Gembook — PSA Vintage Pokémon Prices & Pop for ChatGPT

xyz.gembook/gembook

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

client:ChatGPT transport:streamable-http tools:3

Install Gembook — PSA Vintage Pokémon Prices & Pop in ChatGPT

Settings → Connectors → Advanced → Developer mode

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

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs