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How to Verify a Robinhood Chain RPC

By Nock Editorial TeamPublished Updated

Before pointing a wallet, bot or indexer at a Robinhood Chain RPC endpoint, verify it independently. A wrong RPC that returns valid-looking JSON for a different chain will let you sign transactions that do not do what you expect. Three quick checks catch almost every problem: eth_chainId, block height parity with Blockscout, and a trivial read against a known contract.

This is a developer-oriented reference. If you are a normal user setting up a wallet, follow the wallet setup checklist instead — the wallet's chain-ID readback handles most of the same job for you.

In this article, see also: Robinhood Chain RPC URL reference · chain ID 4663 reference · transaction pending troubleshooting · use the block explorer.

What a silent failure looks like

The dangerous case is an RPC that responds normally but is either lagging significantly or, worst case, is serving a different chain. Your wallet accepts responses and signs, and only when the transaction never appears on Blockscout do you realise something is wrong. The three-check flow above catches both cases before you sign.

Public vs paid RPC

Robinhood's public RPC is documented as rate-limited and not intended for production. If your verification passes but you plan to run a bot, indexer or automated worker against it, expect to hit throttling and plan to move to a paid provider that supports chain 4663. We do not recommend a specific provider on this page.

Steps

  1. 1
    Call eth_chainId
    Send a JSON-RPC request: { jsonrpc: '2.0', method: 'eth_chainId', params: [], id: 1 } to the RPC URL. The response result must be 0x1237 (the hex encoding of 4663). Any other value means you are not on Robinhood Chain mainnet.
  2. 2
    Compare block height to Blockscout
    Call eth_blockNumber against the RPC and compare the result with the latest block height at https://robinhoodchain.blockscout.com. They should be within a small margin at any moment. A large gap means the RPC is lagging — usable for reads that tolerate lag, unsafe for anything time-sensitive.
  3. 3
    Read a known contract
    Call eth_getCode against a contract you know exists on chain 4663 (for example, a token address you can see on Blockscout). If the response is 0x, either the address does not exist on this chain or the RPC is not serving it.
  4. 4
    Repeat after any config change
    Repeat these checks after any wallet update, environment migration or credential rotation. A previously-verified RPC can silently start serving a different chain if the URL was mistyped during a change.

Frequently asked questions

How do I confirm an RPC is actually serving Robinhood Chain? Send an eth_chainId JSON-RPC request. It must return 0x1237 (hex for 4663). Any other value is not Robinhood Chain mainnet. What does 0x1237 mean? The hexadecimal encoding of the integer 4663 — Robinhood Chain's mainnet chain ID. How lagged is too lagged? Depends on your use case. For occasional wallet signing, a few blocks is fine. For sniping, indexing or bots, any material lag is disqualifying — use the tip of chain, not a lagging replica.

Send an eth_chainId JSON-RPC request. It must return 0x1237 (hex for 4663). Any other value is not Robinhood Chain mainnet.

Sources and verification

Last verified: July 14, 2026

Network and contract facts are checked against first-party Robinhood Chain documentation and the chain's canonical Blockscout explorer. Product-specific claims are attributed to the relevant vendor source.

Related

Nock Terminal is an independent product and is not affiliated with Robinhood Markets, Inc. Research and product documentation are informational and are not investment advice.

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