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Free Bitcoins Miner Fee Estimator API

Stop overpaying for Bitcoin transactions using estimators that use historical data rather than real-time data. FreeBitcoins.com miner fee estimator looks at Bitcoin network and estimates the fee it would cost to insert the transaction 0.50 MB deep in the chain at the time of the send.

https://freebitcoins.com/xchange/api/v1/btcfee

Each Bitcoin block clears roughly 1.0 MB of chain transactions.

Our goal is to give people a way to estimate their Bitcoin sends without contributing to needless Bitcoin blockchain bloat.

We strongly recommend setting Replace By Fee (RBF). RBF allows you to resend your unconfirmed transaction with a higher miner fee.