Robinhood Chain Trader Data: Wallets, Trades, and PnL in One API

Robinhood shipped its own chain, and it is already where a lot of FOMO trading happens.

Robinhood Chain went live on mainnet on July 1, 2026. It is an EVM Layer 2 (chain id 4663) built on the Arbitrum stack, with ETH for gas. On fomo.family it is not a niche corner: right now it is the single most active chain in the FOMO feed, ahead of Solana, Base, BNB Chain, and Ethereum.

If you are building on top of FOMO trader activity, the Robinhood Chain slice is the biggest slice, and you want it clean: which trader, which wallet, which token, what size, and why. The FOMO API gives you all of that from one key, and every record is labeled robinhood so you never have to memorize 4663.

One handle, both wallets

Robinhood Chain is EVM, so a trader's Robinhood wallet is their EVM address. Resolve any handle and you get both chains at once:

curl "https://api.fomoapi.io/v2/users/mino" \
  -H "authorization: Bearer YOUR_API_KEY"

{
  "handle": "mino",
  "wallets": {
    "solana": "BApmmTd7dcnRsBTUZ9ciKmugTwAreFzKwFWGnEKeGtGr",
    "evm": "0x6ab164092c03cf84f5e2d4ea968678062c774772"
  }
}

The evm address is the trader's Robinhood Chain wallet (the same address works across every EVM chain). The same response carries PnL by window, live holdings, and account age.

Their Robinhood trades, labeled

curl "https://api.fomoapi.io/v2/users/mino/positions?limit=5" \
  -H "authorization: Bearer YOUR_API_KEY"

Each trade carries both the numeric chainId and a friendly chain name, so Robinhood Chain trades are obvious at a glance:

{
  "chain": "robinhood",
  "chainId": 4663,
  "side": "sell",
  "token": { "symbol": "BOW", "address": "0x..." },
  "sizeUsd": 5000
}

PnL is passed through as fomo.family reports it, and each handle is resolved to its wallets so you can check the trades on-chain.

The whole chain, in real time

Filter the activity stream to Robinhood Chain only. Over REST:

curl "https://api.fomoapi.io/v2/alerts?chain=robinhood&limit=50" \
  -H "authorization: Bearer YOUR_API_KEY"

Or live, over the WebSocket:

new WebSocket("wss://api.fomoapi.io/ws/alerts?chain=robinhood");

Every buy, sell, and thesis on chain 4663, as it happens, each item carrying the token contract, size, trader, and chain. You can narrow further to one trader (?trader=<handle>), one token (?token=<symbol|address>), or one event type (?type=buy). robinhood, hood, and rh all resolve to chain 4663.

Why one API instead of five

Doing this yourself means stitching together a chain explorer for the wallet, a price source for the size, an identity map from handle to address, and a social feed for the thesis. Here it is one key and one shape:

handle to wallet to trades to holdings to thesis to live stream, for Robinhood Chain and every other chain in the same response format.

The free tier covers 10,000 requests per month, with every endpoint and the WebSocket included. Higher request volume and 24/7 streaming are on the paid plans at /pricing.

Chains covered

Robinhood Chain (chainId 4663), Solana, Base, BNB Chain (BSC), and Ethereum. Every trade, holding, and alert carries both chainId and a friendly chain name.

FOMO API is an independent, unofficial data layer for fomo.family. It is not affiliated with, endorsed by, or sponsored by FOMO or Robinhood.