[ SUPANODE ]by hightower
// robinhood · rpc

Robinhood Chain RPC & WebSocket

Standard Ethereum JSON-RPC over HTTPS and eth_subscribe over WebSocket on our own Robinhood Chain node - an Arbitrum Layer 2 with chain ID 4663 - with debug tracing and logs since genesis, without the ceiling of the shared public endpoint.

[ view pricing ]open portal →talk to support
Robinhood · rpc● live
chain ID
4663
node overhead
1-7 ms
01.WHAT'S INCLUDED// Robinhood · rpc
  • Standard Ethereum JSON-RPC methods
  • eth_subscribe: newHeads · logs
  • debug_trace* with callTracer and prestateTracer
  • Blocks, receipts and logs since genesis
  • Batches up to 1,000 calls
// factsSPEC
Interface
Ethereum JSON-RPC over HTTPS and WebSocket (WSS)
Subscriptions
newHeads · logs
Chain ID
4663
Stack
Arbitrum Orbit rollup
Gas token
ETH
History
blocks and logs since genesis · state ~5 days
Region
US East (New York)
Auth
x-token header, one token for HTTPS and WSS
Rate limits
set per subscription
Free trial
up to 24h, no card
02.HOW IT WORKS// request path
// HOW IT WORKS
Standard Ethereum JSON-RPC over HTTPS, so ethers, viem, web3.py, Foundry and Hardhat work on Robinhood after swapping the URL. Authenticated by your token at the gateway.
// BLOCK TAGS
Query against latest, safe, finalizedor an explicit block number — archive access covers state older than the node's recent window.
// NAMESPACES
The eth, net and web3 namespaces are on by default; debug and trace are enabled on request, since tracing is expensive to serve.
// DELIVERY PATH
your app
↓
x-token header
↓
robinhood.supanode.xyz
↓
Robinhood node
◆Rate limits are quoted per subscription rather than tiered. The endpoint host above is illustrative — the region is chosen when your node is provisioned.

Pricing - Robinhood Chain RPC & WebSocket

  • Robinhood Chain RPC & WebSocket

    $389 USD / month - one subscription within tier limits

Crypto-only, prepaid. No per-request fees.

Full pricing and plan limits
04.FAQ// 5 questions
Is WebSocket billed separately?

No. It is the same node and the same token, approached from the other side - RPC is you asking, WebSocket is the node telling you - so it is one subscription, not two line items. A backend polling eth_getLogs every second is doing by hand what one logs subscription does by itself, at a fraction of the request budget.

Why pay for RPC when Robinhood publishes a free endpoint?

The public endpoint is rate limited and meant for wallet connectivity and testing. It is the right tool until a backend starts polling it, at which point the ceiling becomes the bottleneck. Our endpoint removes the shared ceiling and adds debug tracing.

Do my existing Ethereum tools work?

Yes. Robinhood Chain is an Arbitrum Orbit rollup and fully EVM compatible, so ethers, viem and web3.py work after swapping the endpoint URL and adding the x-token header. Gas is paid in ETH. Call the node from your backend: browsers cannot set the header on a WebSocket handshake.

Can I query historical state?

Blocks, transactions, receipts and logs go back to the first block. State at a past block - eth_call or eth_getBalance with a block number - reaches back about 5 days, because this is a full node. For older state order an archive dedicated node; for decoded Uniswap and launchpad history the Robinhood Indexer answers in SQL.

How is Robinhood Chain RPC priced and provisioned?

One flat monthly tier - the number is on the Robinhood Chain pricing page - with a free trial of up to 24 hours, no card. Start in the Supanode portal and you get your token for HTTPS and WebSocket. Billing is the same as everything else here: crypto-only, monthly and prepaid.

Get Robinhood Chain RPC & WebSocket.

Start in the portal. Our engineers set up the rest - endpoint, token, tuning.

[ get started ]◀ Robinhood services