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MyCardfolio MCP server

Which MCP servers are MyCardfolio's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-21

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Whose server it is
  • Registry namecom.mycardfolio/cardsverified in the MCP registry

The registry name sits under mycardfolio.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-21
  • Stateanswerschecked 2026-10-21
  • Tools7
  • Server calls itselfmycardfolio
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-21 the server answered initialize and tools/list without a sign-in. First answer in 255 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 13, the first on 2026-10-21
  • INITE MCP score95 of 100answers 100 · definitions 83 · context 100 · connects 100
  • Answered100% of days13 of 13 daily checks
  • Median first answer276 ms
  • Space in an agent's context≈ 731 tokensthe definitions of all its tools (7), which an agent carries on every turn
  • Tool definitionsB · 83 of 100
  • Typed results0 of 7 toolsdeclared outputSchema: results come typed, read once
  • Not saying whether it only reads or can destroy: 7 of 7

What an agent can do with it

  • not sure · Search sports cards by player, set and year
  • not sure · Browse card listings by sport, such as baseball or hockey
  • not sure · Look up individual cards in a specific set

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers7 tools · read 2026-10-21
  • search_cards

    Full-text search over the MyCardfolio sports card database. Searches player/subject names, card numbers, products, sets, and card details. Optionally filter by sport and year.

  • get_card

    Full detail for a single card by its card_id, plus a few related cards from the same set.

  • get_set_checklist

    Complete checklist of cards in a set by set_id, with set metadata. Output is capped at 500 cards.

  • browse

    Navigate the database hierarchy: no arguments lists sports with card counts; sport lists years; sport + year lists products; product_id lists sets.

  • find_variants

    Find parallels/variants of a card: cards sharing the same year, product, card number, and subjects but belonging to a different set (e.g. base vs. refractor).

  • identify_card

    Parse a free-text card description or eBay-style listing title (e.g. "1989 Upper Deck Ken Griffey Jr #1 PSA 10") and return the best database matches with a confidence note.

  • card_of_the_day

    MyCardfolio's featured card of the day (changes daily).

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "cards": {
      "type": "http",
      "url": "https://mycardfolio.com/api/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http mycardfolio https://mycardfolio.com/api/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://mycardfolio.com/api/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.