Fee Estimation for a Transaction

Time	Status	User Agent
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Compute Unit Value: 50 (fixed) Skip link to compute unit value

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Click Try It! to test the endpoint with the default values or customize your request by following these steps:

Enter your API key in the Header: token text box (top right).

You can get a free API key here .

Enter the parameters available below.

Click Try It!.

For an in-depth tutorial, take a look at this video to learn how to estimate Ethereum Gas Fees with Blockdaemon's REST API.

Supported Protocols & Networks

Protocol	Network	Path Parameter
Avalanche	Mainnet-c	`avalanche/mainnet-c`
Testnet-c	`avalanche/testnet-c`
Bitcoin	Mainnet	`bitcoin/mainnet`
Testnet	`bitcoin/testnet`
Testnet4	`bitcoin/testnet4`
Bitcoincash	Mainnet	`bitcoincash/mainnet`
Testnet	`bitcoincash/testnet`
BNB	Mainnet	`bnb/mainnet`
Testnet	`bnb/testnet`
Dogecoin	Mainnet	`dogecoin/mainnet`
Testnet	`dogecoin/testnet`
Ethereum	Mainnet	`ethereum/mainnet`
Sepolia	`ethereum/sepolia`
Hoodi	`ethereum/hoodi`
Litecoin	Mainnet	`litecoin/mainnet`
Testnet	`litecoin/testnet`
Polkadot	Mainnet	`polkadot/mainnet`
Westend	`polkadot/westend`
Polygon	Mainnet	`polygon/mainnet`
Amoy	`polygon/amoy`
Solana	Mainnet	`solana/mainnet`
Testnet	`solana/testnet`
Devnet	`solana/devnet`
Kaia	Mainnet	`kaia/mainnet`
Kairos (Testnet)	`kaia/kairos`
XRP	Mainnet	`xrp/mainnet`
Testnet	`xrp/testnet`

protocol

string

required

Defaults to bitcoin

Protocol handle, one of: avalanche, bitcoin, bitcoincash, dogecoin, ethereum, litecoin, polkadot, polygon, solana, and kaia.

network

string

required

Defaults to mainnet

Which network to target. Available networks can be found in the list of supported protocols or with /{protocol}.

``200 Protocols Overview

``401 Invalid or expired token

``429 Rate limit exceeded

``500 An internal server error happened

``503 The resource you are trying to access is currently unavailable

Sample CURL Request

curl --request GET \
 
     --url https://svc.blockdaemon.com/universal/v1/bitcoin/mainnet/tx/estimate_fee \
 
     --header 'X-API-Key: ••••' \
 
     --header 'accept: application/json'

application/json

200 - simple fee200 - evm401429500503