FAQ

Is Zukan a hosted public account service?

It is self-hosted software. Accounts and available providers are controlled by the operator of the server you use.

Can several people use the same server?

Yes. Catalogs and prices are shared; personal collections are separate. Use separate accounts for separate inventories.

Why is the same card listed more than once?

A logical card can have many printings, and owned copies are split further by finish, condition and language. Regional catalogs can represent different markets independently.

Does changing interface language change my card's language?

No. Interface localization, image display preference, inventory language and OCR script are separate settings.

Can I scan without internet access?

Text recognition runs locally, but matching and collection changes require a reachable Zukan server. A LAN server can be reachable without public internet, but missing-card lookups and new upstream data need their sources.

Is this visual recognition of the illustration?

The documented pipeline uses OCR text and game-specific matching. It is not a trained illustration-recognition model.

Why do prices differ from a marketplace page?

Different printing/finish/source, generic condition/language treatment, quote age and external data coverage can all matter. Check the actual selected edition and source. Manual prices are valuation overrides.

Why did my old history chart change after adding cards?

It prices today's holdings with historical quotes. It does not track historical inventory quantities or invested cash.

Does CSV set mode erase everything not listed?

No. It replaces quantities only for listed variants. Blank notes/manual prices do not clear existing values.

Can deleting an item be undone?

Stock adjustments can be reversed subject to current quantity. Permanent item deletion also removes its transaction history and has no stock-undo recovery.

Why is my SSO collection empty on Android?

Check the same server, issuer and account identity. Web and mobile clients must resolve to the same issuer/subject. Matching email is insufficient.

Can I change SSO credentials in Zukan?

Use Edit my profile to open the configured provider page. The identity provider owns those changes.

Is Whatever TCG supported?

If no provider is registered for that game in the documented version, then no. See Supported games and sources for the actual list.

Is an import finished when the web UI starts?

Not necessarily. The worker imports catalogs independently. Check Data sync and worker logs.

Why does the API say maintenance while health says OK?

The health response can remain reachable with status: ok while also carrying a maintenance object. Inspect that field and the user-facing 503 state.

Do I need a GitHub token to pull the released image?

The project README documents the GHCR package as public. A stale Compose comment mentions private access; it should not be treated as a normal installation requirement.