Robinhood Chain network details

Robinhood Chain mainnet uses chain ID 4663, which is 0x1237 in hexadecimal. Wallets use the chain ID — not the network name — to decide which chain a transaction is valid on, so it has to match exactly. A wrong chain ID is the single most common reason a manually-added network refuses to connect.

The number is not random. On a phone keypad, 4-6-6-3 spells H-O-O-D: Robinhood’s ticker.

The public endpoint above is free and needs no API key, which makes it perfect for adding the network to a wallet or poking at the chain from a script. It is also rate-limited, and Robinhood’s own docs tell production applications to use a commercial provider instead.

If you are building something that polls, indexes, or serves users, get a dedicated endpoint from a provider such as Alchemy or QuickNode, both of which support Robinhood Chain. One gotcha worth knowing before you pick: free tiers cap how wide an eth_getLogs range you may request, which matters a great deal if you are scanning history.

See Robinhood’s connection docs for the full list of endpoints, including the sequencer and its WebSocket feed.

Robinhood Chain is an Arbitrum Nitro layer-2 — an optimistic rollup that executes transactions on its own network and posts its data back to Ethereum L1 for availability and settlement. In practice, that means it inherits Ethereum’s security for data while running far faster and cheaper than Ethereum itself.

Blocks land about every 100 milliseconds — roughly ten blocks a second, and notably faster than the 250 ms default that Arbitrum Nitro chains normally ship with. The sequencer returns a receipt in sub-second time, so a swap or a launch feels instant. Full Ethereum finality for the batch takes about 13 minutes, and withdrawing back to Ethereum L1 goes through the standard 7 days challenge period.

Two things worth knowing before you treat it like Ethereum. Ordering is first-come-first-served by sequencer arrival time, not a priority-fee auction — so bidding a higher tip does not buy you a better position. And the chain is young: the sequencer is operated by Robinhood, its contracts are upgradeable, and only a small set of whitelisted actors can currently challenge state. You can read the independent assessment on L2Beat.

There is no separate gas token. Robinhood Chain pays gas in ETH, with 18 decimals, exactly like Ethereum mainnet. There is also no native chain token — the network launched without one.

A fee has two parts: the L2 execution fee for running your transaction, and an L1 data fee covering the cost of posting its data to Ethereum. Your wallet bundles both into a single estimate automatically, so you rarely have to think about it — but it does mean a transaction with a lot of calldata costs more than its gas usage alone suggests.

There is a public testnet with its own chain ID, 46630 (0xb626). Use it to rehearse a deployment before spending real ETH.

• RPC URL: https://rpc.testnet.chain.robinhood.com
• Explorer: explorer.testnet.chain.robinhood.com
• Faucet: faucet.testnet.chain.robinhood.com

Note that Greenlit runs on mainnet only. Testnet coins have no liquidity and no value.

Almost every failure to add or use the network comes down to one of four things:

• Chain ID mismatch. It must be exactly 4663. Some wallets want the hex form, 0x1237. If your wallet says the chain ID does not match the one returned by the RPC, you have typed the wrong number.
• A trailing slash or space in the RPC URL. Paste it with the copy button above rather than retyping it.
• Rate limiting. The public endpoint will refuse requests under load. It is not down; you are being throttled. Retry, or move to a dedicated provider.
• The network is already added. Wallets reject a duplicate network rather than adding it twice. Check your network list before assuming it failed.

If you just want it in your wallet without any of this, use the one-click add page.