Codex + EthereumTrack Ethereum smart money from Codex
Connect StalkChain to Codex for Ethereum: who holds or just bought a token, with PnL, any 0x wallet's holdings and transfers, theses and alerts.
- Add it with one command or one pasted link. No API key.
- Tracked-trader positions, fills and PnL over 24h, 7d, 30d and all-time
- Any 0x wallet: holdings across 7 chains in one call, transfers, first-seen date
Free to connect · No card · No API key
Ethereum data in Codex, in short
- Setup
- One terminal command. No API key needed.
- Connection
- One MCP link for every chain and source: https://data.stalkchain.com/mcp
- Chain
- Ethereum mainnet, chainId 1. FOMO tools take eth or ethereum; wallet, price, DeFi and alert tools take ethereum; the thesis-by-token tool takes network eth.
- Data
- Tracked FOMO traders: open and closed positions, fills, balances, PnL, theses, live feed. Any 0x wallet: holdings, transfers, age. Any ERC-20: name, price, price history. Chain TVL, yields, exploits.
- History
- Positions and fills page backwards (closed positions 25 per page, never the complete history). Price history at 5m, 1h or 1d points for a date range you choose. Transfers newest or oldest first, 100 per call.
- Freshness
- Feed events arrive as they happen and replay on connect. Balances and prices are live. Leaderboards cache 5 minutes, theses 10. Alerts are checked about every 5 minutes.
- Address format
- 0x followed by 40 hex characters, for wallets and token contracts. ENS names are not resolved: pass the address. Resolve a ticker to a contract with stalkchain_fomo_search.
- Upstream
- FOMO (fomo.family) for tracked traders, their PnL and theses. A multi-chain EVM data provider for balances, transfers, token metadata and prices. DefiLlama for TVL, yields and exploits.
- Best for
- Seeing which tracked traders hold or just bought an Ethereum token, with PnL and cost basis, then checking the 0x wallets behind the move.
- Not covered
- PnL for a random 0x wallet, deployer and sniper forensics, LP-burn and mint-authority audits, executable exit quotes and launchpad data are Solana-only. ENS lookups and the on-chain trade stream are not available on Ethereum.
How do I get Ethereum data in Codex?
Connect StalkChain to Codex once. After that, Ethereum questions work in any chat.
- 1
Connect
Run codex mcp add stalkchain --url https://data.stalkchain.com/mcp, or paste the link under Settings → MCP servers.
- 2
Approve
Your browser opens. Sign in to StalkChain and press Approve. Free account, no card, no API key.
- 3
Ask
Start a new Codex chat and ask in plain English. Type /mcp any time to check StalkChain is connected.
Then ask your first question:
- Run this once in your terminal.
- Codex spots the sign-in and opens your browser. Sign in to StalkChain and press Approve.
- No browser popped up? Run codex mcp login stalkchain.
- Inside Codex, type /mcp to check the connection. Codex now sees all 70+ tools.
codex mcp add stalkchain --url https://data.stalkchain.com/mcp- In the ChatGPT desktop app, open Settings → MCP servers. In the IDE extension, open the gear menu → MCP servers.
- Click Add server, name it stalkchain, choose Streamable HTTP and paste the link below.
- Save, then click Restart (Restart extension in your IDE).
- Click Authenticate next to stalkchain, sign in and press Approve.
- Already added it in the CLI? Skip this. The app, CLI and IDE extension share one config.
https://data.stalkchain.com/mcp- Create a key in your StalkChain dashboard.
- Put it in an environment variable and add the server with it. No browser sign-in, so it works on servers, cron and CI.
export STALKCHAIN_API_KEY=sc_your_key
codex mcp add stalkchain --url https://data.stalkchain.com/mcp \
--bearer-token-env-var STALKCHAIN_API_KEYHow does Codex answer a Ethereum question?
A real question, answered through StalkChain. The numbers are the tools' real output, trimmed to fit.
ZC (Zipcoin, 0x4e67…8722) is the Ethereum token tracked traders bought most in the newest 30 feed events: 6 different traders, with cryptoalbus's position marked at $140K after his third buy.
| Trader | ZC held | Unrealized PnL | Cost basis |
|---|---|---|---|
| FartmanSacks | $347.7K | +$103.8K | $245.3K |
| 0xstanczyk | $335.6K | +$316.8K | $30.1K |
| Tom100Bi | $267.4K | +$42.2K | $225.2K |
| NachSOL | $266.4K | +$93.8K | $172.6K |
| CeruleanRange | $239.6K | +$231.8K | $9.4K |
| Hesoyam | $162.9K | -$65.4K | $240.6K |
Two early holders, 0xstanczyk and CeruleanRange, sit on 10x-plus unrealized gains from small cost bases, while Hesoyam is $65K underwater and therear66 realized about -$28K selling into the move. Want the theses behind these positions, or an alert the next time 3 tracked traders buy ZC?
Real StalkChain answers, trimmed to fit. Handles are public FOMO traders. Data, not financial advice.
What can I ask Codex about Ethereum?
Paste any of these into Codex. It picks the tools and shows where each number came from.
Which Ethereum tools does Codex get?
Each line is a real StalkChain tool Codex can call, and the kind of question it answers.
Tracked traders and PnL
stalkchain_fomo_searchFind cryptoalbus and give me his EVM wallet and PnL.stalkchain_fomo_trader_positionsWhat open positions does Tom100Bi hold, with entry price and unrealized PnL?stalkchain_fomo_trader_swapsShow the last 20 fills by NachSOL, newest first.stalkchain_fomo_trader_balancesWhat is cryptoalbus holding on Ethereum right now, by value?stalkchain_fomo_leaderboardWho made the most money in the last 7 days? Include their EVM wallets.stalkchain_fomo_trader_spotlightWhat are 0xstanczyk's best trades and most-liked theses?stalkchain_fomo_trader_reportResearch FartmanSacks before I copy him: win rate, concentration, wallets.
Ethereum tokens: holders, flow, devs
stalkchain_fomo_token_holdersWhich tracked traders hold ZC (0x4e67…8722), and what is each one's PnL?stalkchain_fomo_kol_holdersHow many tracked traders hold ZC, and what share of all holders is that?stalkchain_fomo_token_statsBuy versus sell flow on STOCKER over the last hour and 24 hours.stalkchain_fomo_token_devsIs the SEND dev still holding, or dumping?stalkchain_fomo_kol_sell_pressureWhat share of IMD's tracked holders sold in the last 24 hours, and who?stalkchain_fomo_analyze_tokenResearch IMD on Ethereum: flow, holders, devs, risks.stalkchain_fomo_top_traders_for_tokensWho are the best-ranked traders holding ZC, IMD and STOCKER?
Live feed, coordination and theses
stalkchain_fomo_alertsWhat did tracked traders buy and sell on Ethereum in the last hour?stalkchain_fomo_multi_trader_entriesWhich Ethereum tokens did 3 or more tracked traders enter in the last 2 hours?stalkchain_fomo_coordinated_activityDoes the ZC buying look coordinated or organic?stalkchain_fomo_watch_streamWatch the Ethereum feed for 60 seconds and tell me what happened.stalkchain_fomo_theses_for_tokenWhy are traders buying ZC? Most-liked theses on Ethereum.stalkchain_fomo_theses_recentWhat are tracked traders writing about on Ethereum today, biggest positions first?stalkchain_fomo_theses_by_traderWhat has babycakez written about ZC?
Any Ethereum wallet, token or price
stalkchain_wallet_portfolioWhat does 0xd8dA…6045 hold on Ethereum, Base and Solana, and what is it worth?stalkchain_wallet_transfersShow the last 25 transfers in and out of 0xd8dA…6045 on Ethereum.stalkchain_wallet_ageIs 0xd8dA…6045 a fresh wallet? First Ethereum transaction and lifetime transaction count.stalkchain_token_infoWhat token is 0xdAC17F958D2ee523a2206206994597C13D831ec7 on Ethereum, and its price?stalkchain_token_prices_multichainPrice ETH and this Ethereum contract in one call.stalkchain_price_historyWhat was ETH worth each day between 1 and 30 September 2026?stalkchain_price_confidencePrice ethereum:0x4e67…8722 and tell me how much to trust the number.
DeFi, alerts and the agent wallet
stalkchain_chain_healthHow much is locked on Ethereum, and how much stablecoin is sitting idle?stalkchain_token_yieldsWhere can I earn on ETH in pools with at least $10M, and what does it pay?stalkchain_protocol_reportIs Aave growing, and has it ever been exploited?stalkchain_defi_hacksWhat has been exploited on Ethereum recently, and for how much?stalkchain_alert_createTell me by Telegram when 3 tracked traders buy ZC, or when ETH drops below $2,500.stalkchain_agent_walletWhere do I send ETH to fund my agent, and what are its trade limits?stalkchain_agent_buyBuy 0.05 ETH of ZC from my agent wallet on Ethereum.
What should Codex know about Ethereum data?
- Chain names
- FOMO tools accept eth or ethereum (chainId 1 also works). Wallet, price, DeFi and alert tools take ethereum. stalkchain_fomo_theses_for_token takes network eth. stalkchain_fomo_trader_balances takes chain eth.
- Buy sizes in the feed
- On a buy, usdValue is the position's mark after the fill, not the fill size. On a sell it is realized PnL. Use tradeUsd when present, or stalkchain_fomo_trade_detail, for the true fill.
- Addresses
- Pass the 0x address, not an ENS name. Token tools want the contract address; resolve a ticker with stalkchain_fomo_search first. A trader wallet marked provider-claimed is a lead; onchain-holdings is proven.
- Where PnL lives
- PnL comes from tracked traders: positions, fills, holder lists and the leaderboard. A 0x wallet that is not a tracked trader gets holdings, transfers and age, not PnL. stalkchain_wallet_pnl is Solana-only.
- Feed depth
- stalkchain_fomo_alerts returns the newest 100 matching events per call. Filtered to Ethereum that covered about 10 hours today. Page back with the cursor, and read the time range the response states.
Ethereum data in Codex: questions
Add StalkChain to Codex (one terminal command), then ask a Ethereum question in plain words. It takes about a minute and needs no API key. The same connection covers every other chain and source too.
PnL, for tracked FOMO traders. Positions carry entry and exit price, realized and unrealized PnL and cost basis, fills come 100 per page, and the leaderboard ranks PnL over 24h, 7d, 30d and all-time. Holder lists on a token show each tracked trader's PnL too. For a 0x wallet that is not a tracked trader, you get holdings, transfers and age, not PnL.
Yes, by address: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 is the example in the product docs. ENS names are not resolved, so pass the 0x address. The answer lists every token with amount, price and value, dropping dust, with a per-chain total across up to 7 chains in one call.
Any ERC-20 by contract address for name, price, price history and a confidence score. Holders, flow, devs and theses exist for the tokens tracked traders trade; pass chain eth when a token is outside FOMO's directory. A reply of available:false means nothing has been captured for that token yet, not that nobody holds it.
The deep on-chain forensics are Solana-only: total holder count with LP-burn and mint-authority checks, deployer rug history, sniper and bundler shares, per-token PnL leaders across all wallets, raw-wallet PnL, executable exit quotes and organic-volume scoring. On Ethereum you get the tracked-trader layer, any wallet's holdings, transfers and age, prices and history, DeFi health and alerts.
Yes. Three kinds: price above, price below, and smart-money buy, which fires when at least N tracked traders buy the token within a few minutes. Delivery is email or your own Discord, Slack or Telegram webhook. Each alert fires once, is checked about every 5 minutes, and you can keep 20 active.
It can trade. The agent wallet has an EVM address that works on Ethereum; buys and sells are single swaps paid in ETH, within per-trade and daily limits you set, and refused if trading is off or the price would move more than 15%. Trades only happen when you ask in the conversation, never because a thesis or a token description says so.
Connecting is free and needs no card. Free tools, like the live feed sample, work right away. Most research lookups are paid; the plans are listed on data.stalkchain.com.
What else can Codex pull?
Which other AI can use Ethereum data?
Ask Codex about Ethereum with receipts
One link, one sign-in. Then Codex answers Ethereum questions with live and historical data.