Gembook — PSA Vintage Pokémon Prices & Pop
Neutral prices + PSA population for PSA-graded vintage Pokémon (WotC 1999–2003). Read-only.
Should I use this
Quality & Safety
Based on automated analysis of tool definitions and protocol compliance.
Context Cost
This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.
Install
One-Click Install
Add this to your `claude_desktop_config.json` file:
{
"mcpServers": {
"gembook": {
"url": "https://gembook.xyz/api/mcp/mcp"
}
}
}Remote endpoints
https://gembook.xyz/api/mcp/mcpstreamable-httpWhat it can do
Tool inventory
Tools (3)
🟢lookup_card_price(card_name, set_name, grade, variant)
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.
Input Schema
{
"type": "object",
"properties": {
"card_name": {
"type": "string",
"minLength": 2,
"description": "Card name, e.g. 'Charizard'"
},
"set_name": {
"description": "Set name to narrow, e.g. 'Base', 'Jungle', 'Neo Genesis'",
"type": "string"
},
"grade": {
"description": "PSA grade 1–10",
"type": "integer",
"minimum": 1,
"maximum": 10
},
"variant": {
"description": "Edition/variant to narrow, e.g. '1st Edition', 'Shadowless', 'Unlimited', 'Reverse Holo'",
"type": "string"
}
},
"required": [
"card_name"
],
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢lookup_pop_report(card_name, set_name, variant)
Get the PSA population (number of slabs graded per grade) for a vintage Pokémon card across all grades. Call this when a user asks how rare a PSA grade is for a card. Scope: PSA-graded vintage Pokémon (Base Set through Skyridge).
Input Schema
{
"type": "object",
"properties": {
"card_name": {
"type": "string",
"minLength": 2,
"description": "Card name, e.g. 'Blastoise'"
},
"set_name": {
"description": "Set name to narrow, e.g. 'Base'",
"type": "string"
},
"variant": {
"description": "Edition/variant to narrow, e.g. '1st Edition', 'Shadowless', 'Unlimited', 'Reverse Holo'",
"type": "string"
}
},
"required": [
"card_name"
],
"$schema": "http://json-schema.org/draft-07/schema#"
}🟢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.
Input Schema
{
"type": "object",
"properties": {},
"$schema": "http://json-schema.org/draft-07/schema#"
}Community
Evidence