Privacy Policy

LAST UPDATED · 2026-05-15

PolyParlay ("we", "the extension") is a Chrome browser extension that helps users build multi-leg parlays from Polymarket markets. This privacy policy explains what data the extension accesses, how it is used, and what is never collected.

What the extension accesses

Polymarket page URLs. When you click "+ Add to slip" on a Polymarket market page, the extension reads the URL slug to identify the market. It does not read any other browsing activity.
Public Polymarket Gamma API. The extension queries gamma-api.polymarket.com to fetch market metadata (question text, current YES/NO prices, resolution date). This is public on-chain data; no authentication is involved.
Local browser storage. The parlay slip you build (selected markets and stake amount) is saved in chrome.storage.local on your device only. It is not transmitted to any server.

What we never collect

Your Polymarket login, password, or session credentials
Your wallet private keys or seed phrases (PolyParlay never asks for these)
Your browsing history outside Polymarket
Personally identifying information (name, address, phone)
Any data on third-party servers (the free tier has no backend)

Shareable slip links

When you generate a shareable slip link, the slip data (markets, prices, stake) is encoded in the URL hash fragment (e.g., polyparlay.app/slip#<encoded>). The hash is readable to anyone who has the link. The hash is never sent to our servers — by design, URL fragments stay client-side.

Pro tier — payment verification

Pro unlocks via a one-time payment of 149 USDC on Polygon to a wallet address we publish on the upgrade page. When you submit the wallet address you paid from, our Cloudflare Worker queries Polygonscan to confirm the on-chain transfer occurred. The worker receives your public wallet address only — never private keys. The wallet address is not retained after verification.

Future Pro tier data handling

As Pro adds more analytics features (saved parlay history, win-rate tracking, etc.), data accumulated under your Pro subscription stays scoped to your installation. We will not sell, share, or transfer it. If your subscription lapses, the historical data locks but is preserved — paying again unlocks it.

Permissions explained

storage — saves your slip on your device
activeTab — detects when you're on a Polymarket market page
tabs — opens market pages when you click a leg's "Open" button
host_permissions for Polymarket and Gamma API — injects the "+ Add to slip" button on Polymarket pages and fetches market data
host_permissions for *.workers.dev and polyparlay.app — Pro payment verification only; called when you submit a wallet address on the upgrade page

Contact

Questions or deletion requests: hello@polyparlay.app