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Gembook — PSA Vintage Pokémon Prices & Pop

by gembook.xyz · remote · no sign-in to list tools · v0.1.0 · published by xyz.gembook

Neutral prices + PSA population for PSA-graded vintage Pokémon (WotC 1999–2003). Read-only.

Read only
CompareRegistry entry

3 tools: 3 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http gembook https://gembook.xyz/api/mcp/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

3 tools

Only reads 3Claude Code: allow
  • get_methodology_summaryReturns a short summary of Gembook's valuation + trust methodology (what counts as a verified sale, confidence tiers, published error rates).No findings

    Why it is in this group

    • The name "get_methodology_summary" says "get": a word for reading.
    Description, as the server wrote it
    Returns a short summary of Gembook's valuation + trust methodology (what counts as a verified sale, confidence tiers, published error rates). Call this when a user asks how the prices are computed or whether they can be trusted.

    Annotations the server declares

    • readOnlyHint: true
    • idempotentHint: true
    • destructiveHint: false
    • openWorldHint: false
  • lookup_card_priceGet Gembook's fair-value estimate (USD) for a PSA-graded vintage Pokémon card (WotC era, Base Set through Skyridge, 1999–2003).No findings

    Why it is in this group

    • The name "lookup_card_price" says "lookup": a word for reading.
    Description, as the server wrote it
    Get Gembook's fair-value estimate (USD) for a PSA-graded vintage Pokémon card (WotC era, Base Set through Skyridge, 1999–2003). Returns fair value, range, confidence tier, comp count, and the card page URL. Call this when a user asks what a vintage Pokémon card is worth or whether a price is fair. Scope is PSA-graded vintage Pokémon ONLY — other graders, eras, or TCGs are out of scope.

    Annotations the server declares

    • readOnlyHint: true
    • idempotentHint: true
    • destructiveHint: false
    • openWorldHint: false
  • lookup_pop_reportGet the PSA population (number of slabs graded per grade) for a vintage Pokémon card across all grades.No findings

    Why it is in this group

    • The name "lookup_pop_report" says "lookup": a word for reading.
    Description, as the server wrote it
    Get the PSA population (number of slabs graded per grade) for a vintage Pokémon card across all grades. Call this when a user asks how rare a PSA grade is for a card. Scope: PSA-graded vintage Pokémon (Base Set through Skyridge).

    Annotations the server declares

    • readOnlyHint: true
    • idempotentHint: true
    • destructiveHint: false
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http gembook https://gembook.xyz/api/mcp/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__gembook__lookup_card_price",
      "mcp__gembook__lookup_pop_report",
      "mcp__gembook__get_methodology_summary"
    ],
    "ask": [],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as gembook. Review it before you use it.