GemRate Partner API

Access the most comprehensive grading population dataset across PSA, Beckett, SGC, and CGC — unified and updated daily.

What You Can Build

A few ways partners are putting GemRate data to work.

Show populations, gem rates, and cert details across PSA, BGS, SGC, and CGC to increase buyer confidence and conversion.

Use GemRate universal IDs to map cards across graders and marketplaces – unlocking accurate comps, pricing engines, and scalable analytics.

insights

Identify rarity, quantify gem potential, understand expected value, and build tools that guide buy and sell decisions with an information edge.

Search our database live. Results come back from all major grading companies in a single call.

GET /v1/universal-cert-lookup

Look up any graded card by its cert/serial number across PSA, Beckett, SGC, CGC.

Cert #

Grader

Enter a cert number, select a grader, and click Look Up.

POST /v1/hybrid-population-data

Returns population data for a given card across all major graders. Includes grade distribution, gem rates and historical changes.

GemRate ID

Enter a gemrate_id and click Go to see population data.

GET /v1/item_search

Search for a card by name or player and include set or parallel for more narrow results.

Query

Enter a search term and click Search to see live results.

Have a question or want to see the API in action? Send us a message or book a demo with our team to walk through your use case and pricing.