Why cards, AI and blockchain
Collectors already treat their cards as a portfolio, but the tools don't. Values are guessed, data is locked in one app, and nobody shows how a number was reached. We think the fix is two honest layers: AI to read and reconcile what's scattered across exports and photos, and the blockchain to prove what's graded, vaulted and owned, without trusting any one company's database.
What the blockchain is actually for
It doesn't guarantee the physical card, that's still a vault you trust. What it does is prove ownership and provenance: who owns a card, and the unbroken record of who owned it before, that no single company controls. That's the part worth putting on-chain, and it's the part we read today and may let you write tomorrow.
What you'll find here
- The market. What's happening in cards today: the hobby's news (Cardlines and PokeBeach) and the day's best pulls from the card subreddits, gathered every two hours, each with the cards it names, how many copies are on-chain, the lowest live ask, and an eBay search. Below that, deals, and every card vaulted on the Solana chain by category.
- Deals, and a public record of them. Each night we price a shortlist of on-chain listings against what the same card and grade sell for elsewhere, and flag the asks that sit under it. Every flag is scored 30 and 90 days later, in public, so you can see whether the gaps were real. See every listing we checked →
- Your portfolio. Value, cost and return, the honest range across every source, and what moved over 7 days to all-time, card by card. Exports from CollX and Card Ladder in a shared folder are read every night, so your history keeps itself up to date.
- A watch list. Cards you don't own yet, priced by the same crawl, with a bell when one is found at or under your target. In the app only, never email.
- Your data, free to take. Every card, with its values and where they came from, as a CSV you can download any time.
You add your cards
Photograph a card front and back, or drop in any export, spreadsheet, even a handwritten ledger. The model reads it: name, year, set, number, and on a slab the grade and cert. It runs on our own AI stack, so there's no per-scan fee, and its read is shown so you can correct it.
Limit: raw cards without a label are harder than graded slabs, and a messy source can need a second look.
We build an honest portfolio
Your cards become positions: value, cost basis, and real return. Return is only counted on cards where you logged what you paid, so the number is true, not flattering, and it can read negative while the collection is worth more than you think.
Limit: values from your exports are one source each (CollX, Card Ladder). The prices we find online sit beside them as a range, never blended in silently.
We anchor them on-chain
We keep an index of every card vaulted and tokenized on Solana through Collector Crypt and Phygitals, more than 300,000 of them: graded slabs, raw cards and sealed boxes. It's caught up from the chain every half hour, so a sale, a new vaulting or a redemption shows up within the half hour, and anything you open is read live. Your cards are matched to it by year, number and name, every match linked to the explorer with a grade-by-grader population, and the players you collect most come with the copies on-chain you don't own yet.
Limit: parallels share a card number, so a match is to the card, not the exact refractor; and the population counts tokenized copies, not the full PSA/CGC census.
And we show our work
Every figure carries its own caveat, every match links to its source on-chain, and where we can't know something, we say so. If a number looks too good, we'd rather explain why than show it. That transparency is the point of a lab.
How we estimate a value. We search the open web for this exact card at its condition (the parallel, and the grade if it's slabbed) and collect the prices we find in listings and price guides. Each price is then read against the card: its grade, number, year and parallel. Only the ones that fit make the range, shown as the median with the lowest and highest beside it, and every price is listed with a link to where we found it; the ones left out stay listed with the reason. Raw cards never borrow graded prices, and a slab only takes prices for its own grade. We skip sources whose terms don't allow their prices to be shown in an app. When we can't find a price, we say so instead of guessing. It's an estimate, not a quote or an appraisal.
cardstock is built by Kumori Lab. Nothing here is financial advice.