Browser extension · Privacy
It collects nothing
The Feyn extension collects no browsing data. The only thing it sends is the token address of the page you are on, to Feyn, to fetch that token's verdict.
What it reads
The extension runs only on these trading sites:
axiom.tradetrade.padre.gggmgn.aipump.funswap.pump.funphoton-sol.tinyastro.iofomo.familybirdeye.sojup.agdexscreener.com
On them, it reads the address of the page you are on to find the Solana token the page is about. On DEX Screener, whose addresses are lowercase in the page address, it also reads the token links on the page to get the exact address. It reads nothing else: no page text, no wallets, keys or balances, no forms, no other tabs, and nothing at all on any other site.
What it sends
When the page is about a token, the extension sends that token address (or the trading-pair address the site shows for it) to api.feyn.fun and receives the token's public verdict. This is the same request feyn.fun makes when you search for a token. It never sends the page address, your browsing history, or anything that identifies you.
While you stay on that page, the extension keeps this one request open so the verdict updates live (a new finding, a token turning into a scam). A token created seconds ago is asked about again a few times in its first seconds. The data sent is still just the token address, and the connection closes when you leave the page or the tab stays in the background.
Like any request on the internet, it reaches our server from your IP address. Feyn keeps no per-request logs of IP addresses: the server uses the address in memory to apply the free lookup limits, and counts daily visitors only as salted hashes whose salt is discarded every day.
What it keeps
Your options (the panel's corner, where you dragged it on each site, the sites it runs on, whether you minimised it on a site) stay in your browser's extension storage. Recent verdicts are cached in memory to show them instantly, and are cleared when the browser closes. Nothing is synced or sent anywhere.
What it never does
- No account, no sign-in, no wallet connection.
- No analytics, no tracking, no cookies, no ads, no third-party services.
- No remote code: everything the extension runs ships inside it.
- No sale or sharing of data. There is no data to sell.
Contact
Questions: @reaperofrugs on Telegram. If this policy changes, the new version is published on this page before the extension changes. Last updated 2 October 2026.