- Overview of Blockchain Guide
- Blockchain Developer Roadmap
- Introduction to Smart Contracts
- Smart Contracts in Solidity Guide
- Basics of Ethereum
- Solidity
- 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
- MIT OpenCourseWare
- Duke's Decentralized Finance course
- Princeton's Cryptocurrency Course
- UPenn's Fintech Certificate
| 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 |
| 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. 💚