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Bitcoin Recommended Fee Rates API
x402
Bitcoin Recommended Fee Rates API is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Returns current Bitcoin recommended fee rates in sat/vB across five priority tiers (fastest, half-hour, hour, economy, minimum) sourced from mempool.space
Price / call$0.005
Success—
StatusUnknown
How this service works
Bitcoin recommended fee rates (sat/vB) for fast/half-hour/hour/economy/minimum via mempool.space. Use no params. Built for AI agents constructing BTC transactions, fee estimation UIs. Accepts payment on Base or Solana — either network works.
Output
Returns five fee rate tiers in sat/vB: fastest (next block), half-hour confirmation, one-hour confirmation, economy, and minimum. Values are sourced live from mempool.space and reflect current mempool conditions.
Example use cases
Example prompt
“What are the current Bitcoin fee rates — I need the sat/vB recommendations for fast, half-hour, hour, economy, and minimum priority so I can pick the right one for my transaction.”
Technical details
Endpoint
GEThttps://api.x402node.dev/chain/btc-feesWhen to prefer
Use this endpoint when an AI agent or application needs current Bitcoin fee rate recommendations without requiring a mempool.space API key. Ideal for transaction construction workflows, fee estimation UIs, or wallet tooling that needs all five priority tiers in a single call. Prefer over direct mempool.space calls when operating in an x402 micropayment environment or when a no-auth, pay-per-call model is preferred.
Side effects
- mempool.space upstream unavailable — proxy may return 502 or error JSON
- Stale data if mempool.space cache is lagged during high-traffic periods
- Payment failure (x402 protocol) if USDC balance is insufficient — returns 402
- No parameters accepted; passing a body may be ignored or cause unexpected behavior
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Tags
x402
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