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Frequently Asked Questions
How accurate is AI grading?
It is a pre-screen, not a prediction. The model scores centering, corners, edges and surface against PSA-style criteria from your photos. We have not yet published a validated accuracy study; users who submit to PSA can report the returned grade from their account, and we publish those aggregates on the methodology page as they come in.
Are my card images stored?
Full-resolution images are processed in-memory by our AI and discarded after grading. A compressed thumbnail and your grade data are saved to your account so you can access your grade history on any device.
Can I get a refund on credits?
Credits are non-refundable once purchased. However, if you experience a technical issue that consumed a credit without providing a grade, contact us and we'll restore it.
Do you grade all card types?
We support trading cards from all major TCGs including Pokémon, Magic: The Gathering, Yu-Gi-Oh!, One Piece, Lorcana, and all major sports card brands (Topps, Panini, Upper Deck).
Is this affiliated with PSA, BGS, or CGC?
No. Master Grade is an independent AI tool and is not affiliated with, endorsed by, or a replacement for any official grading service.