Trading-card price and sales tracking across multiple auction houses
Altエンドポイントを使えば、「Trading-card price and sales tracking across multiple auction houses」をドキュメント化された入力とJSONレスポンスによる再現可能なAPIリクエストに変えられます。
Alt (alt.xyz) is a trading-card investment marketplace that aggregates live listings and completed sales across itself and several source auction houses -- eBay, Fanatics Collect, Pristine Auction, Goldin, CardHobby, and Memory Lane. Crawlora reads its public data layer directly: universal search and live-auction search, a completed-sales archive, one card design's full population report across every grading company, and Alt's own category-level price-trend index and biggest movers. Credential-free.
Extract Alt's aggregated trading-card marketplace search, completed sales archive, card-design population reports, and price-trend index as structured JSON.
エンドポイントファミリー
6
ドキュメント化されたパラメータ
39
サンプル数
9
ライブカタログスナップショット
稼働エンドポイント
9
メソッド
GET
必須パラメータ
12
スキーマ参照
9
{
"platform": "Alt",
"endpoint": "alt-search",
"method": "GET",
"path": "/alt/search",
"auth": "apiKey"
}ユースケース
Extract Alt's aggregated trading-card marketplace search, completed sales archive, card-design population reports, and price-trend index as structured JSON.
Altエンドポイントを使えば、「Trading-card price and sales tracking across multiple auction houses」をドキュメント化された入力とJSONレスポンスによる再現可能なAPIリクエストに変えられます。
Altエンドポイントを使えば、「Card-design population and rarity research」をドキュメント化された入力とJSONレスポンスによる再現可能なAPIリクエストに変えられます。
Altエンドポイントを使えば、「Card-market trend and mover monitoring」をドキュメント化された入力とJSONレスポンスによる再現可能なAPIリクエストに変えられます。
マネージド実行
以下の数値はすべて、稼働中のAltエンドポイントカタログから取得しています（エンドポイント9件、ドキュメント化されたリクエストパラメータ39個、公開レスポンススキーマ9件）。DocsとPlaygroundが参照しているカタログと同じものです。
Altのエンドポイントは9件、9つのリクエストファミリーに分類されています（Asset、Auctions、Card Searchほか6件）。
これらのAltエンドポイントには39個のリクエストパラメータがドキュメント化されており、うち12個が必須です。統合コードを書く前に入力仕様をすべて確認できます。
9件のAltエンドポイントのうち9件が実際のサンプルレスポンスを、9件がドキュメント化されたレスポンススキーマを備えています。最初のリクエストの前に実データの形に合わせて実装できます。
Altのエンドポイントは成功時のスキーマに加えてエラーレスポンス（400、404、429、500、503）もドキュメント化しています。ブロック、レート制限、レコード欠損は空データではなく型付きのエラーとして返ります。
Altのエンドポイントは9個のホスト型MCPツールとして提供されており、エージェントは同じパラメータと同じJSON契約のまま、追加の実装なしに同じルートを呼び出せます。
カバレッジマップ
これらのカードは稼働中のエンドポイントカタログから生成されるため、このページはDocsとPlaygroundが使うAPIサーフェスをそのまま反映します。
/alt/asset
/alt/auctions
/alt/card-search
/alt/categories
/alt/listing
/alt/market-trends
エンドポイントカタログ
/alt/searchSearches Alt's universal aggregator index -- live auction and fixed-price listings from Alt itself and every other source auction house its search carries (eBay, Fanatics Collect, Pristine Auction, Goldin, CardHobby, Memory Lane) -- by free-text query, category, source auction house, grading company, and listing type, in a caller-selected sort order. Only currently-live listings are returned; see alt-sold-listings for completed sales. Credential-free public data from Alt's own search backend. See alt-categories for the accepted category/auction_house/grading_company/listing_type/sort values.
レスポンスに関する注記
- `results[].auction_house` tells you the listing's actual source — a result is not necessarily an Alt listing. - `alt_value` (Alt's own estimated market value) is only populated for Alt's own native listings. - `bid_count`/`watch_count` reflect Alt's own aggregator tracking and may be `0` for external listings Alt doesn't track engagement on. Example response: ```json { "code": 200, "msg": "OK", "data": { "query": "michael jordan", "page": 1, "per_page": 24, "total": 40845, "results": [ { "id": "463ed059-bda6-4e9b-8c16-bd15cd79d9b8", "asset_id": "388b5eac-8130-4f27-93ab-f5be29cdac0f", "listing_id": "463ed059-bda6-4e9b-8c16-bd15cd79d9b8", "name": "2012 Upper Deck Jordan Unc Master Collection Sketch Autograph Michael Jordan #MJM7 /30", "subject": "Michael Jordan", "year": 2012, "brand": "Upper Deck Jordan Unc Master Collection", "variety": "Sketch Autograph", "card_number": "MJM7", "category": "BASKETBALL_CARDS", "auction_house": "Alt", "auction_name": "Sep 04 - Sep 17, 2026", "listing_type": "AUCTION", "grading_company": "BGS", "grade": "8.5", "serial": 3, "print_run": 30, "pop": 2, "price": 541.17, "alt_value": 3765.74, "bid_count": 6, "watch_count": 20, "expires_at": "2026-09-18 01:05:00+00:00", "images": [ {"position": "FRONT", "url": "https://onlyalt-images.s3.us-east-2.amazonaws.com/image/public/front.png"} ] } ] } } ```
MCPツール alt_search
/alt/listingOne listing's full public detail -- title, description, price/bid state, grading info, and images -- normalized across Alt's own native listings and its aggregated external listings. id and listing_type come from a prior alt-search/alt-auctions result. Not every response field applies to every listing_type -- see the field-level notes in this endpoint's markdown doc.
レスポンスに関する注記
- Not every field applies to every `listing_type`: `state` and `alt_value` are only present for Alt's own native listings (`AUCTION`/ `FIXED_PRICE`); `current_bid`, `bid_count`, `auction_ends_at`, and `external_url` are only present for external listings (`EXTERNAL_AUCTION`/`EXTERNAL_FIXED_PRICE`). - `external_url` is the click-through link back to the original listing on its source site (e.g. eBay). - `badges` (e.g. `1/1 Rare`, `Pop 1`) are only present for Alt's own native listings. - An `id`/`listing_type` combination Alt cannot resolve returns `404`. Example response (native Alt listing): ```json { "code": 200, "msg": "OK", "data": { "id": "58e5a6a5-a7ad-417f-8cda-ceffb226928c", "listing_type": "AUCTION", "auction_house": "Alt", "name": "2007 Exquisite Collection Dual Logoman Autographs Kobe Bryant/Lebron James #DL-BJ 1/1 PSA 8", "subject": "Kobe Bryant/Lebron James", "year": 2007, "brand": "Exquisite Collection", "variety": "Dual Logoman Autographs", "card_number": "DL-BJ", "category": "BASKETBALL_CARDS", "description": "The 2007-08 Upper Deck Exquisite Collection Dual Logoman Autographs #DL-BJ pairs Kobe Bryant and LeBron James on a singular 1/1 issue.", "grading_company": "PSA", "grade": "8.0", "cert_number": "175673254", "state": "ACTIVE", "list_price": 1772280, "alt_value": 8460808.16, "expires_at": "2026-09-25T01:00:00+00:00", "badges": ["1/1 Rare", "Ghost Card", "Pop 1"], "images": [ {"position": "FRONT", "url": "https://onlyalt-images.s3.us-east-2.amazonaws.com/image/public/front.png"}, {"position": "BACK", "url": "https://onlyalt-images.s3.us-east-2.amazonaws.com/image/public/back.png"} ] } } ```
MCPツール alt_listing
/alt/sold-listingsSearches Alt's global archive of completed card sales, aggregated across every source auction house its search carries -- the "market data" side of Alt's card-investment-marketplace positioning. This is a separate index from alt-search/alt-auctions, scoped to a rolling recent time window, not a filtered view of live listings. Pass auction_house=Alt to see only Alt's own completed auctions. Credential-free public data from Alt's own search backend. See alt-categories for the accepted category/auction_house/grading_company values.
レスポンスに関する注記
- There is no `sort` param — only Alt's own default relevance/recency ordering has been verified against this index. - `url` is the click-through link back to the original sold listing on its source site (e.g. an eBay item URL) when the source auction house provides one. - `auction_type` is a source-specific sub-classification (e.g. eBay's `BEST_OFFER`/`BUY_IT_NOW`/`AUCTION`), informational only — it is not a validated filter enum. Example response: ```json { "code": 200, "msg": "OK", "data": { "query": "michael jordan", "page": 1, "per_page": 24, "total": 101163, "results": [ { "id": "ced1abdd-989f-4cc8-b27d-2838b397d968", "asset_id": "c373aa9a-e7eb-11ea-af75-02d4568f26ba", "name": "1998 SP Top Prospects Phi Beta Jordan Phi Beta Jordan Michael Jordan #J22", "subject": "Michael Jordan", "year": 1998, "brand": "SP Top Prospects Phi Beta Jordan", "card_number": "J22", "category": "BASKETBALL_CARDS", "auction_house": "eBay", "auction_type": "BEST_OFFER", "grading_company": "PSA", "grade": "8", "pop": 16, "price": 36, "sold_date": "2026-09-15", "url": "https://www.ebay.com/itm/366655056141", "images": [ {"position": "FRONT", "url": "https://alt-images.b-cdn.net/external/ebay/sports/366655056141.jpg"} ] } ] } } ```
MCPツール alt_sold_listings
/alt/auctionsSearches Alt's own currently live auctions -- the same pool shown on alt.xyz/browse's "Auctions" tab filtered to the Alt source. Unlike alt-search, this never returns another source auction house's listings or Alt's own fixed-price items: it always uses a search key scoped server-side to Alt's own live auction pool. Credential-free public data from Alt's own search backend. See alt-categories for the accepted category/grading_company/sort values.
レスポンスに関する注記
- Every result's `auction_house` is always `Alt` and `listing_type` is always `AUCTION` — there is no `auction_house`/`listing_type` filter param here since both are already fixed. Example response: ```json { "code": 200, "msg": "OK", "data": { "query": "*", "page": 1, "per_page": 24, "total": 653, "results": [ { "id": "58e5a6a5-a7ad-417f-8cda-ceffb226928c", "name": "2007 Exquisite Collection Dual Logoman Autographs Kobe Bryant/Lebron James #DL-BJ /1", "subject": "Kobe Bryant/Lebron James", "year": 2007, "category": "BASKETBALL_CARDS", "auction_house": "Alt", "listing_type": "AUCTION", "grading_company": "PSA", "grade": "8.0", "price": 1772280, "alt_value": 8460808.16, "bid_count": 18, "watch_count": 849, "expires_at": "2026-09-25T01:00:00+00:00", "images": [ {"position": "FRONT", "url": "https://onlyalt-images.s3.us-east-2.amazonaws.com/image/public/front.png"} ] } ] } } ```
MCPツール alt_auctions
/alt/card-searchSearches Alt's reference card-design catalog -- a canonical catalog of card designs (one entry per year/brand/subject/card-number/variety combination), separate from live listings or sales. Useful for finding a card design's asset_id (to feed into alt-asset for a population report and recent sales) without already having a live listing or sale that references it. Credential-free public data from Alt's own search backend.
レスポンスに関する注記
- There is no `category` filter — Alt's own reference-catalog index does not expose `category` as a facet-able field, so this package cannot live-verify a category value against it. `category` is still returned per result, informationally. - `category` values here are not limited to `alt-categories`' sports-card list — the catalog also includes non-sport card designs (e.g. `NON-SPORT_CARDS`). Example response: ```json { "code": 200, "msg": "OK", "data": { "query": "michael jordan", "page": 1, "per_page": 24, "total": 18147, "results": [ { "asset_id": "6059088b-7daa-408c-923d-fdf1a9d94cbe", "name": "1993 High School Heroes II Michael Jordan #12", "subject": "Michael Jordan", "year": 1993, "brand": "High School Heroes II", "card_number": "12", "category": "NON-SPORT_CARDS", "pop": 16, "external_transaction_count": 12 } ] } } ```
MCPツール alt_card_search
/alt/assetReturns one card design's identity, full population report (across every grading company and grade Alt tracks), and a recent raw sales feed -- the "is this card actually rare, and what does it sell for" data for a specific card design, independent of any single listing. asset_id comes from a prior alt-search/alt-sold-listings/alt-card-search result's asset_id field. recent_sales has no per-transaction grade breakdown -- Alt's own API does not expose one; see alt-sold-listings for per-grade sold prices on specific listings. Credential-free public data from Alt's own GraphQL API.
レスポンスに関する注記
- `population[]` covers every grading company and grade Alt tracks population data for, not just the grade of any one listing. - `recent_sales[]` has no per-transaction grade breakdown — Alt's own API does not expose one, so this is a raw sales feed for the card design as a whole. See `alt-sold-listings` for per-grade sold prices on specific listings. - An `asset_id` Alt cannot resolve returns `404`. Example response: ```json { "code": 200, "msg": "OK", "data": { "asset_id": "c3156728-e7eb-11ea-a6f0-02d4568f26ba", "name": "1986 Fleer Michael Jordan #57", "subject": "Michael Jordan", "year": 1986, "brand": "Fleer", "card_number": "57", "category": "BASKETBALL_CARDS", "population": [ {"grading_company": "PSA", "grade": "8.0", "population": 9424}, {"grading_company": "BGS", "grade": "9.0", "population": 1948}, {"grading_company": "CGC", "grade": "9.5", "population": 2} ], "recent_sales": [ {"date": "2026-09-15", "price": 8800.0}, {"date": "2026-09-14", "price": 18500.0} ] } } ```
MCPツール alt_asset
/alt/market-trendsReturns Alt's own category-level price-trend index -- the same data alt.xyz's "Market Trends" page shows: a weekly/monthly/90-day change and a current index value per card category, built from Alt's own sold/valuation data. Credential-free public data from Alt's own GraphQL API.
レスポンスに関する注記
- `updated_at`/`version` reflect Alt's own update schedule for this index, not a per-request timestamp. - An unrecognized `category` value returns a typed invalid-param error listing the categories actually present in the current live response. Example response: ```json { "code": 200, "msg": "OK", "data": { "updated_at": "2026-09-16T00:00:00+00:00", "version": 42, "categories": [ { "category": "BASKETBALL_CARDS", "start_date": "2026-06-07", "end_date": "2026-09-07", "current_index_value": 10208.990057733714, "weekly_change": 0.015332941318226823, "weekly_index_change": 154.16996642535923, "monthly_change": 0.0804380022254576, "ninety_day_change": 0.19604146883360918, "ninety_day_index_change": 1673.3411494315496 } ] } } ```
MCPツール alt_market_trends
/alt/top-moversReturns Alt's biggest price-index movers -- either a cross-subject leaderboard (optionally scoped to one category) or, when subject is set, that one player/character's own trend broken out per category it appears in. category is not strictly validated against alt-categories' list -- this trend index's own category set is broader (e.g. it includes MULTI-SPORT_CARDS). Credential-free public data from Alt's own GraphQL API.
レスポンスに関する注記
- `category` here is **not** the same closed enum as `alt-categories`' — this trend index's own category set is broader (e.g. it includes `MULTI-SPORT_CARDS`, which never appears in live-listing search results), so this endpoint does not validate `category` against `alt-categories`' list. - With `subject` set, results can span multiple categories for the same player (e.g. Michael Jordan has separate basketball and baseball card trend entries). Example response (leaderboard): ```json { "code": 200, "msg": "OK", "data": { "updated_at": "2026-09-09T15:01:57.741946+00:00", "version": "ff9b83e6-672b-4a98-8346-f16c85a6f210", "subjects": [ { "subject": "Allen Iverson", "category": "BASKETBALL_CARDS", "start_date": "2025-09-07", "end_date": "2026-09-07", "current_index_value": 19234.54015194957, "weekly_change": 0.09850479760332465, "monthly_change": 0.34467981882250376, "ninety_day_change": 0.5404539004760289 } ] } } ```
MCPツール alt_top_movers
/alt/categoriesReturns every accepted value for alt-search/alt-auctions/alt-sold-listings' category, auction_house, grading_company, and listing_type params, plus the sort enum. category/auction_house/grading_company/listing_type are read live from Alt's own current search index via a facets-only query on every call, not a fixed taxonomy -- so this endpoint self-corrects if Alt's aggregator adds a new source auction house, grading company, or category. Credential-free public data from Alt's own search backend.
MCPツール alt_categories
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Altのスクレイピング方法
Alt's own data layer separates live listings, completed sales, and reference card-design data into distinct indexes. Crawlora's Alt endpoints return each one as normalized JSON -- no account.
Call /alt/categories for every accepted category, auction house, grading company, and listing type value, plus the sort enum.
Send a query to /alt/search for Alt's aggregated listings across every source auction house it carries, or to /alt/auctions to scope results to Alt's own live 24/7 auctions only.
Send a query to /alt/sold-listings for Alt's global archive of completed card sales, aggregated across every source auction house.
Pass an id and listing_type from a search result to /alt/listing for full public detail, or an asset_id (found via /alt/card-search) to /alt/asset for a card design's full population report and recent sales feed.
Call /alt/market-trends for Alt's category-level price-trend index, or /alt/top-movers for its biggest price-index movers, cross-subject or scoped to one player/character.
FAQ
Call /alt/categories for search enum values, send a query to /alt/search or /alt/sold-listings, then pass a result's id and listing_type to /alt/listing for full detail -- all as structured JSON, no account.
Yes -- /alt/search aggregates live and fixed-price listings from Alt itself plus eBay, Fanatics Collect, Pristine Auction, Goldin, CardHobby, and Memory Lane; /alt/auctions scopes results to Alt's own live auctions only.
Yes -- find its asset_id with /alt/card-search, then pass it to /alt/asset for its full population report across every grading company Alt tracks, plus a recent raw sales feed.
Yes -- /alt/market-trends returns a weekly/monthly/90-day change and current index value per card category, and /alt/top-movers returns the biggest movers, either cross-subject or for one player/character.
Collecting publicly accessible listing, sales, and trend data is generally permissible if you respect Alt's terms of use, robots directives, rate limits, and applicable law.