Built for live-selling Magic cards
Whatnot inventory and show-prep software for MTG sellers
Toploader OS helps Magic: The Gathering sellers manage inventory, choose exact printings, price stock, prepare Whatnot shows, export listing CSVs, reconcile sales and track profit from one desktop app.
Scryfall print lookup
Whatnot CSV export
Show Builder
Sales reconciliation
Toploader OS has been an incredible help to track and sort my collection. As a selling tool it has been invaluable in the amount of time and process it has saved. Very intuitive to use and getting very regular updates with new features.
I look forward greatly to the mobile app!
So check here, simply put, Toploader has added thousands of pounds of turnover to our business. Scanning, sorting, pricing and listing items takes hours instead of days (or weeks for bigger collections).
No other tool or system has made this much of an impact and it has quite literally, paid for iteself hundereds of times over since we started using it. It is a game changer and a no brainer. It is invaluable.
TopLoader has streamlined my selling on Whatnot! It saves me so much time which allows me to focus on other aspects of my business! I will never go back to how I did things before!
Steady, reliable, and genuinely helpful. Toploader OS keeps your workflow organised without getting in the way — quick scans, tidy sorting, and a clean layout that makes selling feel easier. The regular updates and upgrades show real care, and being able to talk directly with the inventor gives the whole experience a personal, community‑driven feel. It’s a quiet upgrade that makes your day run smoother and your stream feel more controlled.
Seller operating system
One workflow from stock intake to post-show profit.
Use one tool for the jobs that usually live across spreadsheets, browser tabs, export templates and post-stream notes.
Inventory database
Track MTG singles, booster packs, sealed boxes, graded cards, sleeves, deck boxes, playmats, bundles and seller accessories.
Exact card printings
Search Scryfall, choose the correct set, collector number, finish and foil treatment, then keep image and market metadata attached.
Pricing tools
Use marketplace-aware target prices, configurable Whatnot fees, rounding modes, bundle pricing, surprise sets and pack-break calculators.
Whatnot exports
Generate listing CSVs with product titles, descriptions, quantities, conditions, shipping profiles, prices and public image URLs.
Show Builder
Create show batches, allocate quantities, apply export presets, preview listing value, estimate payout and export show-specific CSVs.
Reconciliation
Map Whatnot sold item names back to inventory, deduct stock, log sales and review gross revenue, payout and net profit.
Workflow
Built around how Whatnot sellers actually work.
Import or add stock
Bring in ManaBox CSVs, add singles with Scryfall lookup, or create sealed and accessory product lines with cost and margin pricing.
Price with intent
Use market prices, manual targets, percentage-of-market bulk pricing or fee-aware calculators to set listing prices before the show.
Build the show
Create a show, select stock, allocate quantities, apply presets and check readiness before exporting a Whatnot CSV.
Reconcile afterwards
Import or enter sold quantities, deduct inventory, log sales and review performance without rebuilding a spreadsheet.
Why sellers choose Toploader OS
The app is designed for repeatable live-selling workflows: finding the exact card, creating clean listings, knowing your payout and closing the loop after a stream.
Use separate inventory profiles for different stock collections.
Preview missing images, missing prices, zero quantity and export blockers before listing.
Keep manual target prices separate from saved market values, so deliberate stream pricing is not overwritten by refreshes.
Track both sales performance and stock health over time.
Explore Toploader OS
Whatnot CSV Export
Create marketplace-ready CSVs for MTG singles, sealed products and accessories.
MTG Inventory Software
Manage cards and products with exact print metadata and seller-focused stock tools.
Show Builder
Plan shows, preview payout and export show-specific listing files.
Sales Reconciliation
Deduct stock and log profit after your livestream.
Pricing
Free to start. Pro when your workflow grows.
Start with a free inventory workflow, then unlock automation-heavy seller tools when you need imports, exports, reconciliation and bulk workflows.
Free starter edition
Free
up to 100 inventory items
Build and edit your inventory.
Use Scryfall lookup for singles.
Test the workflow before upgrading.
Toploader OS Pro
Pro
seller workflows unlocked
ManaBox imports and marketplace exports.
Show Builder, reconciliation and analytics.
Multiple inventories, bulk edits and advanced pricing.
FAQ
Questions sellers ask before switching.
Is Toploader OS only for single cards?
No. Singles get the Scryfall-powered workflow, while sealed products and accessories use cost, margin and listing defaults.
Does it upload directly to Whatnot?
Toploader OS prepares CSV files for your seller workflow. You still review and upload through the marketplace tools you use.
Can I keep using Yoast on this site?
Yes. The theme leaves SEO titles, meta descriptions, Open Graph tags and most schema to Yoast when Yoast is active.
Is Toploader OS affiliated with Whatnot or Wizards of the Coast?
No. It is an independent seller tool. Marketplace names, game names and trademarks belong to their respective owners.
Ready when you are
Turn your seller workflow into a repeatable system.
Download the free edition, build a test inventory and upgrade to Pro when you are ready to automate imports, exports and reconciliation.