Bitcoin APIs

Bitcoin APIs focus on the original chain's blocks, mempool and fees. Mempool and Blockchain.com both offer keyless block, transaction and address data, with Mempool adding fee estimates and Lightning. BTCGlobe reads two home full nodes, and btcnode.uk charges per call in USDC or Lightning with no signup. Bitcoin Halving and SoloLuck are narrower, and OpenNode handles accepting Bitcoin payments.

7 listings

Table Rows

API	Pricing	Auth	Format	Free tier	Status
Bitcoin HalvingComputes Bitcoin's halving era, block subsidy and blocks-to-next-halving for any block height. Crypto › Blockchain Data & Nodes	Free	None	JSON	Unlimited	Live
Block.ioBitcoin, Dogecoin and Litecoin blockchain data: balances, transactions, blocks and unspent outputs. Crypto › Blockchain Data & Nodes	Paid	API key	JSON	—	Deprecated
Blockchain.com Data APILive Bitcoin blockchain data: blocks, transactions, addresses, and market/network charts. Crypto › Blockchain Data & Nodes	Freemium	None	JSON	Unlimited	Live
BTCGlobeLive Bitcoin data from two home full nodes: block height, fees, mempool, peer counts and price. Crypto › Blockchain Data & Nodes	Free	None	JSON	Unlimited	Live
btcnode.ukLive Bitcoin node data (blocks, mempool, fees, addresses), paid per call in USDC or Lightning, no signup. Crypto › Blockchain Data & Nodes	Paid	Other	JSON	—	Live
MempoolLive Bitcoin mempool, fee estimates, block, address and Lightning Network data. Crypto › Blockchain Data & Nodes	Freemium	None	JSON	—	Live
OpenNodeAccept Bitcoin and Lightning payments via hosted checkout or charges, with auto-conversion to fiat. Crypto › Crypto Payments		API key	JSON	—	Live
SoloLuckBitcoin solo-mining pool stats, per-address miner data, and an open dataset of verified solo-mined blocks. Crypto › Blockchain Data & Nodes	Free	None	JSON	10k+/day	Live

Choosing a Bitcoin API

Is there a free Bitcoin API?

Yes. Bitcoin Halving, BTCGlobe and SoloLuck are free to use, and Mempool and Blockchain.com Data API have a free tier alongside paid plans.

Which Bitcoin APIs work without an API key?

Mempool, Blockchain.com Data API, Bitcoin Halving, BTCGlobe and SoloLuck need no key or sign-up, so you can try them with a plain request.

Can I call a Bitcoin API from front-end JavaScript?

Mempool, Bitcoin Halving, BTCGlobe and SoloLuck allow cross-origin requests and need no key, so they work straight from the browser. For the others, call them from your server so your key stays private.

Can I use Bitcoin APIs in a commercial project?

OpenNode, Bitcoin Halving, btcnode.uk and SoloLuck permit commercial use.

Which Bitcoin APIs work with AI agents?

Blockchain.com Data API and btcnode.uk publish an OpenAPI spec for generating clients and tools.

Broader: Blockchain Data & Nodes APIs · Crypto APIs

More in Blockchain Data & Nodes: Ethereum APIs · Solana APIs · RPC Nodes APIs · Crypto Wallet APIs · NFT APIs