Some company's, block explorers and payment processors offer a public API for feerate estimations. Is there a list of publicly available feerate estimation APIs?
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You seem to have asked this question so that you could promote your own blog post/content.– LenwoodCommented Aug 2, 2019 at 14:40
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I've created this question to share my knowledge about this topic with the community. This is encouraged by the StackExchange platform. While I disclose that the answer is based on other content by me, there there is no need to open / read it to find the answer to the question.– 0xb10cCommented Aug 2, 2019 at 14:54
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1 Answer
I've listed some public feerate APIs by block explorers and payment processors below. Purposefully leaving out APIs from wallets, since they don't advertise their APIs. I leave out Bitcoin Core's estimatesmartfee RPC, which I don't consider public (as in reachable over the web by everyone).
The list is sorted lexicographically. Disclosure: This Q&A is based on a blog post by me.
bitcoiner.live API
URL: https://bitcoiner.live/api/fees/estimates/latest
Note: Estimates for confirmation in 1/2, 1, 2, 3, 6, 12 and 24 hours.
Unit: sat/vByte
Bitgo API
URL: https://www.bitgo.com/api/v2/btc/tx/fee
Note: Estimates for different block targets based on current mempool.
Unit: sat/kB
Bitpay Insight API
URL: https://insight.bitpay.com/api/utils/estimatefee?nbBlocks=2,4,6
Note: Estimates for different block targets based on nbBlocks parameter.
Unit: BTC/kB
Blockchain.info API
URL: https://api.blockchain.info/mempool/fees
Note: Estimates for a regular and priority feerate are provided.
Unit: sat/Byte
Blockchair API
URL: https://api.blockchair.com/bitcoin/stats
Note: A single estimate for a feerate is provided.
Unit: sat/Byte
BlockCypher API
URL: https://api.blockcypher.com/v1/btc/main
Note: Estimates for a high, medium and low feerate are provided.
Unit: sat/kB
Blockstream.info API
URL: https://blockstream.info/api/fee-estimates
Note: Estimates for confirmation in 2, 3, 4, 6, 10, 20, 144, 504 and 1008 blocks.
Unit: sat/vByte
BTC.com API
URL: https://btc.com/service/fees/distribution
Note: A single estimate for a 'one block' feerate is provided.
Unit: sat/vByte
earn.com API
URL: https://bitcoinfees.earn.com/api/v1/fees/recommended
Note: Estimates for the fastest confirmation, a confirmation in half an hour and a hour are provided.
Unit: sat/vByte