estimatesmartfee | Alchemy Docs

Estimates the approximate fee per kilobyte required for a transaction to begin confirmation within conf_target blocks. Uses BIP 141 virtual transaction size.

Path parameters

apiKeystringRequired

Request

This endpoint expects an object.

conf_targetintegerRequired>=1<=1008

Number of blocks within which confirmation is targeted.

estimate_modeenumRequired

Fee estimate mode. Options are “UNSET”, “ECONOMICAL”, or “CONSERVATIVE”.

Allowed values:

Response

Estimated fee rate and corresponding target blocks.

feeratedoubleOptional

Estimated fee rate in BTC per KB.

blocksintegerOptional

The actual confirmation target (may differ if estimate unavailable).

1	import requests
2
3	url = "https://bitcoin-mainnet.alchemy-blast.com/v2/:apiKey"
4
5	payload = {
6	"0": 1,
7	"1": "UNSET"
8	}
9	headers = {"Content-Type": "application/json"}
10
11	response = requests.post(url, json=payload, headers=headers)
12
13	print(response.json())

1	{
2	"jsonrpc": "2.0",
3	"id": "1",
4	"result": {
5	"feerate": 0.00002465,
6	"blocks": 2
7	}
8	}