Import a real catalog
Bring in hundreds of lots by CSV with clear row-level validation and downloadable error reports.
Auction software for serious sellers
Your auction house.Your bidders. Your brand.
Build a polished online auction without fighting clumsy software. Drag in your images, arrange your lots, and launch a branded bidder experience that feels at home beside the world's leading auction houses.
Drag-and-drop imagesLive bidder insightsAuction-house presentation
Live auction
The Fall Collector Event
LOT 052Current bid
$2,450
18 bids · 7 bidders
Closes in 02:14:38
Your maximum
Private & protected
Place bid
Closing activity
Every action recorded
Auction software that gets out of your way
Easy enough for the first catalog. Powerful enough for closing night.
Other platforms make sellers adapt to dense menus and disconnected tools. MintEngine follows the way you already work: catalog, images, review, publish, and understand the response.
Drop in every image at once
Drag in a folder of front and back images, then reorder or replace them visually. MintEngine keeps every photo with the right lot.
Review before going live
Preview the buyer experience, resolve readiness issues, and publish the complete auction in one step.
Bring your bidders
Validate your customer list, recognize existing accounts, and invite new buyers to claim theirs.
Know who is engaged
See active bidders, watchers, bidding momentum, lot interest, invoices, and a readable audit history from one dashboard.
Built for closing night
Atomic proxy bidding, retry protection, tenant isolation, and per-lot soft close protect every result.
Cataloging, without the busywork
Drag. Drop. Done.
Drop an entire folder into your auction. MintEngine matches images to lots, shows the results immediately, and lets you rearrange everything with a simple drag. No renaming maze. No opening every record. No wondering which image went where.
Upload front and back images in one pass
Reorder photos with a familiar drag handle
See missing images and mismatches before publishing
Lot image manager
36 images matched to 18 lots
Add images
LOT 051
Front image
LOT 052
Front image
LOT 053
Front image
Drop more images anywhere
Your bidder room, at a glance
See who is bidding—and who is almost ready.
Your dashboard separates bidding from watching, shows momentum across the sale, and helps you spot the lots and people that deserve attention before the hammer falls.
Seller dashboard
Fall Collector Event
Registered bidders
184
+22 this week
Active bidders
47
26% participating
Watching only
91
Warm audience
Bids placed
326
+18% today
Bidding momentum
Bid activity over the last 12 hours
8amNow
Most engaged bidders
Bids and watched lots
JM
Jordan M.
14 bids · 6 watched
SR
Sam R.
9 bids · 11 watched
AK
Alex K.
7 bids · 8 watched
Every screen is a bidding room
Made for the phone already in your bidder's hand.
Bidders can browse sharp card images, watch lots, place protected bids, and follow closing activity from any screen. Sellers get the same clear controls on a laptop, tablet, or phone—without forcing anyone to install an app.
Fast, touch-friendly bidding
Responsive card galleries
Live prices and countdowns
No app download required
Live auction
Fall Collector Event
LOT 49
$1,180
LOT 50
$720
LOT 51
$2,850
LOT 52
$940
LOT 052Current bid
$2,850
02:14:38
Place bid
18 watching
A clean seller path
From spreadsheet to bidding in four deliberate steps.
Drafts stay private. Validation happens before publication. The seller remains in control of when buyers see the auction.
See the seller workflow- 01
Create
Set your auction schedule, storefront, and selling terms.
- 02
Import
Upload your lot catalog and front/back imagery in bulk.
- 03
Review
Preview every lot and resolve issues before buyers see them.
- 04
Publish
Open bidding, monitor activity, and close with a complete record.
For auction houses and collectible sellers
Run the auction your brand deserves.
Start with a controlled pilot using your catalog, your images, and your bidders.
Here to buy?
Browse active auctions, watch lots, bid securely, and keep invoices and activity in one account.