Block Explorer for Arbitrum Sepolia Testnet
Ethernal is a hosted block explorer for Arbitrum Sepolia, the official testnet for Arbitrum's Nitro stack. Get transaction decoding, contract verification, retryable ticket tracing, and a built-in faucet for your Arbitrum Sepolia development environment.
Chain ID 421614Orbit Bridge Monitoring on Testnet
Arbitrum Sepolia (chain ID 421614) runs the same Nitro stack as Arbitrum One mainnet. Ethernal monitors your testnet Rollup and Inbox contracts, tracks L1-to-L2 retryable tickets, and follows assertion postings. Test your bridge integration in a staging environment before going to mainnet.
Request testnet ETH for development
Built-in Testnet Faucet
The Ethernal Starter plan (free) includes a built-in testnet faucet. Visitors can request test ETH directly from your Arbitrum Sepolia explorer page. No need to set up a separate faucet service or deal with third-party rate limits.
Explorer Features
How to Set Up an Arbitrum Sepolia Block Explorer
Create a workspace
Sign up at app.tryethernal.com and create a new workspace.
Connect Arbitrum Sepolia RPC
Paste the Arbitrum Sepolia RPC endpoint: https://sepolia-rollup.arbitrum.io/rpc or use a provider like Alchemy or QuickNode.
Configure Orbit bridge (optional)
Enter the testnet Rollup and Inbox contract addresses to enable retryable ticket tracking and assertion monitoring. Uses Sepolia L1 as the parent chain.
Start exploring
Your Arbitrum Sepolia explorer is live. Blocks, transactions, and contracts are indexed automatically. Use the built-in faucet and verify contracts.
Pricing for Arbitrum Sepolia Explorers
The Starter plan (free) is often all you need for an Arbitrum Sepolia testnet explorer. It includes contract verification, token tracking, a built-in faucet, and unlimited transactions. For custom domains and branding, the Team plan starts at $150/month. Full whitelabel is $500/month on the App Chain plan.
View Full PricingFrequently Asked Questions
How do I set up a block explorer for Arbitrum Sepolia?
Create a free workspace on Ethernal, paste the Arbitrum Sepolia RPC endpoint (https://sepolia-rollup.arbitrum.io/rpc), and optionally configure Orbit bridge addresses. Your explorer is live in minutes.
What is the chain ID for Arbitrum Sepolia?
Arbitrum Sepolia uses chain ID 421614. It settles on the Sepolia testnet (chain ID 11155111) and runs the same Nitro stack as Arbitrum One mainnet (chain ID 42161).
Does Ethernal support Orbit bridge features on Arbitrum Sepolia?
Yes. Configure your testnet Rollup and Inbox contract addresses and Ethernal will track retryable tickets, assertion postings, and L1-to-L2 message delivery on Arbitrum Sepolia.
Can I get free Arbitrum Sepolia ETH through Ethernal?
Yes. The Ethernal Starter plan includes a built-in testnet faucet. Users can request test ETH directly from your explorer page without a separate faucet.
Can I use the same Ethernal setup for Arbitrum One mainnet?
Yes. The configuration is identical. When you are ready to go to production, update your RPC URL from Arbitrum Sepolia to Arbitrum One and swap the bridge contract addresses. Everything else carries over.
Ready to launch your explorer?
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