Arbitrum (ARB) nodes and RPC explorer

NOWNodes as Arbitrum (ARB) node provider ensures fast RPC access, low-latency performance, and scalable infrastructure for seamless Web3 development.

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Products

Networks

Mainnet

API Tools

Advanced API tools

Advanced APIs for Arbitrum and all supported networks — from real-time WebSocket streams to deep historical and indexed data.

Real-time WebSocket access on supported networks.
Subscribe to new blocks, transactions, and events without polling.

Access full blockchain history on supported networks.
Query historical states and logs beyond pruned node limits.

Advanced tracing and debugging methods on supported networks.
Inspect transactions, internal calls, and execution paths.

High-level indexed blockchain data via a unified API. Access addresses, transactions, balances, and blocks without raw RPC calls.

Flexible Arbitrum API infrastructure

Clear pricing and shared infrastructure with no hidden limits or unexpected restrictions for Arbitrum.

No RPS limits

There are no predefined RPS limits on paid plans. Throughput scales dynamically based on cluster capacity, without artificial throttling.

Flexible pricing

Plans for different budgets — from shared access to dedicated nodes. Combine tariffs to optimize costs without sacrificing performance.

Geo-balanced infrastructure

Requests are served through geo-distributed, load-balanced node clusters. Automatic failover maintains availability if nodes go offline.

120+ Blockchains

One RPC provider — 120+ blockchains. We regularly add new chains, including by request from our users. Check out our crypto node list.

99,95% Uptime

Reliable performance under any load — with smart load balancing. We ensure stable performance and deliver on our SLA.

24/7 Suport

Our support team consists of experienced technical experts. With a clear SLA, we guarantee help, with first responses in under 3 minutes.

Production starts here

Focus on your product — we handle Arbitrum maintenance, scaling and availability.

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FAQ

What is a Arbitrum node provider?

Arbitrum Node providers deliver managed crypto nodes and reliable infrastructure — giving developers instant access to the blockchain without the burden of running and maintaining their own servers. Instead of dealing with complex synchronization, heavy storage requirements, and ongoing maintenance, teams can get started immediately using high-performance hosted endpoints.

What is a Arbitrum RPC node?

A Arbitrum Node provides full blockchain access through Remote Procedure Call (RPC) endpoints. These RPC endpoints allow developers to interact with the network programmatically — sending transactions, fetching block and transaction data, querying addresses, and monitoring real-time network activity. In production environments, RPC access is the standard way most applications connect to blockchain nodes.

Do I need to run my own Arbitrum node?

Running your own Arbitrum node is not necessary for most projects. Operating a node requires storage capacity, constant synchronization, security monitoring, and dedicated DevOps resources. These requirements often make self-hosted nodes costly and time consuming, particularly as your project grows.

What Arbitrum APIs does NOWNodes support?

NOWNodes supports several Arbitrum APIs and infrastructure options, including Arbitrum RPC APIs, BlockBook APIs, and BlockBook WSS APIs on Mainnet. Developers can use these APIs to access blockchain and wallet data, retrieve transaction details, monitor balances, stream real-time blockchain events through WebSockets, and build wallets, DeFi applications, explorers, and other scalable Web3 services on Arbitrum infrastructure.

You can try the interfaces even before purchasing our API through Testnet. There is a whole nodelist of our service https://nownodes.io/nodes.

How do I start using a Arbitrum node?

After login in NOWNodes and selecting a plan you need to navigate to the Dashboard in your account and scroll down the page. There you will see the button Add a New Key. Just push the button and your API key will be ready to use.

Can I get a free Arbitrum node?

Yes, you can start with our START plan that gives access to shared crypto nodes with 100,000 requests for one month.