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BTC Transaction Fee Rates
x402
BTC Transaction Fee Rates is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Returns recommended Bitcoin transaction fee-rates in sat/vByte across five confirmation horizons plus a live mempool congestion snapshot with block backlog estimate.
Price / call$0.005
Success—
StatusUnknown
How this service works
Recommended Bitcoin transaction fee-rates in sat per vByte across five confirmation horizons (fastest, half hour, hour, economy, minimum) plus a live mempool congestion snapshot with an estimated block backlog. Informational, not advice.
Output
A structured response containing five fee-rate tiers in sat/vByte (fastest, half-hour, hour, economy, minimum) and a live mempool snapshot including a congestion indicator and estimated number of blocks currently backed up.
Example use cases
Optimizing BTC withdrawal fee
“I'm about to send Bitcoin from my wallet — what fee rate should I set in sat/vByte if I want it confirmed within the next 30 minutes, and how backed up is the mempool right now?”
Cheapest BTC fee for non-urgent transfer
“I want to send some Bitcoin but I'm not in a rush — what's the current minimum or economy fee rate in sat/vByte that will still eventually get confirmed?”
Monitoring mempool congestion for a trading bot
“Check the current Bitcoin mempool congestion level and tell me the estimated block backlog along with the fastest and economy fee rates right now.”
Technical details
Endpoint
GEThttps://payai.agentstools.dev/btc/feesWhen to prefer
Choose this endpoint when you need real-time Bitcoin fee-rate recommendations across multiple confirmation horizons in a single call, especially when also needing mempool congestion context. Prefer this over manual mempool explorers when automating Bitcoin transaction preparation or wallet UX decisions.
Side effects
- Upstream mempool data source unavailable, returning stale or error response
- Network timeout if Bitcoin node or mempool API is unreachable
- Payment required error (402) if x402 payment header is missing or invalid
- Unexpected fee spike during high mempool activity may look like data errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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