BitKey - BitKey is a live USB/CD platform that provides highly secure Bitcoin transactions by creating an air-gapped environment, supporting various modes for different security needs.
HD Wallet Scanner - This tool scans Bitcoin HD wallets to discover all used addresses, effectively overcoming the typical gap limits set by wallet software.
Mining visualization - Yogh.io offers real-time visualization tools for Bitcoin mining, providing insights into blocks, transactions, and the blockchain structure.
Nigiri - Nigiri is a command-line tool that allows developers to quickly set up a local Bitcoin and Liquid network environment for testing and development purposes.
Pycoin - Pycoin is a Python library for Bitcoin and other alt-coins, focusing on a variety of utility functions for key management, transaction creation, and more.
bx - A versatile command-line tool for Bitcoin, bx offers a wide range of network and blockchain utilities to facilitate various operations.
hal - Hal is a Swiss army knife for Bitcoin, built with Rust, providing tools for key management, transaction building, and more, all from the command line.
hellobitcoin - A simple set of programs for generating Bitcoin wallets, creating and signing transactions, and broadcasting them over the Bitcoin network.
<qr-code> – This repository hosts a customizable, dependency-free SVG-based <qr-code> web component suitable for a variety of applications.
txwatcher - Txwatcher is a Python utility that monitors Bitcoin addresses for activity via the Blockchain Websocket API and allows for custom callbacks when transactions occur.
3xpl.com - 3xpl is a high-speed, ad-free universal blockchain explorer that supports a wide range of cryptocurrencies, offering robust data services and APIs for developers and analysts.
Bitquery.io - Bitquery is a blockchain data platform providing APIs for over 40 chains, NFT analytics, and tools for monitoring cryptocurrency money flows.
block.io - Block.io offers easy-to-integrate APIs for Bitcoin, Dogecoin, and Litecoin wallets and transactions with robust security features.
blockchair.com - Blockchair serves as a versatile search engine and blockchain explorer supporting multiple cryptocurrencies with additional data analytics services.
BlockCypher - BlockCypher is a cloud-optimized platform providing blockchain solutions including APIs for building applications on various blockchains.
BTC Connect - BTC Connect facilitates a unified wallet connection interface for Bitcoin Layer-1 and Layer-2 networks, enhancing user interaction with blockchain applications.
Chain.com - Chain.com provides blockchain infrastructure for organizations to build better financial services around blockchain technology.
Chainradar API - This API serves as a blockchain explorer tool for Chainradar, supporting multiple cryptocurrency networks.
Coinbase Wallet - Coinbase Wallet is a user-friendly cryptocurrency wallet supporting a wide range of digital assets with added security and ownership features.
Cryptocurrency Alerting - This platform provides monitoring and alerting services for cryptocurrency wallets and blockchain events, ensuring security and compliance.
Esplora - Esplora is an open-source and self-hosted blockchain explorer designed to deliver detailed blockchain data efficiently.
Insight - Insight offers a comprehensive API and blockchain explorer designed to meet the needs of developers and enterprises in analyzing blockchain data.
One-Time Address - This project offers a secure method to share Bitcoin addresses, enhancing privacy and reducing risks associated with address reuse.
https://docs.coinmetrics.io/api/v2/ - CoinMetrics.io offers a JSON REST API that provides access to a wide range of cryptocurrency market data, with both free and paid versions, as well as downloadable CSV data files for comprehensive historical and real-time analysis.
Messari.io - Messari.io provides a JSON REST API that includes free and paid access to detailed cryptocurrency market data, news, and a wide array of metrics and profiles.
BitGo - BitGo provides an API for digital asset financial services, supporting high-security operations for custody, trading, and lending of digital assets.
Coinbase - Coinbase offers an API that enables developers to integrate cryptocurrency payment services and automate trading functionalities.
BIP32 - BIP32 provides a standardized API for generating hierarchical deterministic wallets for secure Bitcoin key management
https://www.blockchain.com/api - Blockchain.com features an API that allows developers to access blockchain data and interact with their cryptocurrency wallets.
walletOS - walletOS offers an API for managing digital wallets across multiple blockchains, facilitating easier access to decentralized finance.
Coinb.in: Coinb.in offers an open-source web-based wallet that allows users to interact directly with blockchain networks for transactions without intermediaries.
CoPay by BitPay: CoPay is an open-source wallet from BitPay that supports multiple personal and shared wallets, comprehensive security features, and multi-signature functionality.
Electrum: Electrum provides a secure, open-source wallet solution known for its speed and low resource usage, primarily focused on Bitcoin.
libsecp256k1 - libsecp256k1 is an optimized C library for elliptic curve operations on curve secp256k1, focusing primarily on the efficient and secure implementation of the cryptographic schemes used in Bitcoin.
Libbitcoin - Libbitcoin is a comprehensive Bitcoin toolkit library for asynchronous applications, providing a robust toolset for building Bitcoin applications.
libwally-core - libwally-core is a cross-platform library for Bitcoin wallet development, offering tools for building applications that handle wallet creation, key management, and transaction building.
Awesome CryptoCoinJS - A curated list of packages and resources for working with CryptoCoinJS, highlighting tools for cryptocurrency development in JavaScript.
bcoin - bcoin provides a powerful JavaScript bitcoin library designed for node.js and browser environments, facilitating the development of robust bitcoin applications.
Bitcore Library - Bitcore Library is a JavaScript library for application development within the Bitcoin network, offering a rich set of utilities for manipulating Bitcoin data.
Bitcoinjs-lib - Bitcoinjs-lib is a popular and comprehensive JavaScript library for Bitcoin network applications, supporting advanced features like SegWit.
BlockTrail SDK NodeJS - BlockTrail SDK provides developers with a NodeJS library to easily integrate Bitcoin functionalities into their applications and services.
Cryptocoin - Cryptocoin is a JavaScript project focused on crypto standards, featuring modular packages for cryptocurrency applications.
Libauth - Libauth is a lightweight, zero-dependency JavaScript/TypeScript library for Bitcoin, offering tools for efficient development without external dependencies.
noble-curves - noble-curves is an audited, high-security TypeScript library implementing elliptic curve cryptography, including secp256k1 and Schnorr signatures.
noble-secp256k1 - This library provides a minimalist and highly educational implementation of the secp256k1 curve, optimized for size and clarity in TypeScript.
scure-btc-signer - scure-btc-signer is a secure and minimal library for creating, signing, and decoding Bitcoin transactions, supporting advanced features like Schnorr signatures and Taproot.
BlockTrail PHP SDK - The BlockTrail PHP SDK enables PHP developers to interact with the BlockTrail API, facilitating the integration of Bitcoin wallet functionalities into PHP applications.
PHP-OP_RETURN - PHP-OP_RETURN is a PHP library that provides a straightforward way to add OP_RETURN data to Bitcoin transactions, which is useful for embedding small pieces of data on the blockchain.
bech32rb - bech32rb is a Ruby library for encoding and decoding both Bech32 and Bech32m formats, which are used for formatting Bitcoin SegWit addresses.
bip-schnorrrb - bip-schnorrrb is a Ruby library that implements the Schnorr signature scheme as specified for Bitcoin, enhancing security and efficiency in digital signatures.
Bitcoin-ruby - Bitcoin-ruby is a comprehensive Ruby library for building Bitcoin-based applications, featuring tools for creating and managing wallets, building transactions, and more.
bitcoinrb - bitcoinrb provides a Ruby library that includes a Bitcoin script interpreter among other core functionalities, facilitating the development of Bitcoin applications in Ruby.
bitcoin_tools - bitcoin_tools is a Python library designed for constructing and analyzing Bitcoin transactions and scripts, including custom ones, and features a UTXO set analysis tool along with comprehensive documentation.
BlockTrail SDK Python - The BlockTrail SDK for Python provides developers with tools to integrate Bitcoin functionalities, such as wallet creation, transaction building, and data retrieval, into their Python applications.
btctxstore - btctxstore is a simple Python library that facilitates the storage and retrieval of data within Bitcoin transactions using the OP_RETURN opcode.
oogway - oogway is a secure Bitcoin utility library for Python, offering robust tools for handling cryptographic operations, address generation, and more.
pybitcointools - pybitcointools is a discontinued Python library created by Vitalik Buterin, which focused on Bitcoin transactions and signature scripting.
pycoin - pycoin is a Python library that supports Bitcoin key management, signature creation, and transaction operations, and includes tools for manipulating keys and transactions.
BitcoinJ - BitcoinJ is an open-source Java library for working with Bitcoin, providing tools to interact directly with the Bitcoin network for wallet creation, transaction handling, and blockchain querying.
Bitcoin Spring Boot Starter - This library integrates Bitcoin services into Spring Boot applications, facilitating easy configuration and setup of Bitcoin-related components.
XChange - XChange is a library that offers a unified API for interacting with over fifty different Bitcoin and cryptocurrency exchanges, simplifying the process of executing trades and retrieving data.
Bitcoin-S - Bitcoin-S is a Scala/JVM toolkit designed for Bitcoin applications, featuring robust implementations of Bitcoin data structures, transaction signing capabilities, and strongly typed clients for bitcoind and Eclair RPC services.
https://github.com/GigaBitcoin/secp256k1.swift - secp256k1.swift is a Swift package designed for secp256k1 applications, incorporating Elliptic Curve operations, Schnorr signatures, Zero-Knowledge Proofs (ZKP), and other cryptographic functionalities suitable for Bitcoin development.
BitcoinLib - BitcoinLib is a comprehensive and battle-tested .NET library and RPC wrapper for Bitcoin and Altcoins, developed in C#, offering extensive features and up-to-date functionalities for cryptocurrency applications.
NBitcoin - NBitcoin is a versatile Bitcoin library for the .NET framework, providing a robust set of tools to manage Bitcoin operations, suitable for developers working with C# and other .NET languages.
Haskoin-core - Haskoin Core is a Bitcoin and Bitcoin Cash library written in Haskell, providing a suite of functions for handling various Bitcoin operations.
Bitcoin IDE - Bitcoin IDE simplifies Bitcoin Script programming, offering an accessible interface for beginners to learn and test scripts.
Bitcoin Script Debugger - This tool visualizes the execution of Bitcoin scripts for real transactions, aiding in debugging and understanding script behaviors.
Bitauth IDE - Bitauth IDE is an interactive environment for developing and testing Bitcoin smart contracts, featuring tools to write and simulate the execution of scripts.
Bitcore Playground - Bitcore Playground provides a web-based interface for experimenting with Bitcore's features, including building and testing Bitcoin transactions.
blockchain-demo - A web-based educational tool that demonstrates the fundamental concepts of blockchain technology through interactive visualizations.
ChainQuery Bitcoin RPC - ChainQuery allows users to explore and test Bitcoin RPC API calls directly in the browser, with access to comprehensive RPC documentation.
Mnemonic Code generator - This online tool generates mnemonic codes for creating deterministic keys, commonly used in cryptocurrency wallets.
Script Debugger - Script Debugger is a command-line tool for stepping through Bitcoin scripts to help developers understand and debug them.
Script Playground - Script Playground offers an online environment to write, test, and learn Bitcoin Script, providing a hands-on approach to understanding script operations.
BitcoinABE - Abe: a free block chain browser for Bitcoin-based currencies
BitcoinDatabaseGenerator - A high performance data transfer tool that can be used to copy data from Bitcoin Core blockchain files to a SQL Server database.
Blockparser+SQL - Fast, quick and dirty bitcoin blockchain parser.
Chaingraph – A multi-node blockchain indexer and GraphQL API.
WebBTC - These are postgres database dumps of the bitcoin-ruby-blockchain database generated by webbtc.com.
Bitcore - Bitcore has evolved from a Node.js library to a comprehensive full node implementation, allowing direct interaction with the Bitcoin network.
Bitcore Node - Bitcore Node bridges Bitcoin's original daemon, bitcoind, with Node.js, providing a robust API and extended functionalities for Bitcoin applications.
Bitcoin-ruby-node - Bitcoin-ruby-node implements a full Bitcoin node in Ruby, building on the bitcoin-ruby-blockchain library to process network transactions.
btcd - btcd is a Bitcoin full node implementation written in Go, known for its robustness and distinct codebase separate from Bitcoin's original C++ implementation.
Fullnode - Fullnode is a JavaScript Bitcoin full node that mirrors Bitcoin's functionalities in a language accessible to web developers.
A Gentle Introduction to Bitcoin Core Development - This reading material offers a beginner-friendly overview of Bitcoin Core development, easing newcomers into the complexities of Bitcoin's backend.
Bitcoin Programming with BitcoinJS and Bitcoin Core CLI - This resource serves as a practical guide to programming Bitcoin applications using BitcoinJS and the Bitcoin Core command-line interface, complete with code examples.
Bitcoin Protocol Development Curriculum - Chaincode Labs - Offered by Chaincode Labs, this curriculum provides structured learning modules on Bitcoin protocol development, targeting those interested in contributing to its core technology.
Bitcoin Stackexchange - A community-driven Q&A site where users can find a vast range of questions and answers on diverse Bitcoin-related topics, ideal for both learning and troubleshooting.
btcinformation.org / Developer Documentation - This website compiles a wealth of developer resources, guides, and reference material essential for anyone developing Bitcoin-related software.
Elliptic Curve Cryptography A Gentle Introduction - This introduction demystifies the principles of Elliptic Curve Cryptography, crucial for understanding the cryptographic underpinnings of Bitcoin.
Grokking Bitcoin - "Grokking Bitcoin" explains the technical aspects of Bitcoin in a visually rich format, ideal for those who prefer learning with detailed diagrams and less jargon.
Mastering Bitcoin - "Mastering Bitcoin" by Andreas M. Antonopoulos is a comprehensive guide to Bitcoin technology, covering everything from blockchain basics to advanced topics, widely regarded as essential reading for serious practitioners.
Bitcoin & Cryptocurrency - This educational course, based on the book "Bitcoin and Cryptocurrency Technologies" from Princeton University, offers a comprehensive introduction to the revolutionary technologies of Bitcoin and other cryptocurrencies. It includes lectures, videos, and other educational materials that cover the technical aspects of how cryptocurrencies work.
@lopp / Bitcoin Developers - This Twitter list curated by Jameson Lopp provides a valuable resource for anyone looking to follow software developers with experience in Bitcoin implementations and applications, fostering a deeper understanding through real-time updates and insights.
@lopp / Lightning Developers - Another curated list by Jameson Lopp, focusing on developers experienced in Lightning Network implementations and applications, offering learners direct access to expert opinions and developments.
A brief history of Bitcoin development... - This video provides a historical overview of Bitcoin development, making it a useful educational resource for understanding the evolution of Bitcoin technology.
bitcoin-resources.com - This site serves as a comprehensive meta-list of Bitcoin resources, including books, articles, and podcasts, ideal for anyone seeking to learn about various aspects of Bitcoin from multiple perspectives.
Jameson Lopp Bitcoin Resource List - Jameson Lopp's detailed and curated list of Bitcoin resources serves as an extensive guide for learners, covering a wide range of topics from technical details to general knowledge.
Practical Bitcoin Info - Google Sheets - This Google Sheet is a collection of practical Bitcoin information and resources, useful for quick reference and learning specific aspects of Bitcoin handling and usage.
River Learn - River Learn offers a collection of educational materials designed to help users understand the basics of Bitcoin, its investment potential, technology, and much more, structured to support both newcomers and experienced individuals.