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FastPath API - Bitcoin Fee Ladder
x402
FastPath API - Bitcoin Fee Ladder is a paid API for AI agents from api.nativebtc.org, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Returns a tiered fee ladder (cheap/normal/urgent) with sat/vbyte estimates and block targets from Core v31 optimizer cache
Price / call$0.01
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
A JSON object containing a fee ladder with three tiers: cheap (sat/vbyte and block target), normal (sat/vbyte and block target), and urgent (sat/vbyte and block target), along with the data source label and a success flag.
Example use cases
Example prompt
“What are the current Bitcoin fee tiers — cheap, normal, and urgent — in sat/vbyte from the Core v31 optimizer cache, targeting 6 blocks for normal confirmation?”
Technical details
Endpoint
POSThttps://api.nativebtc.org/v1/template/fee-ladderWhen to prefer
Use this endpoint when you need a structured multi-tier Bitcoin fee recommendation (cheap/normal/urgent) derived from Bitcoin Core v31's optimizer cache, especially when building wallets, transaction fee selectors, or dashboards that need tiered fee guidance rather than a single point estimate.
Side effects
- Invalid targetBlocks value (below minimum of 1) returns validation error
- Core v31 optimizer cache unavailable returns error or stale data
- Payment failure via x402 returns 402 Payment Required
- Network timeout returns 5xx server error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| targetBlocks | number | Desired confirmation target in blocks. |
Output
Schema · Response
{
"type": "json",
"example": {
"ladder": {
"cheap": {
"satVb": 1,
"targetBlocks": 144
},
"normal": {
"satVb": 1,
"targetBlocks": 6
},
"urgent": {
"satVb": 2,
"targetBlocks": 1
}
},
"source": "core_v31_optimizer_cache",
"success": true
}
}Tags
x402
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