The inventory system that runs a real card business.

I sell thousands of cards a month on eBay and TCGplayer, and I built this to run it. Free for everyone until January 31, 2027. No credit card.

See what it does
inventory.leumascc.com · Private Access
Now open. Create your free account on the Register tab, no credit card.
1,038,976
Active eBay Listings
2,787,511
Cards Tracked
101,920
Combine Listings Managed
281,469
Orders Tracked
$1,333K
2026 Sales Tracked
Live, platform-wide numbers across every seller on the system · updated in real time
55
Daily active users
active in the last 24 hours
55today so far
53yesterday
517-day average
6714-day peak
last 14 days
A user counts once per day for any action: a click, a page navigation or a login. Days are UTC. Updates every minute.
What it does

Everything I needed to run the business, in one place.

Every feature here is live in my own store today — not a roadmap promise. This is the system that handles thousands of cards a month.

Live eBay sync

Listings, orders, and fees pulled straight from eBay's Trading and Finances APIs, with webhooks for near-real-time updates. Your numbers match eBay, automatically. Works with both eBay.com (US) and eBay.ca (Canada), priced in your own currency, USD or CAD.

Live now

Combine listings

Merge a pile of the same card into one listing and keep a full breadcrumb of what went in. Pick lists route by storage location so you find every card fast.

Live now

TCGplayer cross-listing

Export to TCGplayer with delta-aware quantity sync, and guards that catch a mispriced card before it sells for a fraction of its value.

Live now

One inventory, every channel

Your inventory is the source of truth. List, sell, and reconcile the same stock across eBay, TCGplayer, ManaPool, CardTrader, Misprint, and your own Shopify or WooCommerce store without overselling a card you only own once. ManaPool and CardTrader orders arrive in real time and their prices can follow the market on their own.

Live now

US & Canada

Built for sellers in both countries. eBay.com and eBay.ca accounts connect the same way, with native CAD pricing for Canadian sellers and your own ship-from and return address.

Live now

Lot & profit tracking

Real per-lot profit and loss, split down to the child SKU, with a full audit log. Know what each box actually made — not a rounded guess.

Live now

Automated repricing

Set your own pricing rules and let nightly market-based repricing keep your listings competitive while protecting your floor.

Live now

Card shows & buy-back

Run a card show from your phone — sell, trade, and buy on the table. Take in bulk collections with rate-based quotes that flow straight into inventory.

Live now

Reporting & audit trail

Dashboards, year-over-year, dead-stock aging, and a revert path on every bulk operation. Trust your own numbers when it counts.

Live now

Pick & pack

One pick list for every marketplace. Each line shows the card photo, the exact box it lives in, and the order it belongs to. Pick one card at a time on your phone, filter by marketplace, and print or export the sheet.

Live now

Shipping labels

Buy USPS Priority and Ground Advantage labels without leaving the app, and close the order out with the tracking number attached.

Live now

Photo scanner

Photograph a stack of cards and the scanner identifies each one across 49 card games, picks the exact printing and condition, and sends it to inventory with a listing title ready to go. It learns from every correction you make.

Live now

Team access

Give a helper, a packer, or a partner their own login with only the pages you choose. Money and investment views stay hidden unless you grant them.

Live now

Works on your phone

A phone layout built for the table and the packing bench: run a show, pick orders, scan cards, and check your numbers without a laptop.

Live now

Ask Leumas

An assistant inside the app that knows the system. Ask how a feature works or why a number looks the way it does and get an answer from your own data.

Live now
Where it's going

Built feature by feature — and still building.

What's connected today, and what's next. Priorities come from real seller demand, not a pitch deck.

Connected today

eBay · TCGplayer · ManaPool · CardTrader · Misprint · Shopify · WooCommerce

Full eBay integration for the US and Canada, TCGplayer cross-listing, ManaPool and CardTrader with real-time orders, Misprint listings and orders, your own Shopify or WooCommerce store kept in sync with the same inventory, in-app shipping labels, a community on Discord, and the build journey on YouTube.

Open now

Photo scanner for everyone

Identify a stack of cards from a photo. Open to every seller.

Next

More marketplaces

Mercari, Cardmarket (EU), and COMC are on deck once the multi-tenant core is rock solid.

Next

Sports cards at scale

A first-party sports catalog with visual parallel identification — the part no free data source does well.

See it in action

Watch the system get built on the Leumas Card Craze YouTube channel.

FAQ

Questions, answered straight.

If yours isn't here, ask me on Discord.

Is it really free?
Yes — Leumas Live is free for everyone through January 31, 2027, no credit card required. It's a beta: it's solid and I'm hardening it every day, so please review your listings after each sync. Create your free account on the Register tab to get started.
How is my inventory data isolated from other users?
Every business table (inventory, orders, combines, lots) carries a user_id and a row-level security policy enforced at the database layer, not in app code. So even if a future bug forgot to filter by user, the database itself would refuse to hand back another seller's row. That's the foundation everything else is built on, and it's why I could open signups to everyone.
What data do you share with eBay or TCGplayer?
None. Leumas is a client of those marketplaces, not a data broker for them. Your inventory and sales data lives in a Postgres database only you can read. I use your eBay sign-in (OAuth, stored encrypted) to sync your own listings and orders — and I never aggregate or sell your data to anyone.
What if I'm coming from a spreadsheet?
Onboarding imports your active eBay listings automatically through eBay's API — no spreadsheet upload needed. Past sales backfill from eBay's Finances API, and TCGplayer comes in by CSV. I migrated thousands of my own listings off spreadsheets when I built this, so the import flow is made for the messy reality of a high-volume operation.
Which marketplaces and countries do you support?
Yes. eBay (US and Canada), TCGplayer, ManaPool, CardTrader, Shopify, and WooCommerce are all live today. Mercari, Cardmarket (EU), and COMC are on the roadmap. If your business needs a specific marketplace, tell me on Discord — demand sets my priorities.
Can I export my data if I leave?
Yes, always. You can export your full inventory, orders, combines, lots, and audit log to CSV any time, right from the app. I don't believe in data lock-in — if Leumas ever stops working for you, your data leaves with you in a format you can take anywhere.
Who is behind Leumas Live?
That's me — Sam, eBay seller leumas1993, moving high volumes of Pokémon, baseball, basketball, football, Yu-Gi-Oh, and One Piece. Leumas started as my own inventory system after years of fighting spreadsheets, sync gaps, and paid software that didn't get how card sellers actually work. There's more in the founder story below.
Founder story

Built by a high-volume seller, not a VC-funded startup.

Hi, I'm Sam — eBay seller leumas1993. I move thousands of Pokémon, baseball, basketball, football, Yu-Gi-Oh, and One Piece cards every month across eBay and TCGplayer.

Leumas Live started as my own inventory system. Spreadsheets broke around 5,000 listings, and the paid tools I tried didn't understand combine listings, lot tracking, or the audit trails I needed to trust my own numbers. So I built what I needed, one feature at a time.

As you read this, my own store is running 15,999 active listings, 5,232 combine listings, and 4,610 tracked orders — pulled live from the system right now. It runs my entire business. Next, it runs yours.

Every feature here is one I built to fix a real problem in my own store — and one I still use every single day.

Community

Sellers are already in the room.

The conversation is live on Discord and YouTube — come watch the system get built in real time.

Contact

Come talk to me.

The fastest way to reach me is Discord. Prefer email? leumascardcraze@gmail.com.

Join the Discord

Questions, feature requests, and first dibs on beta access — straight from me.

Join the Discord →