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Mempool API: Get Bitcoin fees

Gets current Bitcoin fee-rate recommendations, the estimated USD cost of a 140-vbyte transaction at each rate, and the Bitcoin price in USD. Confirmation times are estimates, not guarantees.

mempool.space (opens in a new tab)Version 1ReadNo sign-inVerified Nov 2, 2026

Unofficial. Not affiliated with or endorsed by Mempool.

Inputs

This method takes no input.

Output

From a run on Oct 23, 2026.
{  "reading_time": "2026-10-23T09:34:43Z",  "currency_code": "USD",  "economy_cost_usd": 0.1141392,  "minimum_cost_usd": 0.1141392,  "bitcoin_price_usd": 81528,  "one_hour_cost_usd": 0.1141392,  "next_block_cost_usd": 0.2282784,  "thirty_minutes_cost_usd": 0.1141392,  "economy_fee_sat_per_vbyte": 1,  "minimum_fee_sat_per_vbyte": 1,  "one_hour_fee_sat_per_vbyte": 1,  "next_block_fee_sat_per_vbyte": 2,  "thirty_minutes_fee_sat_per_vbyte": 1}
Price
1 credit per completed run (1¢ with pay as you go); failed runs are free.
Method
mempool.space/get_bitcoin_fees
Returns
fee rates in sat/vbyte, USD cost per rate, Bitcoin price in USD, reading time

Use it from your agent

Give your agent this line. It reads SKILL.md, gets a Fous API key and connects the Fous MCP server. Its run then takes the method mempool.space/get_bitcoin_fees; it needs no input.

Ask your agent

  • What's the current recommended bitcoin transaction fee in sat/vB right now?
  • How much would a typical 140 vbyte BTC transfer cost in dollars at the fastest fee rate?
  • Give me the current bitcoin price in USD along with the low, medium, and high fee estimates.
  • I want to send bitcoin soon, what fee rate should I pay for confirmation within roughly 30 minutes?
  • Check mempool.space for today's bitcoin network fees and what a small transaction would cost me in USD.
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