MCP server

Gembook — PSA Vintage Pokémon Prices & Pop Official

xyz.gembook/gembook

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Working at last checkVerified publisher: gembook.xyzAbout 585 tokens per request once connected3 tools

https://gembook.xyz/api/mcp/mcp

At a glance

Type: MCP server
Publisher: gembook.xyz (verified by the MCP Registry)
Status: Working at last check
Tools: 3
Token cost: About 585 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.gembook]
url = "https://gembook.xyz/api/mcp/mcp"

Gemini CLI

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

Cursor

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

VS Code

{"servers":{"gembook":{"type":"http","url":"https://gembook.xyz/api/mcp/mcp"}}}

Antigravity

agy mcp add gembook https://gembook.xyz/api/mcp/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"gembook","server_url":"https://gembook.xyz/api/mcp/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"gembook","server_url":"https://gembook.xyz/api/mcp/mcp"}

get_methodology_summary ~109 tokens
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.
lookup_card_price ~276 tokens
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 ~200 tokens
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).

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