Skip to content
ZEROPOP

ZeroPop API · Coming soon

Card grading, prices and data, as an API.

The ZeroPop API is a developer platform for trading cards and sports cards. It will offer AI card grading from photos, card price data built on observed market prices, and a searchable card database, the same three systems that run the ZeroPop apps. It is in development. Tell us what you would build and we will email you when there is something to try.

Get early access

One email when it is ready to try. Pick what you need.

What do you want to build with?

What it will offer

Three APIs, one card identity

Each part works on its own, and they share one catalog: the card a photo is identified as is the card that gets a grade and the card that has a price.

Grading API

Grade a card from two photos

Send the front and back of a card and get back the same grade the ZeroPop apps show collectors: four sub-grades on a 1 to 10 scale and an overall grade worked out from them.

  • Corners, edges, surface and centering sub-grades, plus the overall grade
  • Centering measured from the photo, left to right and top to bottom, front and back
  • The defects behind the grade, each tied to where it sits on the card
  • Trading card games and sports cards, raw cards photographed on a phone

Pricing data API

What a card is worth, from observed prices

Look up a card and get its current market price and price history. Every figure is an observed price for that exact printing. We do not publish estimates or model guesses, and a printing with no evidence of its own comes back unpriced.

  • Current market price per printing, with the date it was observed
  • Price history for charts and movers
  • Trading card games and sports cards
  • No invented numbers: no price is better than a wrong one

Card database API

A card catalog you can build on

Search cards by name, resolve a card to one exact printing, and walk whole sets. It is the catalog behind ZeroPop's scanner, set tracker and card pages.

  • Search by name, then narrow by number, set, year, variant and finish
  • Sets with their release dates, sizes and full checklists
  • Card identification: a photo in, the matching catalog card out
  • Real collector scans of a card, with the grade each one received

Who it is for

What people want to build with it

Collection and portfolio apps
Identify what a user owns, show what it is worth, and track it over time.
Card shops and buylists
Check condition at the counter and price a stack against the market instead of a memory.
Marketplaces and listing tools
Fill in the title, set, number and condition from a photo, so listings are right the first time.
AI agents and assistants
Give a model real card identity and real prices to answer with, instead of what it remembers.

Available today

Start with the free MCP server

While the API platform is in development, ZeroPop already runs a public, read-only Model Context Protocol server. It gives Claude and other AI clients four tools over the same catalog: search cards, get a card with its price history and community grades, get a set, and get recent scans from a set. It needs no API key and no account.

Set up the MCP serverOpenAPI connector

Want to see the grading itself first? Grade a card free in your browser, no account needed, or read how AI card grading works.

FAQ

ZeroPop API questions

What is the ZeroPop API?

The ZeroPop API is a developer platform, coming soon, that offers three things over HTTPS: AI card grading from photos, trading card price data, and a searchable card database. It is the same grading, pricing and catalog that run the ZeroPop iOS, Android and web apps.

Is the ZeroPop API available now?

Not yet. The API platform is in development and this page is where to register interest. What is available today is ZeroPop's free, read-only MCP server and its OpenAPI connector document, which let an AI assistant look up cards, sets, prices and community grades.

What does the card grading API return?

A grade for the card in the photos: sub-grades for corners, edges, surface and centering on a 1 to 10 scale, an overall grade computed from those sub-grades, the centering measurements, and the defects that explain the grade.

Which cards will the API cover?

The same cards ZeroPop covers in its apps: trading card games such as Pokemon, Magic: The Gathering, Yu-Gi-Oh, One Piece and Disney Lorcana, and sports cards including baseball, basketball, football, hockey and soccer.

Where does the pricing data come from?

From observed market prices for the exact printing of a card. ZeroPop does not publish AI-estimated prices and does not derive one printing's price from another with a multiplier, so a card with no observed price is returned as unpriced.

How do I get access?

Leave your email on this page and say which parts you want: grading, pricing data, or the card database. We will email you when there is something to try.

Building something with cards?

Tell us which parts you need. It shapes what ships first.

I'm interested