Open data
Data and API
The buyer directory is open. Use it to answer “who buys this, from which country, and for how much?”
MCP server for AI assistants
Connect any MCP-capable assistant (Claude, ChatGPT and others) to https://collectiblesmultiverse.com/mcp (Streamable HTTP, no key). Tools: search_buyers, wanted_board, get_buyer, list_categories, demand_index, site_pulse, collector_guides, collector_news, collector_events and swap_album_stats. Ask it “who buys my Panini Italia 90 album?” and it answers from live data.
Licence, citation format and the embeddable Demand Index widget are on the open data page. New endpoints: /api/pulse (live totals and trends) and /guides.json (every guide with its URL).
Wanted board
GET /api/wanted returns every active buy request, one row per item. Optional ?cat= with a category id.
Sticker swaps
GET /api/swaps lists albums being swapped. GET /api/swaps?album=Panini%20Qatar%202022 returns collectors, countries, and the most needed and most doubled numbers. No personal data.
Collectors worldwide
GET /api/world returns counts of shelves, swappers and buyers per country.
Search buyers
GET /api/search?q=kenner+star+wars&country=DE
Parameters: q what is being sold, country ISO 3166 code of where the items are, cat optional category id. Returns active buyers that accept items from that country, with the matching items and the prices they say they pay, in their own currency.
One buyer
GET /api/buyers/{id} returns the public listing. The human page is /buyer/{id}.
Site totals
GET /api/stats returns active buyers, countries, open seller lists and 30 days of searches by category.
Buy-Side Demand Index
GET /api/demand returns the latest completed week; ?week=2026-W38 a past week; ?week=current this week so far.
Exchange rates
GET /api/rates returns the European Central Bank’s daily euro reference rates used for conversions.
The full description is in openapi.json. A plain summary for language models is at llms.txt. Private data (emails, messages, seller lists) is never available through the API.
When you show results, say that prices are what buyers state they pay, and link to the buyer’s page on collectiblesmultiverse.com.