Partner API from Mint Condition™

AI condition estimatesfor card platforms

Plug Mint Condition™ into your marketplace, POS, or inventory stack. Send a SKU plus front and back images. Get grades, overlays, and a report link back. Built for live traffic and large backfills.

Request access

AI condition estimates. Not certification. Not affiliated with PSA, BGS, or SGC.

api.mintconditiongrading.com
POST/v1/grade
{
  "sku": "MC-INV-10482",
  "images": {
    "front": "https://cdn.mcgrade.com/in/10482-f.jpg",
    "back": "https://cdn.mcgrade.com/in/10482-b.jpg"
  },
  "card": {
    "player": "Jackie Robinson",
    "year": 1948,
    "set": "Leaf",
    "number": "79",
    "category": "Baseball"
  }
}

Built for SCALE

Mint Condition™ grades for inventory, not one-off hobby scans.

Live Grading
30 sec per card with no limit.
Batched Grading
100,000s of cards per day.
Catalog Size
No limit. We're not fazed by 10M card inventories.

Works on real scans

Centering is trained on penny-sleeved cards and raw unprotected cards. We can still find the card when users scan through a sleeve.

  • Penny sleeve scans can still get accurate centering and defects when card surface is not covered by glare
  • Same API path whether your users sleeve stock or not

How it works

Same request format for every card you submit.

  1. 1

    Authenticate

    Send requests with a partner key. We issue keys after reviewing your access request.

  2. 2

    Submit a card

    POST the SKU, front and back image URLs, and any card details you already have.

  3. 3

    Get results

    We return the overall grade, subgrades, and overlay image URLs in one response.

What you get back

Grades, overlays, and a report link in one response.

  • Grades and subgrades

    Overall grade plus centering, corners, edges, and surface. Same breakdown dealers see in Vault.

  • Overlay images

    Image overlays you can show in your own UI so customers can see what drove the grade.

  • Report link

    A shareable report URL for each graded card, ready to open from your product.

These are estimates, not official PSA, BGS, or SGC grades.

Partner API

Request access

Tell us about your product. We review requests and follow up about sandbox keys and next steps.

AI condition estimates. Not certification. Not affiliated with PSA, BGS, or SGC.

Frequently asked questions

Who is the Partner API for?
Marketplaces, POS systems, inventory tools, and other B2B products that want to grade cards through an API. It is separate from credit packs on the website and iOS app.
Is this an official PSA, BGS, or SGC grade?
No. Mint Condition returns AI condition estimates for triage, listing context, and ops. Only grading companies issue official slab grades. Platforms still send keepers to PSA, BGS, or SGC when they want a cert.
Live vs bulk: what is the difference?
Live grading streams at 30 seconds per card with no limit. Batched grading handles 100,000s of cards per day for large backfills. Catalog size has no limit.
Do you support cards in penny sleeves?
Penny sleeve scans can still get accurate centering and defects when card surface is not covered by glare. Same API path whether your users sleeve stock or not.
How do images work?
You send front and back image URLs (or another upload flow we agree on). We return grade results and overlay image URLs you can show in your product.
Can dealers still grade on mintconditiongrading.com?
Yes. The site, iOS app, and Chrome extension stay available to try the product and grade your own shop inventory. The Partner API is for platforms that own the customer relationship.
How do I get access?
Submit the Request access form on this page. We review requests and follow up about sandbox keys and integration next steps.