Know the card.
Keep the books.
Let the agents work.
The operating stack for the card business: one exact identity for each printed version of a card, one record for each dollar that touches it, and agents that do the work on the marketplaces.
Running today: identity for football at pkid.cards, and agents on a real COMC inventory.
Built for the dealers who move the hobby, the marketplaces they sell through, and the auction houses, graders and pricing tools that keep score.
One card, one record, start to finish
Today the hobby runs on titles that don't agree, spreadsheets nobody trusts and hours of repricing by hand. Here is the same Orange /199 moving through one connected system.
- 1
Identify
2017 Donruss Optic#177Patrick Mahomes II/199Rated Rookies · Orange081/199Typed from what's printed on it, it resolves to one exact version: one of 26 versions of #177 on record.
Live today - 2
Record
Bought in a lot, its share of the cost plus grading and shipping becomes its basis in the book.
Engine built - 3
Work
The agents price it against the other copies and real sales, and hold it while the player is hot.
Live today - 4
Close the loop
When it sells, the sale posts to the book on its own, net of fees, against the card's own cost.
Connecting
One card number is rarely one card
Every marketplace, checklist and seller names a card differently, so comps mix parallels and a /25 gets priced off the base. pkid.cards gives each printed version its own record: release, insert, parallel and print run. Records say what's known and mark what isn't. Nothing is guessed to fill a gap.
1 exact match on pkid.cards, out of 26 versions of #177:
Your inventory, worked around the clock
The agents run inside your own signed-in browser. They reprice against the live market, clear dead stock, send the right cards to eBay auction, and surface underpriced buys the minute they're listed. The receipt is one real day on a real COMC inventory.
It learns from its own record
It read 510 sales and 194 auctions of the account's history, then measured 31 of those auctions against outside sold comps: a median close of 0.69× and a bottom quarter of 0.38×. So it sends a card to auction only when even a bottom-quarter close still nets 60% of what the card would net on COMC.
A real ledger for a card business
Lots bought for four cards and carried by the rest, grading fees on some, consignment in, splits out, five places to sell. By April nobody knows what anything cost. The book keeps each dollar against the card it belongs to.
| Date | Entry | Debit | Credit |
|---|---|---|---|
| Sep 12 | Lot of 40 bought at a show | 1,200.00 | |
| Sep 12 | Cash | 1,200.00 | |
| Sep 13 | Basis allocated: Mahomes Optic Orange /199 | 310.00 | |
| Sep 20 | Grading fee added to its basis | 25.00 | |
| Oct 14 | Sold on eBay, net of fees | 742.20 | |
| Oct 14 | Cost of goods relieved | 335.00 |
- Cost basis that survives volume
- Lot cost allocated across the cards in the lot, landed costs added, each lot's basis locked once settled.
- Consignment, settled exactly
- Cards sold for others and buys split with a partner settle to the dollar after the sale.
- History you can trust
- A correction posts as a reversal. Nothing is edited in place.
- Your books stay yours
- Each business's records are kept apart by the database itself.
Engine built and tested against PostgreSQL, 39 schema migrations. First dealer pilots next.
Built by someone who has closed the books at scale
Kendall (@thekonamicard) spent his career making big companies' books reconcile, then became a card dealer. The book is built like an enterprise ledger, and the agents run on his own inventory first.
| When | Role | What he ran |
|---|---|---|
| Early career | Reconciliation consultantReconciling ledgers across global systems for large companies | Reconciling ledgers across global systems for large companies |
| Years | Corporate financial systemsERP, reporting, audit and global consolidations | ERP, reporting, audit and global consolidations |
| Since 2021 | Card dealerFull time; the agents work his inventory every day | Full time; the agents work his inventory every day |
The identity layer for sports cards
Marketplaces, auction houses, graders and pricing tools each keep their own name for the same card, so sales land on the wrong parallel and inventory can't be matched across systems. The identity layer is one exact, stable record per printed version that all of them can resolve to.
- Marketplace search
- Comps and pricing
- Certs and population
- Inventory and consignment
The typed search resolves live on pkid.cards today. Listing titles and printed serials are next in line.
Each record carries its release, insert, parallel and print run, and the ladder of versions behind its card number. Access is by API, by arrangement, so your search, comps and inventory all point at the same card.
Get in touch
Partnerships, platform integrations and the first group of high-volume dealers. Tell us who you are and what you want first. Kendall answers each one himself.
Prefer Instagram? Message @thekonamicard.