List of the Top 5 Blockchain APIs for Unichain 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.

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.

A groundbreaking approach to cross-chain interactions that effortlessly links users to various applications has emerged. This innovation offers end-users access to the quickest and most economical bridging options, while developers enjoy a more efficient interoperability process. Cross-chain Intents serve as both a limit order and an action to be performed, effectively substituting explicit steps with desired user outcomes. This shift enables relayers to compete for optimal execution paths, enhancing efficiency. In contrast to intricate trusted messaging frameworks, Across facilitates connections between users and dapps via intents, rather than merely bridging different blockchains. For developers, incorporating a standard action into protocol operations is all that is required to deliver fluid experiences across multiple chains. Ultimately, this new model not only simplifies user interactions but also fosters innovation in the development of cross-chain applications.

Etherscan is recognized as the leading Blockchain Explorer, search tool, API, and analytics platform tailored for Ethereum, a decentralized platform that facilitates smart contracts. Founded in 2015, it has been one of the earliest and most resilient independent initiatives focused on Ethereum and its surrounding ecosystem, striving to provide equitable access to blockchain data for all users. This dedication to openness and user-friendliness has reinforced its standing in the cryptocurrency community, making it an invaluable resource for those seeking to navigate the complexities of blockchain technology. Etherscan continues to evolve, adapting to the changing landscape of Ethereum and enhancing its features to better serve its growing user base.

APIs play a crucial role in shaping a vibrant decentralized future, and The Graph stands out as a groundbreaking indexing protocol that enables efficient querying of networks like Ethereum and IPFS. This platform empowers individuals to create and disseminate open APIs, referred to as subgraphs, which significantly improve data accessibility. These interconnected subgraphs can collectively form a vast global graph that encapsulates all publicly available information worldwide. Consequently, data can be transformed, organized, and leveraged across numerous applications, allowing users to retrieve the information they need with ease and minimal effort. Before The Graph's introduction, development teams were burdened with the task of constructing and maintaining proprietary indexing servers, a labor-intensive process that required considerable engineering skills and hardware resources, ultimately jeopardizing the vital security features essential for genuine decentralization. This advancement in data management not only simplifies access but also encourages collaboration and innovation within the decentralized landscape. Moreover, by alleviating the technical burdens placed on developers, The Graph fosters an environment where creativity can flourish, leading to a more robust and interconnected ecosystem.