Try any of 3860 endpoints — live.
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How a card's graded population has grown: BGS and SGC weekly history for the last year with every grade count, gems and gem rate each week; PSA weekly total graded for the last year plus graded past month, prior month, past-month gem rate, 30-day momentum, last gem date and the most recent cert.
The card's GemRate id from `search` (40 characters) or its gemrate.com/card/… URL.
Instead of gemrate_id: free text; the best match is used and reported in `match`.
Which grader's history. CGC history is not published by the site.
With grader bgs/sgc and no gemrate_id: the grader's own card fields (set_pop rows carry them as trend_params).
With the fields form: the grader's category slug (e.g. tcg-cards, basketball-cards).
With the fields form: the grader's own set name.
With the fields form: the grader's own card name.
With the fields form: card number as the grader lists it.
With the fields form: parallel / variety, if any.
curl -X POST https://api.reefapi.com/gemrate/v1/card_history \
-H "x-api-key: $REEF_KEY" \
-H "content-type: application/json" \
-d '{"gemrate_id":"ffb8699bb7f435eff4e9761f8e29358e351d777e"}'Press Send request to see the live result here.
Not sure what to send? Ask Reef AIWhat you can run here, without an account
ReefAPI is one HTTP gateway to 632 live web-data APIs covering 3860 endpoints across 13 categories. Every endpoint answers with the same JSON envelope, so one integration reaches all of them. Each response reports what it cost and when the source was read.
No signup, no API key and no card are required to try an endpoint on this page. Anonymous calls run on a shared demo key, capped at 15 calls per hour per visitor. Pick an API, fill the parameters and the real response comes back from the live source, not from a canned sample. A free account lifts the cap and gives you 1,000 credits and your own key.
Browse every API in the catalog, read an endpoint's fields and example response in the docs, or see per-call credit costs on the pricing page.
Coverage by category
| ecommerce | 350 |
| classifieds | 116 |
| real-estate | 29 |
| media | 25 |
| utilities | 18 |
| jobs | 18 |
| developer-tools | 18 |
| reviews | 15 |
| social | 15 |
| search-seo | 11 |
| travel | 8 |
| other | 5 |
| finance | 4 |