-2"
}
],
"recommendedSatVb": 1
}
}Tags
x402
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