GET/comc/categoriesapiKey1 credit/request
Returns COMC's (comc.com) closed, top-level category/sport taxonomy -- the discovery endpoint for the search endpoint's `category` param. Every slug is the exact path segment comc.com's own site uses.
Takes no parameters.
Sampled 14 Oct 2026: 23 items. Filled in every item: slug, name, kind. In the sample: kind: sports (13), trading (5), gaming (4) and 1 more; name: “Baseball Cards” and 22 other values.
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GET/comc/listingapiKey4 credits/request
Returns one card+grade combination's full detail from COMC (comc.com): card identity and every seller's individual for-sale copy (owner, item id, price). handle is the value returned by comc_search's CardSummary.handle field (or the equivalent comc.com card URL path).
Required: handle.
Sampled 14 Oct 2026: 1 item. Filled in every item: item_id, owner, owner_url, price. In the sample: owner_url: comc.com.
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GET/comc/searchapiKey4 credits/request
Searches or browses COMC's (comc.com) live consignment marketplace for graded and ungraded trading cards. Each result row is a distinct card+grade combination (COMC's own category/search grid aggregates every seller's copy under one row); chain a row's handle into the listing endpoint for the per-seller breakdown. At least one of category or query is typically useful, but both are optional -- omitting both searches all categories.
Optional: category, query, sort (13 allowed values: r, c, o, n, b, h, l, d, p, q, s, m, e), attributes, condition (4 allowed values: aUngraded, aGraded, aAftermarketAuto, aAfterAutoGraded), page, page_size (15 allowed values: 6, 8, 10, 12, 14, 15, 16, 18, 20, 24, 30, 40, 50, 64, 100).
Sampled 14 Oct 2026: 20 items. Filled in every item: handle, url, year, set_description, card_number, subject, image_url, price. Not in every item: grade_label (4). In the sample: year: 1,953 to 2,026, median 2,022; set_description: “Panini Donruss - Signature Series - Red” and 16 other values; url: comc.com; card_number: “SS-ZV” and 19 other values; subject: “Zac Veen #/99” and 19 other values; image_url: img.comc.com; price: 0.99 to 35.33, median 7.7.
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COMC API endpoints