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Bitcoin Transaction Fee Estimator (mempool.space)
x402
Bitcoin Transaction Fee Estimator (mempool.space) is a paid API for AI agents from finance-api.kdlcfa.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns recommended Bitcoin transaction fee rates (sat/vB) by confirmation speed, sourced from mempool.space
Price / call$0.01
Success—
StatusUnknown
How this service works
Recommended Bitcoin transaction fee rates by confirmation speed, via mempool.space API
Output
An object containing recommended Bitcoin fee rates in sat/vB for different confirmation speed tiers: fastest (next block), half-hour, one-hour, economy, and minimum fee. Sourced in real-time from the mempool.space API.
Example use cases
Urgent BTC payment fee check
“I need to send Bitcoin urgently — what fee rate should I use to get it confirmed in the next block?”
Economy fee for non-urgent transfer
“I'm sending some Bitcoin but I'm not in a rush — what's the cheapest fee rate I can use and still get confirmed within an hour?”
Fee monitoring for wallet app
“What are the current Bitcoin mempool fee estimates for fastest, half-hour, and one-hour confirmation speeds?”
Technical details
Endpoint
GEThttps://finance-api.kdlcfa.workers.dev/btc-fee-estimateWhen to prefer
Use this endpoint when you need current, real-world Bitcoin fee recommendations broken down by confirmation urgency, especially when building wallets, payment tools, or fee-optimization agents. Prefer over static fee tables or exchange-provided estimates because it reflects live mempool conditions via mempool.space.
Side effects
- mempool.space API unavailable or rate-limited — upstream error returned
- Network timeout if Bitcoin mempool data is temporarily inaccessible
- Payment required error (402) if USDC payment header is missing or invalid
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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