Best Free Blockchain APIs of 2025 - Reviews & Comparison

QuickNode

QuickNode is a Web3 infrastructure platform that helps developers and businesses worldwide build, launch, and scale blockchain-powered applications (dApps), providing instant access to 20 chains across 35+ networks. With our lightning-fast global API, providing instant access to Ethereum, Solana, Bitcoin, and more, you can save valuable time safely without sacrificing performance and stay focused on what matters to you. Get started developing immediately with QuickNode API, or be notified of real-time events that matter to you with QuickAlerts. With QuickNode being trusted by the industry's best and most cutting edge, including companies like Adobe, Twitter, 1Inch, Nansen, and more, we are the best choice for developers, hobbyists & web-scale blockchain apps.

41 Ratings

Starting Price: Free

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Venly

Venly is a blockchain technology provider that creates tools and products to help companies benefit from blockchain technology. We provide a complete technology stack to bring brands, apps, games and platforms into Web3. We offer wallets, marketplaces, and NFT tools to help businesses integrate web3 tech & onboard users seamlessly. Our solutions provide a familiar Web2 experience to make blockchain accessible for both developers and users alike. Venly empowers the use of blockchain, by providing trusted and easy-to-use software solutions. We are making blockchain accessible for everyone. Products and services include: WALLET SOLUTIONS → Instant Web3 Wallets for Your Users MARKETPLACE SOLUTIONS → NFT Marketplace Built for the Mainstream NFT TOOLS → Your Complete NFT Toolkit SHOPIFY NFT APP → Sell NFTs in Your Shopify Store WEB3 GAMING TOOLKIT → Make Your Game Web3 Ready

33 Ratings

Starting Price: $0/month

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GetBlock

GetBlock is a service that provides instant API connection to full nodes from many leading blockchain networks, including BNB Smart Chain (BSC), Ethereum (ETH), Polygon (MATIC) and Solana (SOL), among others. Since 2019, the mission of GetBlock is to ensure cost-effective tools and infrastructure that will help enterprises and individual developers to build high-quality blockchain applications faster. The service allows you to request on-chain information from a node without the need to set up one manually. GetBlock is among the leaders of the Blockchain-as-a-Service (BaaS) segment: its instruments are utilized daily by thousands of users worldwide. Their clients can get their wallets, DEXs, trading bots, games to 50+ blockchains via an intuitive API-powered dashboard.

14 Ratings

Starting Price: $29

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Tatum

The fastest and easiest blockchain development platform. Unified framework for 40+ blockchain protocols and thousands of digital assets. A single, unified Javascript SDK, for over 40+ blockchain protocols. Simplify your development and integrate any blockchain directly into your JavaScript backend. Create and sell NFTs directly within your WooCommerce site. The plugin is completely free and can be set up within minutes. An open-source key management system for the most secure storing your private keys, mnemonics, and signing transactions on-premise. A command line interface to interact with blockchains. Access our infrastructure via REST API with unified commands across all supported blockchains. All blockchains are unified into one simple SDK. Effortlessly develop apps on any supported blockchain with no previous blockchain experience.

1 Rating

Starting Price: $9 per month

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Chainstack

From startups to large enterprises, thousands of businesses of all sizes use Chainstack’s software and APIs to build, run, and scale blockchain applications. Secure node connections and key security best-practices are built in to ensure you’re always in control. Grow your network by inviting other members to deploy their own infrastructure through simple network management and operation tools. Build and deploy on the blockchain protocol that meets your needs, then never worry about updates or changes to the protocol again. Chainstack’s managed blockchain services make it simple to join, launch, and scale decentralized networks and applications. Now you can safely experiment and run in production using enterprise-grade tools and services. Continuously monitor and provision your resources.

1 Rating

Starting Price: Free

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Bitquery

Our DEX GraphQL APIs provide real-time trades for multiple DEX protocols across different blockchains. You can access trade data for protocols like Kyber, Uniswap, 0x, Balancer protocol, PancakeSwap, etc. Based on DEX trade data, you can build charting, analytics, find arbitrage opportunities, or analyze DEX markets. Bitquery is a set of software products that parse, index, and store blockchain data in a unified way. Market analytics for specific projects and industry trends in different blockchain networks. Money flow analysis for blockchain investigation and compliance, find origin and destination of funds. Decentralized Finance (DeFi) protocols APIs and analytics. Scientific research for blockchain development.

3 Ratings

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Crypto APIs

Crypto APIs is a trusted Web 3 infrastructure provider for crypto applications & dApps. It is the easiest way to interact with blockchains. The company's product suite includes Blockchain Data, Blockchain Events, Blockchain Automations, Blockchain Tools, Non-Custodial Wallets and Market Data. Interoperability is one of the main benefits of Crypto APIs, as it supports multiple blockchains, tokens, and standards. Developers can use the product suite on both testnets and mainnets. The unified REST API endpoints guarantee easy access to different blockchains. SDK libraries make it easy for developers to build solutions using Crypto APIs endpoints. With a seamless one-time integration and advanced cryptographic security, Crypto APIs offers a perfect infrastructure layer for Web 3. It is ISO/IEC 27001:2013 certified – a testament to the company’s dedication to privacy and security.

Starting Price: $129 per month

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Anyblock

Anyblock Analytics

Anyblock’s Software-as-a-Service (SaaS) provides Blockchain JSON-RPC Access for Bitcoin, Ethereum & more. We use a fast and reliable blockchain API, query time is usually less than 100 ms. Load-balanced with multiple nodes. Parity/OpenEthereum & Besu clients for Ethereum. Amazing support. Quick and personal responses. Technical advice with code samples. Extensive documentation: API, tutorials, FAQs, ...

Starting Price: €199/month

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Blockchair

The Blockchair API offers developers, researchers, and businesses the ability to tap into data from 17 distinct blockchains. This API is equipped with a range of analytical tools, enabling tasks such as filtering, sorting, and data aggregation, all while maintaining impressive uptime. Blockchair stands out as the pioneer in merging various blockchains into a single search interface. In contrast to many other blockchain explorers and crypto entities, Blockchair prioritizes user privacy by refraining from gathering personal data and ensures it isn't distributed to external analytics firms or advertising networks.

Starting Price: 25$

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InfStones

InfStones, a Softbank portfolio company, is an advanced, enterprise-grade Platform as a Service (PaaS) blockchain infrastructure provider trusted by the top blockchain companies in the world. InStones’ AI-based infrastructure provides developers worldwide with a rugged, powerful node management platform alongside an easy-to-use API. With over 15,000 nodes supported on over 60 blockchains, InfStones gives developers all the control they need - reliability, speed, efficiency, security, and scalability - for cross-chain DeFi, NFT, GameFi, and decentralized application development. InfStones is trusted by the biggest blockchain companies in the world including Binance, Coinlist, BitGo, OKX, Chainlink, Polygon, Harmony, and Kucoin, among a hundred other customers. InfStones is dedicated to developing the next evolution of a better world through limitless Web3 innovation.

Starting Price: Free

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Infura

Infura's world-class infrastructure will ensure your decentralized application scales to meet your user demand. Connect your app immediately with our instant access APIs. We support JSON-RPC over HTTPS & WebSocket interfaces, providing request and subscription-based connections. Start using Infura with a single URL. Our 24/7 team of experts is ready to handle all network changes and upgrades so you can focus on building your applications. We believe in a future powered by decentralized networks and protocols. We provide world-class infrastructure for developers so you can spend your time building and creating. You can find valuable insights, add applications, and more through our Infura dashboard. Need help or have questions? Get answers in our active community, up-to-date status page, or dig directly into our expanding library of documentation.

Starting Price: $50 per month

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Kaleido

Create blockchain and digital asset solutions without the cost and complexity of building from scratch. Start small and rapidly move into production. Choose from popular cloud properties and hybrid deployment options, geographic regions, protocols, consensus mechanisms and more, all at the click of a button. Makes blockchain just another endpoint so you can accelerate development and deployment of your dapps. A robust, easy-to-use interface to manage everything about your blockchain networks and environments. Onboarding and scaling are built-in and instantaneous with automated tools and workflows so you can grow your business network with ease. Nodes, data and key materials are managed individually by each member. Scale the network with ease using distributed network ownership or single proxy operator. Manage your networks and memberships, users, environments, and more.

Starting Price: $‍ 0.15 per node per hour

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Alchemy

One magic line of code supercharges your development with the world’s most powerful blockchain developer platform, relied upon by 70% of the world's top Ethereum apps. Alchemy Supernode is the most widely used Ethereum API. Get all the functionality of a node, including JSON-RPC support, but with the supercharged reliability, data correctness and scalability needed to run world-class applications on the blockchain. Alchemy Build is a no-configuration in-house suite of developer tools to prototype, debug, and ship products faster. Instantly search through millions of historical requests, view real-time transactions in the mempool, make JSON-RPC calls directly from the dashboard, and quickly scan recent requests and errors. Alchemy Monitor is a comprehensive suite of dashboards and alerts for app health, performance, and user behavior. Instantly check on the health of all your apps in one place, gain user insights without compromising privacy, and get automated alerts.

Starting Price: $49 per month

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NOWNodes

NOWNodes is a Blockchain-as-a-Service that provides access to Full Nodes and Explorers via API. 50+ blockchain networks supported. Choose a node that you need, use available methods and connect. Focus on building wallets, exchanges, dApss and everything else — we will do the rest. The service provides a high-quality infrastructure that is quick, cost-effective, and reliable. We have Service Quality Standards available for all partners. Your nodes are under 24/7 surveillance - their availability and relevance are constantly being monitored. That’s way, our clients can enjoy the scalability for any large tasks and blazing fast API responses.

Starting Price: $3 per 100,000 requests

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Factom Harmony Connect

Factom

Providing enterprise customers a blockchain-based data registry and verifiable credential model in order to make data and processes independently verifiable. With blockchain, you can create entries to prove that data existed in a certain state at a certain time. From that point on, anyone with access to the data can verify it against the blockchain version. Future changes to the data will show up like a sore thumb and can be detected quickly by any Connect-enabled system. The Factom blockchain creates immutable evidence by publishing timestamped evidence of your data and documents, preventing costly disputes. Evidence is preserved permanently on the Factom blockchain, ready to review whenever you need to prove validity. The Factom blockchain provides a strong public witness. As entries are agreed upon by the growing network of computers running the protocol, the witness to their proofs becomes irrefutable.

Starting Price: $100 per month

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Vezgo

Vezgo is an API for connecting to any crypto exchange, wallet, protocol or account. It's the #1 alternative to the discontinued Zabo API. Simplify your development and integrate end-user data from exchanges and blockchain directly into your JavaScript backend using the Vezgo SDK. Supporting exchanges, wallets and protocols takes months of design and development. Vezgo is one integration that can be completed in an afternoon. Vezgo is constantly adding support for new exchanges, wallets and protocols, which means you’ll always have the latest for your users. Vezgo normalizes and enhances the data with fiat values, and standardized transaction types. It makes every connection return the exact same data formatting, giving your application unmatched reliability and data consistency.

Starting Price: Free

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Transpose

Our REST API is built to support realtime use cases and handle massive parallelization - retrieving data like NFT Sales, ERC20 token balances and DEX swaps has never been easier. Our SDK lets you easily access all this data directly in your production environment in just a couple lines of code. Rapidly craft more complex queries and transformations for complete data ingestion flexibility. Join across tables to power more complex use cases like retrieving PnL leaderboards derived from NFT sales data, smart floor prices for a list of collections or the USD-equivalent balance of a wallet’s ERC20 holdings at any point in history. Serverless snippets that can integrate with external data sources and perform transformations that aren’t easily doable with direct SQL. Access Transpose directly from your frontend to power production UIs. Real time, ultra low latency queries let you get the data your customers need to them as fast as possible.

Starting Price: $99 per month

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BlockSpan

BlockSpan is an NFT API platform for software companies developing on the blockchain. We aggregate data from multiple chains and provide an API layer to allow NFT developers to retrieve token prices, current ownership, and metadata including cached images in real time. Supporting multiple blockchains, or switching chains, doesn't have to be difficult. You can stop scraping block logs and write a simple rest API integration instead. More than just transaction data, our API returns price, current owner, metadata, and more. Ethereum, Polygon, Arbitrum, and Optimism supported today, with more coming soon. We've written extensive documentation for each endpoint that includes an interactive API console. Our NFT API includes token metadata and cached image urls, saving making API and IPFS calls to fetch that data.

Starting Price: $49 per month

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NFTPort

Bring your NFT application to market in hours instead of months. We take care of the NFT infrastructure so you can focus on your application. Built by developers, for developers. Grasping Solidity, Web3.js, GraphQL, nodes, IPFS, etc. is hard, time-consuming and usually needs a team to cover all of the skills. Teams waste 25-50% of engineering resources managing nodes, developing indexers, etc. as they try to reinvent the wheel. Using heavily rate-limited, slow and incomplete APIs slow you down in an extremely competitive market, leading to losing users and revenue.

Starting Price: $49 per month

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OnFinality

OnFinality is a blockchain infrastructure platform that saves web3 builders time and makes their lives easier. OnFinality delivers scalable API endpoints for the biggest blockchain networks and empowers developers to automatically test, deploy, scale and monitor their own blockchain nodes in minutes. To date, OnFinality has served over 300 billion RPC requests across 70 networks including Polkadot, Ethereum, Moonbeam, Astar, Avalanche and Cosmos, and is continuously expanding these mission-critical services so developers can build the decentralised future, faster! Build Smarter with OnFinality.

Starting Price: $0 per user per month

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Blast

Solving Web3 reliability and performance issues by efficiently employing the resources of hundreds of third-party node providers combined with a state-of-the-art decentralized blockchain API platform and an improved user experience. Start building on the most relevant blockchain projects in the Web3 world. Aiming at providing one of the most resilient decentralized infrastructure services and the fastest response times in the industry, Blast is making use of clustering mechanisms and third-party node geographical distribution in order to help Web3 developers in getting their infrastructure needs covered easily and allow them to focus solely on the development of their applications. Scaling is simply done by allowing more Node providers into our network. Good node behavior is enforced within our protocol by performing periodic checks and applying coercive measures for nodes that underperform, like slashing staked tokens or exclusion from the network.

Starting Price: $50 per month

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Evercloud

Evercloud platform provides developers with products, APIs, and tools, that help build, test, and run applications on TVM-compatible networks (Everscale, The Open Network (TON), Venom, Gosh, etc). Rich and high availability APIs for TVM blockchains. From small to large businesses who don't want to manage their infrastructure. Enterprises and heavy-load DApps who want to have the best API performance with the ability to extend it with custom APIs. Evercloud is for those who want to run and maintain their own node with basic API. It's also for DApp and contract developers and testers, who want to test locally before testing on real networks. Robust GraphQL API that is shared by all the products provides a smooth development flow from local testing to staging and production. Evercloud provides TVM network developers with scalable GraphQL API endpoints. Create Evercloud project and start your communication with blockchain.

Starting Price: Free

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Nomics

We’re an API-first cryptoasset data company delivering professional-grade market data APIs to institutional crypto investors & exchanges. We offer products & services that allow funds, fintech apps, & exchanges to access clean, normalized & gapless primary source trade & order book data. To grow the decentralized financial system by making it accessible and understandable to data-driven investors. Index 95% of trade, order book, and on-chain transaction data available for tokenized assets (including security tokens; tokenized funds, indexes, derivatives, and REITs; and of course cryptocurrencies). We are concise, articulate, and always clear about what we are trying to do. We listen well and seek to understand before reacting, maintaining calm poise in stressful situations to draw out the clearest thinking. We provide candid feedback to colleagues, sharing information openly and proactively.

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Coinpath

Bitquery

Coinpath® is a set of blockchain money tracing APIs based on a sophisticated mathematical algorithm that can perform complex calculations between blockchain addresses to show the money flow. Coinpath® uses heuristics and machine learning to determine clusters, transaction flow, account balance, etc. Our Coinpath® APIs are the backbone of multiple blockchain investigation and compliance solutions. Coinpath® is a set of API endpoints to trace money for any source and destination, create money flow graphs, and aggregate transfers to addresses. You can determine the origin and destination of money, transaction amount, and flow path. Coinpath® depicts a clean data graph for money flow by analyzing wallet transactions and addresses and creates a clear path from funds’ origin to different crypto services and VASPs. Our blockchain forensics technology is useful in monitoring customer deposits and withdrawals for “tainted” coins involved in money laundering, terrorist funding,etc.

Starting Price: $249 per month

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SoChain

SoChain is a blockchain explorer that crypto users can use to explore the Bitcoin blockchain and other blockchains. SoChain also offers APIs. SoChain's fast blockchain API is the easiest, most cost-effective way to build applications on Bitcoin, Litecoin, Dogecoin, Zcash, and Dash. We also offer Test Networks for developers to get started in a sandbox environment. Currency is just the first application of the Blockchain, and there's alot more to come. We're helping you make the future happen. This API is fast, and free. If you'd like to see more features, or if you need an obscenely large number of API calls, talk to us. We're happy to help. Accessing the SoChain API is simple. Whichever programming language you use, you can call our REST API using any HTTP adapter. For accessing this API using Ruby or Ruby on Rails, we recommend using the HTTPClient gem.

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Zabo

Zabo is an API for connecting to any crypto exchange, wallet, protocol or account. In only a few hours your users can access a whole universe of cryptocurrency accounts completely whitelabeled into your app. Zabo's API reduces integration lead times by up to 80% while consuming a fraction of the engineering resources normally required. Supporting exchanges, wallets and protocols takes months of design and development. Zabo is one integration that can be completed in an afternoon. Zabo is constantly adding support for new exchanges, wallets and protocols, which means you’ll always have the latest for your users. Zabo makes every connection return the exact same data formatting, giving your application unmatched reliability and data consistency.

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1inch Developer Portal

1inch Limited

Powered by the 1inch Labs, the 1inch Developer Portal is a Web3 cloud SaaS (software as a service) platform offering multiple software services. The platform enables developers to improve their DeFi and Web3 solutions by combining various APIs and smart contracts developed by 1inch. These tools provide you with building blocks for creating fully functional dApps, wallets and other projects. These tools enable you to seamlessly integrate a wide range of DeFi services, such as real-time pricing, limit orders and portfolio overview, into your apps. Harness the versatility of the 1inch Developer Portal to build reliable and efficient solutions, catering to all of your users' needs and delivering an unparalleled decentralized finance experience. Currently, the 1inch Developer Portal features the following 1inch APIs: Swap, Balance, Transaction Gateway, Orderbook, Traces, Fusion, Spot Price, Token, Portfolio, NFT, Gas Price. Meanwhile, new innovative Web3 tools are constantly added.

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Best Free Blockchain APIs

Compare the Top Free Blockchain APIs as of June 2025

What are Free Blockchain APIs?

QuickNode

Venly

GetBlock

Tatum

Chainstack

Bitquery

Crypto APIs

Anyblock

Blockchair

InfStones

Infura

Kaleido

Alchemy

NOWNodes

Factom Harmony Connect

Vezgo

Transpose

BlockSpan

NFTPort

OnFinality

Blast

Evercloud

Nomics

Coinpath

SoChain

Zabo

1inch Developer Portal

Best Free Blockchain APIs

Compare the Top Free Blockchain APIs as of June 2025

What are Free Blockchain APIs?

QuickNode

Venly

GetBlock

Tatum

Chainstack

Bitquery

Crypto APIs

Anyblock

Blockchair

InfStones

Infura

Kaleido

Alchemy

NOWNodes

Factom Harmony Connect

Vezgo

Transpose

BlockSpan

NFTPort

OnFinality

Blast

Evercloud

Nomics

Coinpath

SoChain

Zabo

1inch Developer Portal

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