Blockchain Resources and Projects 🌍🚀

Background Knowledge ✔️

• Overview of Blockchain Guide
• Blockchain Developer Roadmap
• Introduction to Smart Contracts
• Smart Contracts in Solidity Guide
• Basics of Ethereum
• Solidity

Blockchain Projects Directory ⭐

• ATS: Functional Blockchain
• C#: Programming The Blockchain in C#
• Crystal: Write your own blockchain and PoW algorithm using Crystal
• Go: Building Blockchain in Go
• Go: Code your own blockchain in less than 200 lines of Go
• Java: Creating Your First Blockchain with Java
• JavaScript: A cryptocurrency implementation in less than 1500 lines of code
• JavaScript: Build your own Blockchain in JavaScript
• JavaScript: Learn & Build a JavaScript Blockchain
• JavaScript: Creating a blockchain with JavaScript
• JavaScript: How To Launch Your Own Production-Ready Cryptocurrency
• JavaScript: Writing a Blockchain in Node.js
• Kotlin: Let’s implement a cryptocurrency in Kotlin
• Python: Learn Blockchains by Building One
• Python: Build your own blockchain: a Python tutorial
• Python: A Practical Introduction to Blockchain with Python
• Python: Let’s Build the Tiniest Blockchain
• Ruby: Programming Blockchains Step-by-Step (Manuscripts Book Edition)
• Scala: How to build a simple actor-based blockchain

Blockchain Courses 📚

• MIT OpenCourseWare
• Duke's Decentralized Finance course
• Princeton's Cryptocurrency Course
• UPenn's Fintech Certificate

White Papers and Research 🥇

• Bitcoin
• Ethereum
• Ethereum's Research

Free Blockchain and Cryptocurrency APIs

Blockchain

API	Description	Auth	HTTPS	CORS
Bitquery	Onchain GraphQL APIs & DEX APIs	apiKey	Yes	Yes
Chainlink	Build hybrid smart contracts with Chainlink	No	Yes	Unknown
Chainpoint	Chainpoint is a global network for anchoring data to the Bitcoin blockchain	No	Yes	Unknown
Covalent	Multi-blockchain data aggregator platform	apiKey	Yes	Unknown
Etherscan	Ethereum explorer API	apiKey	Yes	Yes
Helium	Helium is a global, distributed network of Hotspots that create public, long-range wireless coverage	No	Yes	Unknown
Nownodes	Blockchain-as-a-service solution that provides high-quality connection via API	apiKey	Yes	Unknown
Steem	Blockchain-based blogging and social media website	No	No	No
The Graph	Indexing protocol for querying networks like Ethereum with GraphQL	apiKey	Yes	Unknown
Walltime	To retrieve Walltime's market info	No	Yes	Unknown
Watchdata	Provide simple and reliable API access to Ethereum blockchain	apiKey	Yes	Unknown

Cryptocurrency

API	Description	Auth	HTTPS	CORS
0x	API for querying token and pool stats across various liquidity pools	No	Yes	Yes
1inch	API for querying decentralize exchange	No	Yes	Unknown
Alchemy Ethereum	Ethereum Node-as-a-Service Provider	apiKey	Yes	Yes
apilayer coinlayer	Real-time Crypto Currency Exchange Rates	apiKey	Yes	Unknown
Binance	Exchange for Trading Cryptocurrencies based in China	apiKey	Yes	Unknown
Bitcambio	Get the list of all traded assets in the exchange	No	Yes	Unknown
BitcoinAverage	Digital Asset Price Data for the blockchain industry	apiKey	Yes	Unknown
BitcoinCharts	Financial and Technical Data related to the Bitcoin Network	No	Yes	Unknown
Bitfinex	Cryptocurrency Trading Platform	apiKey	Yes	Unknown
Bitmex	Real-Time Cryptocurrency derivatives trading platform based in Hong Kong	apiKey	Yes	Unknown
Bittrex	Next Generation Crypto Trading Platform	apiKey	Yes	Unknown
Block	Bitcoin Payment, Wallet & Transaction Data	apiKey	Yes	Unknown
Blockchain	Bitcoin Payment, Wallet & Transaction Data	apiKey	Yes	Unknown
blockfrost Cardano	Interaction with the Cardano mainnet and several testnets	apiKey	Yes	Unknown
Brave NewCoin	Real-time and historic crypto data from more than 200+ exchanges	apiKey	Yes	Unknown
BtcTurk	Real-time cryptocurrency data, graphs and API that allows buy&sell	apiKey	Yes	Yes
Bybit	Cryptocurrency data feed and algorithmic trading	apiKey	Yes	Unknown
CoinAPI	All Currency Exchanges integrate under a single api	apiKey	Yes	No
Coinbase	Bitcoin, Bitcoin Cash, Litecoin and Ethereum Prices	apiKey	Yes	Unknown
Coinbase Pro	Cryptocurrency Trading Platform	apiKey	Yes	Unknown
CoinCap	Real time Cryptocurrency prices through a RESTful API	No	Yes	Unknown
CoinDCX	Cryptocurrency Trading Platform	apiKey	Yes	Unknown
CoinDesk	CoinDesk's Bitcoin Price Index (BPI) in multiple currencies	No	Yes	Unknown
CoinGecko	Cryptocurrency Price, Market, and Developer/Social Data	No	Yes	Yes
Coinigy	Interacting with Coinigy Accounts and Exchange Directly	apiKey	Yes	Unknown
Coinlib	Crypto Currency Prices	apiKey	Yes	Unknown
Coinlore	Cryptocurrencies prices, volume and more	No	Yes	Unknown
CoinMarketCap	Cryptocurrencies Prices	apiKey	Yes	Unknown
Coinpaprika	Cryptocurrencies prices, volume and more	No	Yes	Yes
CoinRanking	Live Cryptocurrency data	apiKey	Yes	Unknown
Coinremitter	Cryptocurrencies Payment & Prices	apiKey	Yes	Unknown
CoinStats	Crypto Tracker	No	Yes	Unknown
CryptAPI	Cryptocurrency Payment Processor	No	Yes	Unknown
CryptingUp	Cryptocurrency data	No	Yes	Unknown
CryptoCompare	Cryptocurrencies Comparison	No	Yes	Unknown
CryptoMarket	Cryptocurrencies Trading platform	apiKey	Yes	Yes
Cryptonator	Cryptocurrencies Exchange Rates	No	Yes	Unknown
dYdX	Decentralized cryptocurrency exchange	apiKey	Yes	Unknown
Ethplorer	Ethereum tokens, balances, addresses, history of transactions, contracts, and custom structures	apiKey	Yes	Unknown
EXMO	Cryptocurrencies exchange based in UK	apiKey	Yes	Unknown
FTX	Complete REST, websocket, and FTX APIs to suit your algorithmic trading needs	apiKey	Yes	Yes
Gateio	API provides spot, margin and futures trading operations	apiKey	Yes	Unknown
Gemini	Cryptocurrencies Exchange	No	Yes	Unknown
Hirak Exchange Rates	Exchange rates between 162 currency & 300 crypto currency update each 5 min, accurate, no limits	apiKey	Yes	Unknown
Huobi	Seychelles based cryptocurrency exchange	apiKey	Yes	Unknown
icy.tools	GraphQL based NFT API	apiKey	Yes	Unknown
Indodax	Trade your Bitcoin and other assets with rupiah	apiKey	Yes	Unknown
INFURA Ethereum	Interaction with the Ethereum mainnet and several testnets	apiKey	Yes	Yes
Kraken	Cryptocurrencies Exchange	apiKey	Yes	Unknown
KuCoin	Cryptocurrency Trading Platform	apiKey	Yes	Unknown
Localbitcoins	P2P platform to buy and sell Bitcoins	No	Yes	Unknown
Mempool	Bitcoin API Service focusing on the transaction fee	No	Yes	No
MercadoBitcoin	Brazilian Cryptocurrency Information	No	Yes	Unknown
Messari	Provides API endpoints for thousands of crypto assets	No	Yes	Unknown
Nexchange	Automated cryptocurrency exchange service	No	No	Yes
Nomics	Historical and realtime cryptocurrency prices and market data	apiKey	Yes	Yes
NovaDax	NovaDAX API to access all market data, trading management endpoints	apiKey	Yes	Unknown
OKEx	Cryptocurrency exchange based in Seychelles	apiKey	Yes	Unknown
Poloniex	US based digital asset exchange	apiKey	Yes	Unknown
Solana JSON RPC	Provides various endpoints to interact with the Solana Blockchain	No	Yes	Unknown
Technical Analysis	Cryptocurrency prices and technical analysis	apiKey	Yes	No
VALR	Cryptocurrency Exchange based in South Africa	apiKey	Yes	Unknown
WorldCoinIndex	Cryptocurrencies Prices	apiKey	Yes	Unknown
ZMOK	Ethereum JSON RPC API and Web3 provider	No	Yes	Unknown

Sample Code included in repo from First Blockchain in Java and Tiniest Blockchain in Python tutorials. For more projects and free APIs, check out: Build Your Own X and Public APIs repo. 💚