Arbitrum Sepolia Faucet: How to Claim Free Testnet ETH
Updated October 22, 2026 · Spectrum Nodes
Short answer: The Spectrum Nodes Arbitrum Sepolia faucet sends you 0.1 free testnet ETH every 24 hours. Follow @SpectrumNodes on X, publish the prefilled post from the faucet page, then paste the post's URL and your wallet address, agree to the T&C and click Claim. The ETH arrives within seconds, ready to deploy and test contracts before you ship to Arbitrum One.
What Is the Spectrum Arbitrum Sepolia Faucet?
The Arbitrum Sepolia faucet is a free Spectrum Nodes service that drips 0.1 ETH every 24 hours to your testnet wallet. A testnet faucet sends test tokens that pay gas on a testnet, so you build without spending mainnet funds. Arbitrum Sepolia is the testnet for Arbitrum, the Ethereum layer 2 built on the Nitro stack. Use the ETH to deploy contracts, test dApps and infrastructure, interact with the Ethereum ecosystem and try Arbitrum's performance.
How Do I Claim Free Arbitrum Sepolia ETH?
You need an X account and a wallet address. The claim takes six steps:
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Follow Spectrum on X. Follow @SpectrumNodes on X.
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Post the tweet. Click the "Post" button on the faucet page. X opens with a prefilled post, ready to publish from your account.
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Paste your post's URL. Once your X post is live, paste its URL link into the faucet.
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Enter your wallet address. This is where the testnet ETH goes.
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Accept the terms. Confirm that you agree to Spectrum's T&C.
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Click Claim. Your tokens are sent to you within seconds.
What Is the Arbitrum Sepolia Chain ID?
Arbitrum Sepolia uses chain ID 421614 (hex 0x66eee). Add it to your wallet or app config with that ID, and check transactions on the sepolia.arbiscan.io block explorer.
| Network | Chain ID | Hex | Explorer |
|---|---|---|---|
| Arbitrum Sepolia | 421614 | 0x66eee | sepolia.arbiscan.io |
How Do I Get a Free Arbitrum Sepolia Testnet RPC?
An RPC endpoint is the URL your wallet or app uses to read from a chain and send transactions to it. In the Spectrum dashboard, pick the chain, choose mainnet or testnet and a pruned or archive node, and you get RPC and WebSocket URLs for each region. Spectrum covers 200+ chains, including testnets, and has a Free plan. Not every chain is on the Free tier, so check Arbitrum Sepolia in the dashboard or on our networks page before you build on it.
Which Other Testnet Faucets Does Spectrum Run?
Spectrum's free tier includes five testnet faucets. Besides Arbitrum Sepolia, you can claim test tokens on Ethereum Sepolia, Base Sepolia, Optimism Sepolia and Monad.
FAQ
What is the Arbitrum Sepolia chain ID? The Arbitrum Sepolia chain ID is 421614, or 0x66eee in hex. You can look up transactions on sepolia.arbiscan.io.
How much ETH does the Arbitrum Sepolia faucet give? The Spectrum Nodes faucet gives 0.1 ETH every 24 hours, sent to your Arbitrum Sepolia wallet. You can claim again once 24 hours have passed.
Is the Arbitrum Sepolia faucet free? Yes, the faucet is free. The only requirement is a social verification step: follow @SpectrumNodes on X and publish the prefilled post.
How long does it take to receive Arbitrum Sepolia ETH? The faucet sends your tokens within seconds of clicking Claim. Your X post has to be live first.
What can I use Arbitrum Sepolia ETH for? Use it to pay gas while you deploy contracts and test dApps or infrastructure on Arbitrum Sepolia. Testnet ETH is for testing only and is separate from mainnet ETH.