Know the card.
See the proof.
Then bid.

Slabscout turns the card on a live Whatnot stream into a match you can inspect: the exact card, the reference image, the confidence signals, and the most relevant price comps—all before the auction moves on.

Get Slabscout — free See how it works No account. Bring your own Google AI key.
A real scan, on a real stream
Live Whatnot card break
LIVE604
Item on Screen #32$12 · 9 bids
Michael Jordan
1990 SkyBox #41 ✓ verified
PSA 9 ✕
$59.72
Market value · PSA 9 · 7,358 sales/yr
Live bid $12below value −80%
Raw $4.88 PSA 10 $800
Raw $4.88PSA 9PSA 10 $800
Comps Match Cards3 Parallels2
Your scan from the streamYour scan
Matched catalog cardSCP catalog
✓ Player✓ Year ✓ Set✓ #41✓ Visual 8/8
eBay live · asks ≠ soldsVerify on eBay →
Bid with evidence

Stop bidding on a guess.

Live auctions move faster than manual research. Search too broadly and the comps are meaningless. Search too carefully and the card is already gone. Slabscout puts the match and its evidence directly on the stream, so you can verify first and decide fast.

See why it matched

Your scan sits beside the matched reference image. Player, year, set, card number, and visual agreement are shown as separate checks. If the evidence is incomplete, Slabscout says “Needs review” instead of dressing up a guess.

Price the exact card

Raw cards, slabs, and parallels are kept separate. Sold evidence is labeled as sold; live listings are labeled as asking prices. You can inspect the comp photos and open the underlying eBay results before trusting the number.

Know when to pass

The live bid is compared with the available market evidence while the auction is still running. A bargain signal is useful. A warning that the match is uncertain—or the bid has outrun the comps—is often worth more.

How it works

One key between the card and a better decision.

Install once

Add Slabscout to Chrome, Edge, or Brave. There is no Slabscout account to create.

Connect card recognition

Paste your Google AI key into Slabscout settings. The key stays in your browser and is used only when you ask Slabscout to scan.

Press S

When the card is visible on a Whatnot stream, press S. Review the match, compare the images, and make the call.

Install

Get ready before the next break.

The Chrome Web Store listing is still in review. For now, you can install Slabscout manually in about a minute:

Manual install (Chrome / Edge / Brave)
1. Download the extension ZIP and unzip it anywhere.
2. Go to chrome://extensions and turn on Developer mode (top right).
3. Click Load unpacked, pick the unzipped extension folder.
4. Open Settings from the extension, paste your key, go scan something.
FAQ

Before you trust it with a bid

What's the catch? Why free?
Slabscout is currently free and does not require an account. Card recognition uses your own Google AI key, so Slabscout does not need to resell AI usage to you. If the product or pricing changes later, it will be disclosed before you opt in.
Are the prices always right?
No. A comp can be stale, a parallel can be misidentified, and condition can change the price. Slabscout is designed to make those risks visible: it shows the match score, reference images, source labels, comp photos, and a direct eBay verification link. Treat the evidence as decision support—not a guarantee.
What leaves my browser?
Only when you press scan: the captured card image is processed for recognition, the identified card details are sent to the pricing service, and a smaller crop may be relayed for visual listing search. Slabscout does not require an account or send your browsing history. See exactly what is processed in the privacy policy.
Does it handle slabs and parallels?
Yes. Slab grades are priced separately, and detected parallels are matched against their own evidence instead of being blended into the base card. When the variant cannot be verified, Slabscout tells you to review it.
Is this a Whatnot thing?
No — it's an independent tool made by collectors. Not affiliated with Whatnot, eBay, or PSA.