Gembook — PSA Vintage Pokémon Prices & Pop

xyz.gembook/gembook · v0.1.0

No registry update 90+ days

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2025-06-18
Rank score	—
Declared risk	Read-only (all tools declare readOnlyHint)
Capabilities declared	tools
Tool definitions	3 tools · with description 100% · input schema is an object 100% · read/destructive hints 100%

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

streamable-http · https://gembook.xyz/api/mcp/mcp

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

{
  "mcpServers": {
    "gembook": {
      "url": "https://gembook.xyz/api/mcp/mcp"
    }
  }
}

lookup_card_price
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. S
lookup_pop_report
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).
get_methodology_summary
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.

Website · JSON · Text for agents · Registry updated 2026-06-11