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Bitcoin Fee Estimate
x402
Bitcoin Fee Estimate is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).
Returns current Bitcoin network fee estimates (fastest, half-hour, economy, and minimum) in satoshis per byte
Price / call$0.002
Success—
StatusUnknown
How this service works
Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.
Output
A JSON object with five fee tiers in satoshis per byte: fastestFee (next block), halfHourFee (within ~30 min), hourFee (within ~60 min), economyFee (low priority), and minimumFee (absolute minimum accepted by the network).
Example use cases
Optimize BTC withdrawal fee
“I'm about to send Bitcoin from my exchange — what fee should I use to get confirmed in the next block versus waiting an hour to save money?”
Monitor fee spike before sending
“Check what the current Bitcoin network fees are before I initiate a large BTC transfer — I want to know if it's a good time or if fees are unusually high right now.”
Automate fee-aware BTC transaction
“Before broadcasting my Bitcoin transaction, look up the current recommended fees so I can automatically set the right sat/byte rate for confirmation within 30 minutes.”
Technical details
Endpoint
GEThttps://anibalb.duckdns.org/x402/btc-fee-estimate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time Bitcoin fee estimates without managing API keys or accounts. Ideal for agents that need to programmatically set transaction fees, monitor fee spikes, or trigger fee-aware logic. Pay-per-call at $0.002 USDC makes it cost-effective for occasional lookups without subscriptions.
Side effects
- Upstream Bitcoin fee data source is unavailable — returns 5xx error
- Payment via x402 fails due to insufficient USDC balance — returns 402
- Network timeout if Bitcoin mempool data feed is slow
- Stale fee data if the underlying provider hasn't updated recently
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"hourFee": 1,
"economyFee": 1,
"fastestFee": 1,
"minimumFee": 1,
"halfHourFee": 1
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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