Tools

PolyViper

By alexander.betok

Be the VIP on Polymarket — every fill, every fee, traced.

View Chrome Web Store

Time on the storeUnder 6 monthsA rough range, not an exact date

Store users7As shown on the Chrome Web Store

Chrome Web Store rating5.0 / 52 ratings on the Chrome Web Store

Last store update2 Aug 2026Version 0.2.0, 2 months ago

Inside the extension

Product image 1 of 4

Reviews

david 0x2 months ago
I really like the event grouping and fee features in this. It helps me clearly distinguish between market fees and limit fees, as well as which actions require fee payment and which do not.
zhengpeng cong2 months ago
The official P/L always confused me — average cost, gross of fees, and redeems/splits are a black box. PolyViper pairs every sell with the exact buys it closed (FIFO), shows hold time and taker fees per fill, and traces redemptions properly. Turns out I paid $90 in taker fees last month — the official UI never tells you that. If you trade on Polymarket, just install it.

Reviews

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Permissions & access

Access levelMedium

Can change web traffic on the sites it can access.

What it’s allowed to do, not what it actually does. Not a safety rating.

Permissions 4

Sensitive1

Change web traffic on the sites it can accessdeclarativeNetRequestWithHostAccess

Standard3

Save its own settingsstorage
Store large amounts of its own dataunlimitedStorage
Run tasks on a schedulealarms

Members also see when a new version asks for new access.

Website access 4

polymarket.com
data-api.polymarket.com
gamma-api.polymarket.com
clob.polymarket.com

Extension ID: hkfjjdbpabhmgobjmblkijjlppnmnkad
Package size: 297KiB
Manifest: Version 3

The maker

This is the only listing we know of from alexander.betok.

Listings: 1
Combined store users: ≈7
Store Featured: 0

Combined users can count the same person more than once. Maker profile Developer website

Ext Watch AI

Should you build in this niche?

See plans

One research report for PolyViper. Reports come with Plus, Pro and Max.

Takeaway & demandCited takeaway and search volumes
Traffic & domainPopularity rank, visits and authority
Money & pricingPlans and prices from the maker’s site
ReviewsComplaints and praise, quoted
Competitors & ranksRank against the closest listings
Build opportunityWhat to build and how to position it

Every number shows its source and date
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Report and PDF yours for 30 days

Inside the extension

Reviews

Reviews

Competitors

Permissions & access

Permissions 4

Sensitive1

Standard3

Website access 4

The maker

Should you build in this niche?

Reviews