List of the Top 25 Free Blockchain APIs in 2025

QuickNode streamlines blockchain infrastructure for both large and small teams. It offers a rapid global API that provides immediate access to a variety of networks, including Ethereum, Solana, Bitcoin, Polygon, BSC, Fantom, Avalanche, Terra, Celo, Optimism, Arbitrum, Algorand, Harmony, and Gnosis (xDai). Users can retrieve chain data through JSON-RPC via HTTPS or WebSocket endpoints. Additionally, an analytics dashboard allows for usage monitoring, while fast deployment tools like one-click WebHooks enhance efficiency for smart contract events, NFT, and ERC20 token APIs. With thousands of nodes successfully launched and a reputation for reliability among leading blockchain projects and businesses, QuickNode has been a pivotal force in the growth of the blockchain ecosystem since its inception in 2017. Its commitment to innovation continues to empower developers and foster new opportunities within the space.

Venly is a provider of blockchain technology that develops innovative tools and products aimed at helping businesses harness the power of blockchain. We deliver a comprehensive technology stack that facilitates the transition of platforms, applications, and brands into the Web3 landscape. By offering marketplaces, wallets, and NFT solutions, we guide businesses in seamlessly adopting Web3 technology and engaging their customers. Our user-friendly solutions leverage a familiar Web2 interface, making the integration of blockchain straightforward for both developers and end-users. Venly actively promotes blockchain adoption by delivering dependable and accessible software solutions, ensuring that the technology is within reach for all. Our offerings encompass a variety of products, including: WALLET SOLUTIONS → Provide instant Web3 wallets for your user base. NFT TOOLS → Access a comprehensive toolkit for all your NFT needs. MARKETPLACE SOLUTIONS → Create an NFT marketplace designed for mainstream users. SHOPIFY NFT APP → Easily sell NFTs directly through your Shopify store. WEB3 GAMING TOOLKIT → Equip your game to be ready for the Web3 environment, enhancing player experiences. We strive to empower businesses to embrace this revolutionary technology confidently.

GetBlock is a Blockchain-as-a-Service (BaaS) platform that offers a quick and straightforward API connection to full nodes across more than 50 prominent blockchain platforms. Users can effortlessly request data from a node's chain without the need to configure it manually using JSON-RPC or REST protocols. This service caters perfectly to newcomers and emerging entrepreneurs, in addition to crypto developers and everyday users. It is particularly beneficial for individuals lacking the time or resources to maintain their own full node. To begin utilizing GetBlock, simply register for an account; upon doing so, you'll receive an API key along with the necessary information accessible through your dashboard. Moreover, the platform's user-friendly interface ensures a seamless experience for all users.

Our GraphQL APIs designed for decentralized exchanges (DEX) deliver real-time trading data from a variety of DEX protocols and numerous blockchain networks. Users can access trade information from platforms like Kyber, Uniswap, 0x, Balancer, PancakeSwap, and others, enabling them to extract valuable insights. By leveraging this DEX trade data, you have the opportunity to create visual charts, conduct advanced analytics, identify potential arbitrage opportunities, or engage in comprehensive DEX market research. Bitquery provides a robust suite of software solutions that adeptly parse, index, and consolidate blockchain data within a unified framework. Beyond just data management, it offers tailored market insights for specific projects while monitoring industry trends across different blockchain environments. This includes a thorough analysis of fund flows for compliance and investigative needs, facilitating the tracing of financial origins and destinations. Additionally, our APIs extend to analytics for Decentralized Finance (DeFi) protocols and support scientific research aimed at progressing blockchain technology. By utilizing these innovative tools, users can uncover new perspectives on the intricate nature of the blockchain ecosystem, enhancing their understanding of its dynamics. Such engagement can lead to more informed decision-making and strategic planning in the rapidly evolving blockchain space.

Discover the most user-friendly and rapid blockchain development platform available today. This all-in-one framework accommodates over 40 digital assets and blockchain protocols, featuring a single JavaScript SDK that seamlessly integrates with all of them. By incorporating any blockchain directly into your JavaScript backend, you can streamline your development process significantly. Additionally, WooCommerce empowers you to generate and trade NFTs directly from your WooCommerce site, with a plugin that is both free and simple to install within minutes. Benefit from an open-source key management system that protects your private keys and mnemonics, enabling you to sign transactions securely on your own premises. Moreover, a command line interface is provided for effortless interaction with various blockchains. Our infrastructure is accessible through a REST API, offering consistent commands across all compatible blockchains. With this platform, you can effortlessly create applications on any supported blockchain, even if you have no prior blockchain experience, enhancing accessibility for developers of all skill levels. Embrace the future of blockchain development with tools designed for efficiency and ease of use.

Chainstack provides a suite of APIs and software that empower countless businesses, regardless of their size, to develop, expand, and sustain blockchain applications effectively. Their APIs are designed with security in mind, featuring secure node connections and best practices for key management to ensure your data remains safe and under your control. You also have the capability to invite additional members to your network, allowing them to deploy their infrastructure effortlessly through user-friendly network management tools. With Chainstack, you can select and implement the blockchain protocol that meets your specific requirements, and it will remain unchanged for your use. Chainstack’s managed blockchain services simplify the processes of launching, joining, and scaling decentralized networks, making it accessible for users at all levels. The platform enables you to test out enterprise-grade tools and services with confidence before transitioning to a production environment. Additionally, ongoing monitoring and resource provisioning are provided to help you maintain optimal performance and efficiency. This comprehensive approach ensures that businesses can focus on innovation while relying on robust support from Chainstack.

Crypto APIs serves as a provider of blockchain infrastructure, simplifying the process of developing and managing solutions for Web 3. The company offers a comprehensive suite of products that encompasses Blockchain Data, Blockchain Events, Blockchain Automations, Blockchain Tools, Non-Custodial Wallets, and Market Data. By utilizing a single seamless integration, developers can access all these tools, enabling them to deploy over 100 endpoints from one provider with just one SDK. Their REST APIs are compatible with various blockchain mainnets and testnets, making them suitable for a wide range of applications, such as digital banks, exchanges, wallets, custodians, and lending products, among others. Notable companies, including Chainlink, Ledger, Nexo, PayPal, and Prime Trust, have already integrated Crypto APIs into their operations. Customers frequently praise the company's white glove support and robust features, describing their offerings as "reliable, effective, and fast." Furthermore, Crypto APIs holds an ISO/IEC 27001:2013 certification, which ensures that they adhere to the highest security standards and incorporate advanced encryption to safeguard customer data and digital assets. This commitment to security and efficiency continues to attract a growing number of businesses in the blockchain space.

The Blockchair API offers a wealth of information from 17 different blockchains for developers, researchers, and businesses alike. This robust API enables users to perform a variety of analytical functions such as filtering, sorting, and aggregating blockchain data while maintaining high availability. Pioneering in its approach, Blockchair stands out as the first blockchain explorer to unify multiple blockchains under a single search platform. In contrast to many other blockchain explorers and cryptocurrency firms, Blockchair prioritizes user privacy by not collecting or sharing personal data with external analytics or advertising networks. This commitment to data protection further establishes Blockchair as a trusted resource in the blockchain ecosystem.

InfStones, a prominent company within the Softbank portfolio, is a sophisticated Platform as a Service (PaaS) provider for blockchain infrastructure, operating out of the United States with the backing of notable venture capitalists. This organization has earned the confidence of leading blockchain enterprises worldwide, such as Binance, BitGo, CoinList, Circle, and several others. Committed to facilitating blockchain adoption and the development of Web3 applications, InfStones offers a robust node management platform coupled with a user-friendly API, designed for developers across the globe. Their platform has been tested in real-world scenarios, boasting support for over 15,000 nodes across more than 60 different blockchains. Known for its incredible reliability, speed, efficiency, security, and scalability, the infrastructure is tailored specifically for cross-chain DeFi, NFTs, GameFi, and decentralized application development. Developers leverage this AI-enhanced platform to seamlessly interact with more than 50 prominent blockchain protocols, continually redefining the landscape of global innovation. InfStones has established itself as a trusted partner for some of the largest players in the blockchain industry, emphasizing their pivotal role in the future of technology. By fostering an environment conducive to innovation, InfStones is paving the way for the next generation of digital solutions.

Infura provides exceptional infrastructure tailored to support the growth of your decentralized application as it adapts to increasing user demand. Our instant access APIs enable you to quickly integrate your application with ease. We support JSON-RPC through both HTTPS and WebSocket interfaces, which facilitate both request-based interactions and subscription connections. You can kickstart your experience with Infura by simply using one URL. Our dedicated team of professionals is available 24/7 to handle all network changes and upgrades, allowing you to focus on honing your application development skills. We are deeply committed to fostering a future powered by decentralized networks and protocols. Our infrastructure empowers developers, giving you the freedom to dedicate your efforts to innovation and creativity. Through the Infura dashboard, you can uncover valuable insights, add new applications, and much more. Should you need assistance or have questions, our lively community, real-time status page, and extensive documentation library are always at your disposal. Moreover, we take pride in cultivating a user-friendly atmosphere that promotes exploration, learning, and experimentation, ensuring that developers have the tools they need to succeed. This commitment to support and accessibility makes Infura an ideal partner for developers venturing into the decentralized space.

Anyblock offers a Software-as-a-Service (SaaS) solution that delivers Blockchain JSON-RPC access for various platforms including Bitcoin and Ethereum. Our blockchain API is designed for speed and dependability, with query responses typically under 100 milliseconds. We ensure optimal performance through load balancing across multiple nodes. For Ethereum clients, we support both Parity/OpenEthereum and Besu, providing exceptional customer service. Users can expect quick and personalized responses, along with technical guidance that includes code samples. Additionally, we offer comprehensive documentation that encompasses API details, tutorials, FAQs, and more, enabling users to navigate our services with ease. This extensive support structure is designed to enhance user experience and foster a deeper understanding of our offerings.

You have the ability to develop blockchain and digital asset solutions without needing to build everything from the ground up. By starting with a small-scale implementation, you can swiftly transition to full production. There is a wide selection of cloud services, hybrid deployment choices, geographical locations, protocols, and consensus mechanisms available at your fingertips. This user-friendly approach simplifies blockchain integration, enabling you to expedite the creation and launch of your decentralized applications (dApps). The platform features an intuitive interface designed to oversee every aspect of your blockchain networks and operating environments. Additionally, automated tools and workflows facilitate the scaling of your business network and the onboarding of new participants. Each participant is tasked with the management of their own key materials, data, and nodes, ensuring security and autonomy. You can effectively expand your network using either a single proxy operator or through distributed ownership among participants. Furthermore, the system allows you to oversee networks, memberships, users, and environments with ease, ensuring a seamless management experience. This comprehensive capability encourages innovation and growth in the blockchain space.

NOWNodes provides an all-encompassing Blockchain-as-a-Service platform that allows users to effortlessly access Full Nodes and Explorers via an API, accommodating more than 50 distinct blockchain networks. You have the flexibility to choose the most suitable node according to your needs and utilize various methods to connect. This allows you to concentrate on building wallets, exchanges, decentralized applications, and other projects, while we take care of the essential infrastructure. Our service features a strong framework that is not only efficient but also cost-effective and reliable. We uphold Service Quality Standards for all our partners to guarantee superior performance. Furthermore, we continuously monitor your nodes to ensure their performance and relevance are regularly evaluated. This commitment ensures that our clients enjoy scalability for large-scale projects and receive swift API responses, facilitating smooth development processes. With NOWNodes, you can explore innovative solutions without the complexities of managing the backend infrastructure, thus freeing you to focus entirely on your creative endeavors.

Businesses can take advantage of a blockchain-based data registry coupled with a verifiable credential system to guarantee that both data and operations undergo independent validation. By harnessing blockchain capabilities, companies can create entries that verify data was in a certain state at a specific time. Thus, authorized individuals can easily cross-check this information against the blockchain for authenticity. Changes to the data are readily apparent and can be swiftly detected by any system that has Connect functionality integrated. The Factom blockchain provides an immutable record by securely archiving timestamped evidence of data and files, which helps to prevent costly disputes. This information is permanently recorded on the Factom blockchain, making it accessible for examination whenever verification is needed. Serving as a solid public witness, the Factom blockchain ensures that entries are authenticated by a growing network of computers running the protocol, thereby affirming the reliability of their proofs. This capability not only boosts confidence in the integrity of the data but also cultivates trust among all parties involved in the process. Additionally, the transparency and security offered by blockchain technology can lead to improved collaboration and communication among stakeholders.

WatchData provides straightforward and reliable API access to the Ethereum blockchain, making it a valuable resource for developers. Noteworthy advantages of utilizing WatchData include its unwavering data consistency, uninterrupted connectivity, and the capacity to automate tasks effectively. Furthermore, it accommodates high usage thresholds to serve a wide range of users and ensures compatibility with various nodes. The platform also offers resource scaling options and boasts impressive processing speeds, significantly improving the user experience. With these compelling features, WatchData stands out as a top option for individuals seeking strong blockchain solutions, particularly in a rapidly evolving digital landscape.

Vezgo provides a single API that connects with all Digital Assets seamlessly. Whether you're looking to access information from Centralized Exchanges, Decentralized Wallets, NFTs, or the Blockchain, Vezgo's API enables straightforward integration for your users to link their Web3 accounts effortlessly. Acting as a bridge, Vezgo translates Web2 data into applicable solutions for your Web2 needs. This user-friendly API not only consolidates but also aggregates your users' complete balances, positions, and transactions into a coherent and standardized dataset, which can be easily utilized in your current Web2 applications. By simplifying the process, Vezgo empowers developers to enhance their services and enrich user experiences in the evolving digital landscape.

Our REST API is crafted to support real-time applications while adeptly handling extensive parallel processing, which simplifies tasks like retrieving NFT sales data, ERC20 token balances, and DEX swaps. By utilizing our SDK, you can effortlessly integrate this information into your production environment with minimal coding. This allows for the rapid development of more complex queries and transformations, providing complete freedom in data ingestion. The ability to join multiple tables allows you to address advanced use cases, such as calculating PnL leaderboards from NFT sales data, determining optimal floor prices for various collections, or evaluating the USD-equivalent balance of a wallet's ERC20 assets at any given historical point. In addition, our serverless snippets facilitate connections to external data sources and enable transformations that might not be achievable through conventional SQL queries. Accessing Transpose directly from your frontend empowers you to significantly enhance production UIs. With real-time capabilities and extremely low latency queries, you can provide your clients with essential data as quickly as possible, ensuring they receive the latest information at their fingertips. This impressive array of features not only optimizes your applications but also equips you to meet the evolving needs of modern users with exceptional efficiency and responsiveness. Additionally, the versatility and power of our API further streamline the development process, enabling quicker deployment of innovative solutions.

Launch your NFT application in mere hours instead of the typical months it takes, as we tackle the intricate NFT infrastructure so you can prioritize refining your application. Tailored specifically for developers by individuals who comprehend their challenges, our service alleviates the burdens of mastering complex technologies like Solidity, Web3.js, GraphQL, nodes, and IPFS. Many development teams often find that 25-50% of their engineering resources are squandered on managing nodes and creating indexers, which only replicate existing solutions. Furthermore, dependence on slow and heavily rate-limited APIs can hinder your advancement in a competitive market, threatening both user loyalty and revenue streams. By simplifying these daunting tasks, we enable you to channel your efforts into innovation and expansion, ensuring your project thrives in today’s fast-paced environment. This approach not only saves time but also enhances productivity, allowing for a more agile response to market demands.

OnFinality serves as a comprehensive blockchain infrastructure platform that streamlines the development process for web3 builders, ultimately saving them valuable time and simplifying their workflows. With scalable API endpoints tailored for major blockchain networks, OnFinality enables developers to effortlessly automate the testing, deployment, scaling, and monitoring of their blockchain nodes in just a few minutes. Having successfully managed over 300 billion RPC requests across 70 different networks, which encompass well-known platforms like Polkadot, Ethereum, Moonbeam, and Astar, OnFinality is continuously enhancing its essential services for developers. This relentless expansion allows creators to accelerate their efforts in shaping a decentralized future. By leveraging OnFinality, you gain a smarter approach to blockchain development and innovation.

The Evercloud platform presents a variety of products, APIs, and tools specifically designed for developers who are creating, testing, and deploying applications on TVM-compatible networks such as Everscale, The Open Network (TON), Venom, and Gosh. It boasts a set of comprehensive and highly available APIs tailored for TVM blockchains, making it suitable for businesses of all sizes that prefer to avoid managing their own infrastructure. Enterprises and decentralized applications (DApps) that require significant resources can take advantage of optimal API performance, along with the ability to enhance the system by adding custom APIs. For those interested in operating their own node, Evercloud also provides basic API access, ensuring accessibility for a wider range of users. Moreover, it stands out as a prime option for DApp and contract developers, as well as testers looking to run local tests before transitioning to actual networks. With a robust GraphQL API that is consistently implemented across all offerings, Evercloud guarantees a smooth development journey from local testing to staging and production setups. Developers working within TVM networks benefit from scalable GraphQL API endpoints, which facilitate efficient project creation and blockchain interactions, thereby streamlining the overall development process. This platform not only empowers users to innovate effortlessly, but also ensures they maintain complete control over their development workflow, fostering a creative environment where ideas can flourish. Overall, the versatility and efficiency of Evercloud make it a dynamic resource for modern application development.

We are a data-driven firm that adopts an API-first methodology for cryptoassets, concentrating on offering superior market data APIs specifically designed for institutional investors and exchanges operating within the cryptocurrency sector. Our range of products and services allows funds, fintech applications, and exchanges to acquire immaculate, standardized, and continuous primary source trade and order book data. Our goal is to foster the growth of the decentralized financial ecosystem by making it more user-friendly and understandable for data-oriented investors. We aspire to index 95% of the existing trade, order book, and on-chain transaction data related to tokenized assets, which includes security tokens, tokenized funds, indexes, derivatives, real estate investment trusts (REITs), and cryptocurrencies. We communicate in a succinct and straightforward manner to ensure our aims are clearly articulated. By valuing active listening, we work to fully understand before engaging in dialogue, maintaining a calm presence even under pressure, which aids in achieving clearer insights. Furthermore, we are dedicated to providing constructive feedback to our team members, promoting a culture of transparency and proactive sharing of information. This strategy not only enhances our collaborative efforts but also fortifies the cohesion and effectiveness of our team, leading to innovative solutions in a rapidly evolving market.

Coinpath® is an all-encompassing suite of APIs crafted for the purpose of tracing blockchain transactions, employing sophisticated mathematical algorithms to scrutinize the flow of funds across different blockchain addresses. Utilizing a combination of heuristics and machine learning methods, Coinpath® proficiently uncovers clusters, tracks transaction patterns, and evaluates account balances. These APIs are vital for a broad range of blockchain investigation and compliance tasks. With Coinpath®, users have the ability to follow the financial movement between specified sources and destinations, create visual depictions of monetary flows, and aggregate transfers directed to particular addresses. This tool facilitates the identification of both the origin and destination of transactions, while also providing detailed insights into transaction amounts and routes taken. Furthermore, Coinpath® produces a visually coherent data graph that delineates the fund flow by analyzing wallet transactions and their related addresses, effectively mapping the trajectory of money from its source to various cryptocurrency services and Virtual Asset Service Providers (VASPs). This innovative blockchain forensic technology is crucial in monitoring customer deposits and withdrawals, especially when it comes to detecting "tainted" coins associated with illegal activities, including money laundering and terrorist financing, thereby improving financial security. In essence, Coinpath® not only supports compliance initiatives but also bolsters the overall reliability of blockchain transactions, making it an invaluable tool for businesses and investigators alike.

A single line of code can significantly enhance your development journey with the most powerful blockchain developer platform, which is trusted by 70% of the top Ethereum applications globally. Alchemy Supernode distinguishes itself as the leading Ethereum API, providing all the core functionalities of a node, including JSON-RPC support, while ensuring exceptional reliability, data precision, and scalability that are essential for building high-quality blockchain applications. With Alchemy Build, developers benefit from an intuitive, no-setup-required toolkit that allows for rapid prototyping, debugging, and product launch. Effortlessly navigate through millions of historical requests, track live transactions in the mempool, perform JSON-RPC calls directly from the dashboard, and quickly pinpoint recent requests along with any errors that may have occurred. Alchemy Monitor further enriches this experience by offering a comprehensive suite of dashboards and alerts that focus on application health, performance metrics, and user interactions. You can conveniently evaluate the status of all your applications in one unified platform, gain insightful user analytics while ensuring their privacy, and receive timely notifications regarding significant changes. This formidable collection of tools empowers developers to efficiently create and oversee successful blockchain initiatives, making them more competitive in the fast-evolving digital landscape. Ultimately, Alchemy's offerings enable teams to innovate without the constraints that typically hinder progress in blockchain development.

SoChain operates as a versatile blockchain explorer, enabling cryptocurrency enthusiasts to navigate the Bitcoin blockchain as well as a variety of other blockchains. Beyond just exploration, SoChain offers robust APIs that support development initiatives. Notably, their rapid blockchain API is both cost-effective and user-friendly, making it ideal for building applications that work with Bitcoin, Litecoin, Dogecoin, Zcash, and Dash. Additionally, for developers, SoChain provides Test Networks, which serve as a controlled environment for experimentation and innovation. While cryptocurrency transactions are the most well-known use of blockchain technology, the possibilities for future advancements are immense. SoChain is committed to empowering its users to influence the evolution of blockchain technology. This API not only boasts impressive speed but is also accessible at no cost. If you need extra features or anticipate making a high volume of API calls, please reach out—we are eager to help. Accessing the SoChain API is a straightforward process, and you can interact with our REST API using any HTTP adapter, regardless of your chosen programming language. For those working with Ruby or Ruby on Rails, we recommend using the HTTPClient gem for a seamless integration experience, ensuring developers have all the necessary tools at their disposal for a productive development journey. Furthermore, SoChain is constantly evolving to meet the needs of the blockchain community, making it a reliable choice for both new and seasoned developers.

Zabo functions as an API that enables effortless connection to any cryptocurrency exchange, wallet, protocol, or account. With just a few hours of implementation, your users can gain access to a wide array of cryptocurrency accounts that are smoothly integrated into your application. Leveraging Zabo's API can reduce integration times by up to 80%, while requiring significantly fewer engineering resources compared to conventional approaches. Usually, the endeavor of accommodating multiple exchanges, wallets, and protocols can take many months, but Zabo allows for full integration in a mere afternoon. Additionally, Zabo is consistently updating its support for new exchanges, wallets, and protocols, ensuring that users always have access to cutting-edge options. One of the standout features of Zabo is its capability to provide uniform data formatting across all connections, which assures your application of outstanding reliability and consistency in data management. This not only improves the overall user experience but also simplifies the development process for your team, making it an indispensable resource in the rapidly changing landscape of cryptocurrency. Ultimately, Zabo positions itself as a key partner in facilitating the growth and adaptability of crypto-focused applications.