Find the best APIs for building on Arbitrum. Compare RPC endpoints, data APIs, and infrastructure providers.
Arbitrum is the leading Ethereum L2 with massive TVL. Choose the right API provider for your dApp, DEX, or DeFi project.
Enterprise-grade infrastructure with best developer experience
High-performance global network with 30+ chains
Proven reliability with ConsenSys backing
| Provider | RPC URL | Chain ID | Status |
|---|---|---|---|
| Arbitrum (Official) | https://arb1.arbitrum.io/rpc | 42161 | Recommended |
| Public RPC | https://rpc.ankr.com/arbitrum | 42161 | Free |
| Cloudflare | https://arb1.arbitrum.io/rpc | 42161 | Official |
Arbitrum's official RPC (arb1.arbitrum.io/rpc) is free and reliable for development. For production, use Alchemy or QuickNode for better performance and reliability.
Sign up for Alchemy, create an app on Arbitrum, copy your new API URL, and replace the endpoint in your code. Most SDKs work with both providers without code changes.
Arbitrum One is the main L2 for general dApps with full EVM compatibility. Nova is optimized for gaming and social apps with lower fees but different data availability.