Best Free Blockchain APIs of 2024

The easiest and fastest blockchain development platform. Unified framework for 40+ digital assets and 40+ blockchain protocols. One Javascript SDK that supports all 40+ blockchain protocols. Simplify your development by integrating any blockchain directly into your JavaScript Backend. WooCommerce allows you to create and sell NFTs from within your WooCommerce website. The plugin is free and easy to set up in minutes. Open-source key management system that secures your private keys, mnemonics and allows you to sign transactions on-premise. A command line interface for interacting with blockchains. Access our infrastructure via REST API, with unified commands across all supported Blockchains. You can quickly and easily create apps on any supported Blockchain without any previous blockchain experience.

Chainstack's APIs and software are used by thousands of businesses, large and small, to build, scale, and maintain blockchain applications. To ensure your security and control, Chainstack's APIs offer secure node connections and key security best practices. Invite other members to join your network and deploy their infrastructure using simple network management tools. You can build and deploy the blockchain protocol that suits your needs. The protocol will never be updated or modified again. Chainstack's managed services for blockchain make it easy to launch, join, and scale decentralized networks. You can now safely experiment with enterprise-grade tools and services and then run production. Continuously monitor and provision your resources.

GetBlock is a Blockchain-as-a-Service (BaaS) platform that provides a fast and easy API connection to full nodes from 50+ leading blockchain platforms. It allows you to request information on a node's chain without having to manually set it up with JSON-RPC or REST. This service is ideal for beginners and young entrepreneurs, as well for crypto developers and users. It is also suitable for those who do not have the resources or time to run their own full node. Register an account to get started with GetBlock. You will receive an API key and the relevant data on the dashboard.

Venly is a blockchain technology provider that creates tools and products to help companies benefit from blockchain technology. We offer a whole technology stack to bring platforms, apps, and brands into Web3. We provide marketplaces, wallets, and NFT solutions to assist businesses in smoothly integrating web3 technology and onboarding customers. Our solutions use a Web2 interface that developers and users are already familiar with to make blockchain easy to use. Venly enables the adoption of blockchain by offering reliable and user-friendly software solutions. We are making blockchain accessible for everyone. Venly's products and services include: WALLET SOLUTIONS → Instant Web3 Wallets for Your Users NFT TOOLS → Your Complete NFT Toolkit MARKETPLACE SOLUTIONS → NFT Marketplace Built for the Mainstream SHOPIFY NFT APP → Sell NFTs in Your Shopify Store WEB3 GAMING TOOLKIT → Make Your Game Web3 Ready

QuickNode simplifies blockchain infrastructure for teams big & small. A lightning-fast global API provides instant access to Ethereum, Solana, Bitcoin, Polygon, BSC, Fantom, Avalanche, Terra, Celo, Optimism, Arbitrum, Algorand, Harmony & Gnosis (xDai) networks. Access chain data via JSON-RPC over HTTPS or wss (websocket) endpoints. Monitor usage with analytics dashboard and ship faster with tools like 1-click WebHooks for smart-contract events, NFT, and ERC20 token APIs. Thousands of nodes launched; trusted by top blockchain projects & businesses; QuickNode is helping the blockchain ecosystem grow since 2017!

Our DEX GraphQL APIs allow you to trade multiple DEX protocols on different blockchains in real-time. Trade data can be accessed for protocols such as Kyber, Uniswap and 0x. You can analyze DEX markets, build charts, and analytics using DEX trade data. Bitquery is a collection of software products that can parse, index and store blockchain data in a unified manner. Market analytics for specific projects and industry patterns in different blockchain networks. Money flow analysis to assist in blockchain investigation and compliance. Find origin and destination funds. Analytics and APIs for Decentralized Finance (DeFi), protocols. Blockchain development through scientific research.

Crypto APIs is a blockchain infrastructure provider that makes developing and managing Web 3 solutions easy and efficient. The infrastructure suite includes The company's product suite includes Blockchain Data, Blockchain Events, Blockchain Automations, Blockchain Tools, Non-Custodial Wallets and Market Data. Developers access all tools with one seamless integration. They can deploy over 100 endpoints from a single provider by using just one SDK. The company's REST APIs work with multiple blockchain mainnets and testnets. They are suitable for building diverse solutions, including digital banks, exchanges, wallets, custodians, lending products, and more. Companies like Chainlink, Ledger, Nexo, PayPal, and Prime Trust are already using Crypto APIs. Customers love Crypto APIs' white glove support and robust features, calling Crypto APIs' products "reliable, effective, and fast". The company is ISO/IEC 27001:2013 certified - it incorporates advanced encryption and the highest security standards to protect customers' data and digital assets.

Blockchair API provides developers, researchers, and businesses with access to data contained in 17 blockchains. The API supports numerous analytical queries like filtering, sorting, and aggregating blockchain data with high uptime. Blockchair is the first blockchain explorer which incorporates a multitude of different blockchains into one search engine. Unlike most blockchain explorers and cryptocurrency companies, Blockchair does not collect personal data, nor does Blockchair share it with third-party analytics companies and ad networks.

InfStones, a Softbank portfolio company, is an advanced, enterprise-grade Platform as a Service (PaaS) blockchain infrastructure provider headquartered in the United States and backed by leading venture capital investors. The company is trusted by the top blockchain companies globally, including Binance, BitGo, CoinList, Circle, Poloniex, imToken, Dune Analytics, Chainlink, Polygon, NuCyher, Near, and many more. InfStones is dedicated to breaking down the barriers of blockchain adoption and Web3 application development by providing developers worldwide with a rugged, powerful node management platform alongside an easy-to-use API. InfStones' platform is battle-tested and supports over 15,000 nodes on over 60 blockchains. The infrastructure is incredibly reliable, fast, efficient, secure, and scalable - and specially designed for cross-chain DeFi, NFT, GameFi, and decentralized application development. Developers use the AI-based platform to easily connect and work with more than 50 leading blockchain protocols, pushing the boundaries of what it means to lead with a vision and passion for global innovation. InfStones is trusted by the biggest blockchain companies in the world including Binance, Coinlist, BitGo, OKX, and more.

Anyblock's Software-as-a-Service (SaaS) provides Blockchain JSON-RPC Access for Bitcoin, Ethereum & more. Our blockchain API is fast and reliable. Queries take less than 100 milliseconds. Multiple nodes are load-balanced. Clients for Ethereum: Parity/OpenEthereum & Besu Amazing support. Fast and personal responses. Technical advice with code samples. Extensive documentation: API, tutorials, FAQs, ...

You can create blockchain and digital asset solutions without having to start from scratch. Start small and quickly move to production. You can choose from popular cloud properties, hybrid deployment options, geographical regions, protocols, consensus mechanism, and many other options all at the touch of a button. It makes blockchain an easy-to-use endpoint that allows you to accelerate the development and deployment your d'Apps. An intuitive interface that allows you to manage all aspects of your blockchain networks and environments. Automated tools and workflows make it easy to scale your business network and onboard new members. Each member is responsible for managing their own key materials, data, and nodes. You can easily scale your network using single proxy operator or distributed network ownership. Manage your networks, memberships, users, and environments.

Vezgo offers one API to integrate with every Digital Asset. Whether you want to get access to data on Centralized Exchanges, Decentralized Wallets, NFTs or the Blockchain, Vezgo's API will provide a simple integration to allow your users to connect all their Web3 accounts. Vezgo bridges Web2 data into your Web2 use case. It's a simple API that will consolidate and aggregate your user's full balances, positions and transactions in a normalized and standardized data set you can use in your existing Web2 applications.

OnFinality is a platform for blockchain infrastructure that saves web3 builders their time and makes their lives simpler. OnFinality provides API endpoints that are scalable for the largest blockchain networks. It empowers developers to automate testing, deployment, scaling, and monitoring their own blockchain nodes within minutes. OnFinality has processed over 300 billion RPC requests to date across 70 networks, including Polkadot and Ethereum, Moonbeam and Astar. It is constantly expanding these mission-critical services to developers so they can build the decentralised future faster! OnFinality helps you to be smarter.

Ever Platform offers developers products, APIs and tools that help them build, test and run applications on TVM compatible networks (Everscale (TON), Venom (Gosh), etc.). Rich and high-availability APIs for TVM Blockchains. Small to large businesses that don't want their infrastructure managed. Enterprises, heavy-load DApps and enterprises who want the best API performance. Evercloud is designed for those who wish to maintain and run their own node, with basic API. It's for DApp developers, contract testers and DApp developers who want to test local before testing on real networks. A robust GraphQL-based API shared by all products allows for a smooth transition from local testing to production. Evercloud provides TVM developers with scalable GraphQL endpoints. Create Evercloud project to start your communication with Blockchain.

Infura's top-class infrastructure will ensure that your decentralized application scales to your users' needs. Our instant access APIs allow you to connect your app instantly. We support JSONRPC over HTTPS and WebSocket interfaces. We also provide subscription-based connections. You can start using Infura from a single URL. Our 24/7 team of experts can handle any network changes or upgrades so that you can concentrate on building your applications. We believe in a future that is powered by decentralized protocols and networks. So developers can spend their time creating and building, we provide the infrastructure necessary to make this happen. Our Infura dashboard allows you to access valuable insights, add apps, and much more. Do you have questions or need help? You can find answers in our active community, current status page, or directly in our expanding library.

Coinpath®, a set of APIs for blockchain money tracing, is based on a complex mathematical algorithm that can perform complex calculations among blockchain addresses to show money flow. Coinpath®, which uses machine learning and heuristics to determine clusters, transaction flows, and account balances, uses heuristics. Our Coinpath®, APIs are the backbone for multiple blockchain investigation and compliance options. The Coinpath®, a set API endpoints that can trace money to any source or destination, create money flow graphs and make aggregate transfers to addresses, is called Coinpath®. You can find the source and destination of money, as well as the amount and flow path. Coinpath®, which analyzes wallet transactions and addresses, creates a clear data graph of money flow and shows the path from funds' origins to various crypto services and VASPs. Our blockchain forensics technology allows customers to monitor their deposits and withdraws for "tainted coins" that are involved in money laundering, terrorist financing, etc.

One line of code can supercharge your development with the most powerful blockchain developer platform in the world, used by 70% of the top Ethereum apps. The most popular Ethereum API is Alchemy Supernode. All the functionality of a node is available, including JSON RPC support. However, you get the supercharged reliability and data correctness required to run top-level applications on the blockchain. Alchemy Build is an in-house suite that provides all the tools you need to quickly prototype, debug and ship products. You can instantly search through millions of historical requests, view transactions in real-time, make JSON/RPC calls from the dashboard, and scan for recent errors and requests. Alchemy Monitor provides a comprehensive suite dashboards and alerts to monitor app health, performance, user behavior, and other factors. Instantly check the health of all your apps, gain user insights without compromising privacy and get automated alerts.

NOWNodes is a Blockchain-as-a-Service that provides access to Full Nodes and Explorers via API. 50+ blockchain networks supported. Select the node you need, connect using available methods. We will take care of the rest. The service offers a high-quality infrastructure that's reliable, cost-effective, quick, and efficient. All partners have access to Service Quality Standards. Your nodes are monitored 24/7 to ensure their availability and relevance. Our clients enjoy the ability to scale for large tasks and rapid API responses.

Enterprise customers will be able to access a blockchain-based data registry as well as a verifiable credential system. This will allow them to independently verify data and processes. You can use blockchain to create entries that prove that data existed in a particular state at a specific time. Anyone with access to the data will be able to verify it against the blockchain version. Any Connect-enabled system can quickly detect any future changes to the data. Factom blockchain provides immutable evidence by publishing timestamped proof of your data and documents. This prevents costly disputes. The Factom blockchain keeps your evidence safe and available for review whenever you need it. The Factom blockchain is a strong public witness. As the protocol grows, more computers run the protocol and agree on entries, the witness to their proofs becomes irrefutable.

WatchData offers easy and reliable API access for Ethereum blockchain. WatchData offers many advantages, including: Data reliability - Uninterrupted connection without downtime - Process automation - High limits to suit all users - Support for different nodes - Resource scaling -High processing speeds

Our REST API was designed to support real-time use cases and handle massive parallelization. It makes it easy to retrieve data such as NFT Sales, ERC20 token balances, and DEX Swaps. With our SDK, you can quickly access all of this data in your production environment with just a few lines of code. For complete data ingestion flexibility, quickly create more complex queries or transformations. To power more complicated use cases, join across tables. This includes retrieving PnL leaderboards derived form NFT sales data. Smart floor prices for a collection list or the USD-equivalent balance from a wallet's ERC20 assets at any time in history. Serverless snippets can integrate with external data sources to perform transformations that are difficult with direct SQL. Access Transpose directly through your frontend to create powerful production UIs. You can get the data you need as quickly as possible with ultra-low latency queries.

BlockSpan is an NFT API platform that allows software companies to develop on blockchain technology. We combine data from multiple chains and offer an API layer to enable NFT developers to retrieve token values, current ownership, metadata, and cached images in real-time. It doesn't take much to support multiple blockchains or switch chains. Instead of scraping block logs, you can write a simple rest integration. Our API returns more than transaction data. It also returns price, current owner, metadata and other information. Currently, Ethereum, Polygon and Arbitrum are supported. More will be added in the future. We have extensive documentation that includes an interactive API console for each endpoint. Our NFT API supports token metadata and cached image URLs, saving API and IPFS calls to fetch this data.

Your NFT application can be brought to market in hours, not months. We handle the NFT infrastructure so that you can concentrate on your application. Built by developers for developers. Grasping Solidity, Web3.js, GraphQL, nodes, IPFS, etc. It is time-consuming, difficult, and often requires a team to cover all the skills. Teams can waste 25-50% engineering resources developing indexers, nodes, and so on. They try to reinvent the wheel. In a highly competitive market, using slow, incomplete, and rate-limited APIs can slow you down, which can lead to revenue loss and users being dissatisfied.

Web3 reliability and performance problems can be solved by efficiently utilizing the resources of hundreds third-party node provider combined with a state of the art decentralized blockchain API platform, and an improved user experience. Start building on the most relevant Web3 blockchain projects. Blast aims to provide one of the most resilient and decentralized infrastructure services in the industry and the fastest response time. It uses clustering mechanisms and third party node geographical distribution to assist Web3 developers in obtaining their infrastructure needs covered quickly and allow them to concentrate on the development of applications. Scaling is as simple as allowing more Node providers to join our network. Our protocol enforces good node behavior by conducting periodic checks and applying coercive actions for nodes that fail to perform, such as slashing staked tokens and exclusion from our network.

The 1inch Developer Portal, powered by the 1inch Labs, is a cloud SaaS (software as a service) platform for Web3 tools and services. The platform offers multiple advantages. The 1inch Aggregation Protocol facilitates price transparency and access to practically unlimited liquidity on many blockchains. Meanwhile, the Pathfinder algorithm discovers the most efficient paths for token swaps, enabling splits between different protocols and gas optimization to ensure the best possible swap rates. Another major advantage of 1inch APIs is a very short response time of below 400 ms, which is one of the best offerings on the market. Thanks to innovative gas optimization features, developers integrating 1inch APIs can offer their users substantial gas savings. Finally, 1inch APIs provide aggregated market data for self-custodial order executions. The currently available APIs are: Swap, Balance, Transaction Gateway, Orderbook, Traces, Fusion, Spot Price, Token, Portfolio, NFT, Gas Price.