Grading you can trust — and actually verify
Collectors deserve more than a number in a slab. MAS Grading is built on transparency: witnessed certification, a live public population registry, instant online verification, and grading you can watch happen in person.
Witnessed certification
MAS built its name on certification you can witness — no black box. It's the same philosophy behind every MAS grade.
What is witnessed certification?On-site convention grading
MAS is bringing professional grading directly to card shows nationwide — hand over your cards, watch the process, and pick them up the same day.
Read the announcementTransparent live population
Every MAS card is tracked in a live, public population registry, so you can see exactly how rare your card's condition truly is.
How population worksInstant online verification
Anyone, anywhere, can confirm a MAS grade in seconds by entering the cert number — no account, no friction.
Verify a certTamper-evident slabs
Each card is sealed in an ultrasonically welded, tamper-evident archival holder with a unique, verifiable cert number.
The MAS standardBacked by MAS Certified, Inc.
MAS Grading is operated by MAS Certified, Inc. — a trusted name collectors, dealers, and auction houses already rely on.
About MAS GradingProtect what your collection is worth
A MAS grade does more than assign a number — it makes your card's condition provable, portable, and trusted the moment you want to sell, trade, or insure it. Submit online today, or verify any existing MAS cert in seconds.