A Chrome extension that corrects what X tells you about tokenized stocks, and lets you act on the correction without leaving the page. Built for BNB Hack: Tokenized Stocks Edition on BNB Chain with bStocks. Spot trades only.
- Download
OptimAI-Agentic-Chrome-Extension-1.0.0.zipfrom the link above and unzip it. - Open
chrome://extensions, turn on Developer mode, click Load unpacked and select the unzipped folder. - Open x.com and click OptimAI Agentic in the left sidebar. The panel opens.
- In the panel header set the chain to BNB Chain and the issuer to bStocks. The choice is remembered.
- Search
$NVDAon X. To buy, install MetaMask in the same Chrome profile and select BNB Smart Chain.
To build it yourself, see Build and test.
A cashtag that names a listed ticker gets a button in the action bar. It opens the panel on that ticker, with the price on the selected chain (the multiplier already divided out), what the underlying share costs, and whether the token can actually be bought.
Search $NVDA on X and you get NVIDIA Corp, NASDAQ, $222.27. Nothing on the page
says a tokenized NVDA trades on BNB Smart Chain, or that it kept trading after
that price froze.
A card goes in above X's own, carrying a chart with the hours the exchange was shut shaded in, and what the token did across them. Measured on one such closure: from Friday's closing bell, NVDAB traded for 14 hours through a 2.17% range on 1.68 million of volume. X's card draws that as a flat line.
A lighter content script finds tokenized stocks mentioned on ordinary pages, puts a card behind each one and opens the same trade panel. It stays off X, mail, document editors, sign-in pages and the trading venues themselves.
The panel has a chat with an agent. To research a ticker it can ask the extension to open X's own search for a query (Latest or Top) in the current tab and scroll it like a reader would, up to 28 scroll steps or 40 seconds per search. The extension never calls X's API itself: it reads the responses the page loads anyway (see How it works) and hands the parsed posts to the agent, which classifies them and writes the answer. Follow-up questions are answered from the same posts and the live numbers.
At the end: a live quote, an unsigned transaction, and your own wallet (MetaMask). Nothing here is a recommendation to buy or sell; the panel reports evidence and numbers and the decision stays yours.
Search $TSLAx and X shows contract XsDoVf…HzoB, a Solana mint. The BSC
token is 0x8ad3c73f…, a different address entirely. Parse the contract off X's
card and you have the wrong chain.
This is structural, not a bug X will fix. Its cashtag stack is Solana-native:
feature flag rweb_cashtags_enabled, chart data from Birdeye, RPC from Helius,
actions from Dialect, and contract_address filled from a generic asset.crypto
field.
A browser extension can correct the page. The page cannot correct itself.
The extension reads X's own network traffic rather than asking X for anything: a
MAIN-world content script at document_start hooks XMLHttpRequest before X's
bundle can take its own reference, and parses the responses the page was already
loading. When the agent searches, it drives X's own UI to make the page load
them. No request is made to X that the page would not have made.
One token is not one share. Ondo and bStocks tokens reinvest dividends, so
the multiplier drifts above 1. Measured live: AGGon has a multiplier of
1.038181, and comparing its raw token price to the share price shows a +3.818%
gap. Divide first and it is −0.000%. The gap is arithmetic. It affects 255
of the 667 tokenized stocks on BSC.
Only one issuer has a market on BSC. Probing PancakeSwap V2, V3 and the Infinity vault: NVDAB carries $1.42M of depth, TSLAB $482K, SPYB $351K, while AAPLx, TSLAx and NVDAx all measure $0 to $10. xStocks is deployed on BSC at scale and cannot be bought there. Ondo has a price and almost no pool, because it settles by RFQ off the AMM entirely.
bStocks publishes no share price. Verified null for AAPLB, MSFTB, GMEB and DJTB. The comparison price is borrowed from the Ondo token of the same ticker, and the panel names the source. Ten of the 77 bStocks have no counterpart anywhere, and those simply show no gap rather than one computed against zero.
| What | Where | Lifetime |
|---|---|---|
| Chat transcript (up to 30 messages, about 2 MB, one per tab) | chrome.storage.session |
until the browser closes |
| Chain and issuer choice | chrome.storage.local |
until the extension is removed |
| Trades waiting to be recorded in the portfolio | chrome.storage.local |
until recorded |
Nothing is kept in the page's own localStorage, which x.com's scripts can read.
There is no account and no sign-in. The extension holds no API keys, and the
wallet holds the only private key.
Chains and issuers in this build
The panel opens on Solana with Ondo tokens (DEFAULT_CHAIN and
DEFAULT_VENUE in packages/shared/lib/constants/env.ts). A switcher in the
panel changes the pair. The listings are:
| Chain | Issuers |
|---|---|
| Solana (default) | Ondo, PreStocks |
| BNB Chain | bStocks, Ondo |
Switching to BNB Chain with bStocks is the path the hackathon findings above were measured on. On the Solana side MetaMask signs too.
You need Node 22.15.1 or newer (.nvmrc) and pnpm 10.11 (packageManager in
package.json; corepack enable picks it up).
pnpm install # also copies .example.env to .env if there is no .env
pnpm build # then load dist/ at chrome://extensions (Developer mode)
pnpm dev # watch build, for developmentAfter every rebuild, press reload on the extension card at chrome://extensions
and reload the x.com tab.
pnpm -F @extension/content-ui test # 411 unit tests in 37 files, no browser
pnpm -F chrome-extension test # 2 unit tests for the background fetcher
pnpm type-check
pnpm lintThe end to end suite is different in kind. It drives a real, signed-in Chrome
on the real x.com, with no retries, and it
makes one live model call. It is 24 tests in 8 spec files. Read
tests/e2e/README.md before running it, because it touches a real X account.
pnpm build && pnpm -F @extension/e2e e2epages/content/src/matches/x-network/ MAIN world, document_start: hooks XHR
pages/content/src/matches/svm-wallet/ MAIN world: the Solana wallet bridge
pages/content-ui/src/matches/x/ the panel, the tweet button, the search card
pages/content-ui/src/matches/web/ the card on every other site
chrome-extension/src/wallet/ MetaMask, from the background
chrome-extension/src/api/ the background fetcher for API calls
packages/shared/ constants, message types, the agent card contract
MIT, see LICENSE. Extension scaffolding from chrome-extension-boilerplate-react-vite (MIT). See THIRD_PARTY_NOTICES.md, which also covers the Ajv code embedded in the generated validators.