Best Blockchain APIs for Ethereum

Blockdaemon

Blockdaemon is the institutional gateway to Web3, securing over $110B in digital assets for 400+ institutions, including exchanges, custodians, crypto platforms, and financial enterprises. We offer institutional-grade blockchain infrastructure spanning nodes, APIs, DeFi, staking, MPC wallets and vaults. Since 2017, our globally distributed infrastructure ensures unrivaled security, compliance, and scalability.

2 Ratings

Starting Price: $0/month

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Coinbase

Coinbase is the easiest place to buy, sell, and manage your cryptocurrency portfolio. Jump start your crypto portfolio with $30 in free Bitcoin after you sign up and make a $20 purchase. Terms apply. Discover how specific cryptocurrencies work — and get a bit of each crypto to try out for yourself. Coinbase has a variety of features that make it the best place to start trading. Buy and sell popular digital currencies, keep track of them in the one place. Invest in cryptocurrency slowly over time by scheduling buys daily, weekly, or monthly. For added security, store your funds in a vault with time delayed withdrawals. Stay on top of the markets with the Coinbase app for Android or iOS. We store the vast majority of the digital assets in secure offline storage. Cryptocurrency stored on our servers is covered by our insurance policy. Coinbase supports a variety of the most popular digital currencies.

10 Ratings

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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.

40 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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Ethplorer

Portfolio tracking, address and transactions tags and notes, watch service notifications, and crypto accounting. Track address portfolios for any Ethereum address with comprehensive balance charts and transactions. View balances, trading volumes, operations and transfers per token, per day. Tag and note any transaction, address, or even tokens. Use it as an easy tool for your crypto accounting with no registration required. Export the transaction history for any address tags /notes as a CSV file with historical prices. Explore marketing possibilities with token API and display widgets. Track an infinite number of Ethereum addresses and tokens, with industry-first Bulk API monitor. An all-in-one platform for the world of the Ethereum blockchain. View historical balances of holdings in USD. Receive email or telegram updates for any incoming or outgoing transaction from any address with watching service.

1 Rating

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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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NOWNodes

NOWNodes is a reliable RPC service provider offering seamless access to both Full and Archive Nodes via API. Supporting over 110 blockchain networks, NOWNodes delivers multiple interface options such as Tendermint, Blockbook, Index, and others—available across mainnets and testnets depending on the specific blockchain. The platform stands out for its fast, cost-efficient, and dependable infrastructure. With 99.95% uptime, the ability to handle over 15,000 transactions per second, and an average response time of approximately 0.6 seconds, NOWNodes ensures continuous, secure access to blockchain data.

Starting Price: €20

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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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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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WatchData

WatchData provides simple and reliable API access to Ethereum blockchain. Among the advantages offered by WatchData are: - Data reliability - Uninterrupted connection with no downtime - Process automation - High limits that suit any user - Support for various nodes - Resource scaling -High processing speeds

Starting Price: $72 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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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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RPC Fast

If you are spending $2+K on a blockchain API infrastructure and sending hundreds of requests per second, you might be interested in cost optimization. And that is where we can help by providing you the fastest access to blockchain infrastructure through JSON-RPC endpoint on your own secure environment. Why RPC Fast, a self-hosted cluster with geo-distributed blockchain nodes, can be helpful in your case? - Ultra-speedy geo-distributed infrastructure with 90+ zones available and 100% healthy nodes. - 99.99% uptime and average 85.6 millisecond latency from just about anywhere. - PredictKube under the hood, an AI model trained to predict the traffic trend and autoscale infrastructure capacities accordingly, based on your historical data and business metrics. - A self-hosted solution, that will insure maximum security for your blockchain infrastructure.

Starting Price: $0

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Across Protocol

Across offers high speed, low fee interoperability solutions powered by intents. Intents is proving to be a winning solution, as Across dominates the routes its supports, frequently able to provide the cheapest and fastest bridge option. Across' unique value is that it guarantees genuine, not synthetic, assets are transferred cross-chain. With an Across integration, dapps and blockchains are able to provide their users with best-execution cross-chain settlement, without security tradeoffs. Across Protocol offers three products built on a modular, intents-based framework. Across Bridge, which offers high speed, low fee token bridging. Across+, a free chain abstraction tool that allows dapps to onboard users, from any chain, in seconds, for cents. Lastly, Across Settlement, which is a settlement layer that dapps can plug into, to execute intents-based order flow. The future of interoperability are intents, and Across is leading its execution.

Starting Price: $0

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Amazon Managed Blockchain

Amazon

Amazon Managed Blockchain is a fully managed service that makes it easy to create and manage scalable blockchain networks using the popular open source frameworks Hyperledger Fabric and Ethereum*. Blockchain makes it possible to build applications where multiple parties can execute transactions without the need for a trusted, central authority. Today, building a scalable blockchain network with existing technologies is complex to set up and hard to manage. To create a blockchain network, each network member needs to manually provision hardware, install software, create and manage certificates for access control, and configure networking components. Amazon Managed Blockchain can easily scale your blockchain network as the usage of applications on the network grows over time. When a network member requires additional capacity for creating and validating transactions, the member can quickly add a new peer node using Managed Blockchain's APIs.

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Covalent

Our vision is to empower the pioneers of tomorrow by providing the richest and most robust data infrastructure for the entire blockchain ecosystem. Explore and contribute to the absolute richest blockchain data on the internet. Aggregate historical balances, positions and PnL across dozens of DeFi protocols to build rich and compelling interfaces for your users. Build analytical dashboards showing price trends, liquidity and ROI of assets. Explore our quick start tutorials, how-to guides, example code, and more to easily integrate blockchain data in your project using the Covalent API. Covalent provides a unified API to bring full transparency and visibility to assets across all blockchain networks. Simply put, we have a single API which allows you to pull detailed, granular blockchain transaction data from multiple blockchains with no code.

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Etherscan

Etherscan is the leading Blockchain Explorer, Search, API and Analytics Platform for Ethereum, a decentralized smart contracts platform. Built and launched in 2015 it is one of the earliest and longest running independent project built around Ethereum and its community with the mission of providing equitable access to blockchain data.

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BlockCypher

Our architecture allows us to run in multiple data centers for redundancy and low-latency. Simple and easy web APIs (REST) enable developers to build blockchain applications quickly and confidently. Our modular, cloud-optimized architecture is enterprise-grade for scalability, performance and reliability. We maintain a cluster of distributed databases which contain all transactional data for the entire blockchain. We host full-node blockchains for optimal security in validating and relaying transactions.Our focus is to make our customers successful as they build their next-generation blockchain applications. BlockCypher quickly identifies fraud and transactions likely to confirm.

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Bloq

Bloq’s expanding suite of infrastructure services is a powerful resource for building on multiple blockchains — providing the foundation for cryptocurrency business, de-risking the development process, and scaling as the best ideas grow. BloqConnect accelerates development with APIs, delivering real-time connectivity to leading blockchain networks, as well as indexed data, and additional services. BloqNodes can spin up private, fully-managed clusters of nodes, ensuring the powerful fault-tolerant data foundation that the blockchain industry demands. BloqStake provides solutions for Proof-of-Stake protocols and the enterprises that support them to offer rewards for staking and securing your favorite protocols. Deliver vital infrastructure for your ecosystem, allowing it to build groundbreaking new applications, scale quickly, and explore synergies alongside leading blockchain protocols.

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web3.js

web3.js is a collection of libraries that allow you to interact with a local or remote ethereum node using HTTP, IPC or WebSocket. A Bloom filter is a probabilistic, space-efficient data structure used for fast checks of set membership. That probably doesn’t mean much to you yet, and so let’s explore how bloom filters might be used. Imagine that we have some large set of data, and we want to be able to quickly test if some element is currently in that set. The naive way of checking might be to query the set to see if our element is in there. That’s probably fine if our data set is relatively small. Unfortunately, if our data set is really big, this search might take a while. Luckily, we have tricks to speed things up in the ethereum world!

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Stocra

Cryptocurrency API to access transaction data from multiple blockchains in uniform format. With Stocra you can read transactions from Bitcoin, Ethereum (including ERC-20 transfers), Cardano, Dogecoin, Litecoin and Aptos blockchains and get responses in the same format. No more blockchain specific parsers!

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Sequence

We started architecting Sequence in January 2018 to empower our team and solve our needs at Horizon, the parent company behind Sequence. The Sequence platform powers all Horizon's products: Skyweaver, which some call "the best blockchain game"; and Niftyswap, the decentralized marketplace for web3 collectibles. Users can access Sequence from anywhere: desktop, mobile, or tablet. Developers can embed Sequence on any screen, game, or dapp. Collectibles automatically display with artwork and metadata. Perfect for viewing and trading. DAZN Boxing, from global sports entertainment platform DAZN, uses Sequence Wallet to onboard users to web3 and its NFT collections. Query all token and NFT balances, history, metadata, and market prices on many EVM chains. Mint collections and airdrop tokens to your community quickly and easily.

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Chain49

Hartmann IT Solutions GmbH

Kickstart your next blockchain project with Chain49! We provide access to our network of blockchain full nodes located in Germany via JSON-RPC, WebSocket and a shared API based on battle-tested indexer Blockbook. We support the most popular blockchains like Bitcoin, Ethereum, BNB Smart Chain and more! By using our services, you can save a lot of time and money spent on setting up your own blockchain infrastructure and just focus on developing your idea. Dedicated nodes and custom setups are also available from over 50 different blockchains for the highest load requirements without any rate limits. Contact us for a free consultation today or register for a free key and start building awesome things!

Starting Price: €49/month

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Best Blockchain APIs for Ethereum

Compare the Top Blockchain APIs that integrate with Ethereum as of October 2025

What are Blockchain APIs for Ethereum?

Blockdaemon

Coinbase

QuickNode

Venly

GetBlock

Ethplorer

Crypto APIs

Anyblock

NOWNodes

Blockchair

InfStones

Kaleido

Alchemy

WatchData

BlockSpan

NFTPort

OnFinality

Blast

Coinpath

RPC Fast

Across Protocol

Amazon Managed Blockchain

Covalent

Etherscan

BlockCypher

Bloq

web3.js

Stocra

Sequence

Chain49

Best Blockchain APIs for Ethereum

Compare the Top Blockchain APIs that integrate with Ethereum as of October 2025

What are Blockchain APIs for Ethereum?

Blockdaemon

Coinbase

QuickNode

Venly

GetBlock

Ethplorer

Crypto APIs

Anyblock

NOWNodes

Blockchair

InfStones

Kaleido

Alchemy

WatchData

BlockSpan

NFTPort

OnFinality

Blast

Coinpath

RPC Fast

Across Protocol

Amazon Managed Blockchain

Covalent

Etherscan

BlockCypher

Bloq

web3.js

Stocra

Sequence

Chain49

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