Chrome Extension · Free · Open Source

See the odds.
Trade the news.

OddsLens scans your Twitter feed and news sites in real-time. Finds matching Polymarket events. Shows live odds, orderbook depth, and one-click trading — right on the page.

Install OddsLensWatch demo
OddsLensLIVE
Will Trump deport less than 250,000?
Yes 34.0%No 66.0%
Buy Yes · 34¢Buy No · 66¢
Mid33.5¢
Spread1.8¢
Vol$2.1M
Liq$840K
Bitcoin above $150K by July?62%$18.2M
Fed rate cut in September?73%$4.1M
Trump deport < 250K?34%$2.1M
AI passes bar exam 2026?88%$1.4M
SpaceX Starship orbital?81%$4.2M
Ukraine ceasefire by Dec?22%$6.8M
Apple stock above $250?55%$3.3M
Next pandemic by 2027?12%$890K
Bitcoin above $150K by July?62%$18.2M
Fed rate cut in September?73%$4.1M
Trump deport < 250K?34%$2.1M
AI passes bar exam 2026?88%$1.4M
SpaceX Starship orbital?81%$4.2M
Ukraine ceasefire by Dec?22%$6.8M
Apple stock above $250?55%$3.3M
Next pandemic by 2027?12%$890K

Built for speed.
Designed for traders.

Every feature exists to get you from headline to trade faster.

Smart NLP Scanning

Extracts entities, proper nouns, and event signals from tweets. Filters memes and noise automatically.

Live CLOB Orderbook

Real-time bids, asks, spread, and midpoint from Polymarket's Central Limit Order Book API.

One-Click Trading

Buy Yes or No straight from the overlay. EIP-712 signed orders post directly to Polymarket's CLOB — no tabs, no redirects.

Relevance Scoring

Bidirectional word matching ensures only truly relevant markets appear. No false positives.

Native Dark Mode

Adapts to Twitter's dark theme automatically. Glassmorphism design that feels native everywhere.

Open Source

No tracking, no data collection, no accounts. Every line of code is public on GitHub.

Three steps. Zero config.

01

Install in one click

Add OddsLens to Chrome. No account, no API keys, no configuration. Works instantly.

02

Browse your feed

Open Twitter, Reddit, or any news site. OddsLens scans every headline with NLP-powered entity extraction.

03

See odds. Trade.

Matching Polymarket events appear inline with live prices, orderbook depth, and one-click trading links.

The overlay × the popup

One toggle rules everything.

Flip Trading mode in the popup — overlay on every tweet adapts instantly. Signal-only when off (read odds, open Polymarket). Quick-buy when on (click, signed, done).

OddsLensTRADING
Trading mode
Enable quick-buy from overlay
Overlay shows quick-buy buttons. Wallet active, P&L tracked.
Live sync
Bloomberg@business · 2h

Bitcoin rally continues as spot ETF inflows hit record $840M this week. Analysts raise year-end targets.

💬 8.2K🔁 32K❤ 156K📊 2.4M
1
Ambient strip
40px line always visible under the tweet. Shows market, live price, momentum.
2
Click expands
Amount presets pre-selected ($25). Live shares preview on every button.
3
Click buys
No modal. 400ms signing flash. Success state with 30-second undo.
4
Auto-collapses
After 30s — overlay shrinks back to strip. You keep reading.
0Live markets indexed
0Avg scan time
0Local & encrypted
0Cost forever

Documentation

Everything you need to install, configure, and contribute to OddsLens.

Installation

Load OddsLens as an unpacked extension from GitHub:

1Clone or download the repo from GitHub
2Open chrome://extensions and enable Developer Mode
3Click "Load unpacked" and select the oddslens-extension folder
4Navigate to X.com — overlays appear automatically on tweets about current events

Configuration

Tune OddsLens from the popup settings panel:

Sensitivity1 (strict) → 5 (loose)
Scan modeall / verified / custom
Max overlays1–50 per page
Scan interval1000–10000 ms
AI matchingoptional OpenAI key

Supported Sites

OddsLens overlays Polymarket odds on tweets at:

X.comTwitter.com

AI Matching (Optional)

OddsLens works great with keyword matching alone. For even better accuracy, add your OpenAI API key in Settings → AI tab to enable semantic analysis. The AI determines if content is market-relevant and generates optimized search queries.

1Open popup → Settings → AI tab
2Paste your OpenAI API key
3Click "Test" to verify — done!

Contributing

OddsLens is 100% open source. We welcome contributions of all kinds — bug reports, feature requests, new site parsers, or documentation improvements. The codebase is vanilla JavaScript bundled via esbuild, with a comprehensive Vitest suite covering matching, filters, and pool refresh.

View on GitHub

Ready to see the odds?

Free forever. Open source. No account required.

View on GitHub

Clone, load as unpacked extension. Works on Chrome, Brave, Edge, Arc.