NDEX Pricing — MCP connector
Swiss market prices for video games and consoles, with provenance, served to any MCP client from
https://www.nd-x.app/api/mcp. Read-only: two tools, one scope, no writes.
| Tool | What it does |
|---|
search_ndex_catalog | Find a game or console in the NDEX catalog (platform disambiguates homonyms). |
get_ndex_estimate | Swiss observed prices and external PAL references, kept separate, with sample size, freshness and confidence. |
The skill in skills/ndex-pricing/ teaches the model how to use them: identify first, never average
sources of different provenance, say when the price is unknown.
Connect
ChatGPT, claude.ai, Claude Desktop — add https://www.nd-x.app/api/mcp as a connector. The server
is its own OAuth 2.1 authorization server (PKCE S256, Client ID Metadata Documents, dynamic registration
as fallback). You sign in with your NDEX account and consent once.
In ChatGPT, a remote server is registered through developer mode (Plugins → new connection with the
URL above); ChatGPT assigns it an id starting with plugin_asdk_app_. A ChatGPT / Codex plugin then
references that registration through an .app.json file named by the apps field of
.codex-plugin/plugin.json. This repository ships the manifest and the skill; the .app.json is
produced at registration time, so it is not committed here.
Claude Code — install this plugin, or add the server directly:
claude mcp add --transport http ndex-pricing https://www.nd-x.app/api/mcp
Claude Code identifies itself with its Client ID Metadata Document and completes the OAuth flow in your
browser. No token to paste.
Codex, Cursor, VS Code, Gemini CLI, Windsurf, Zed, Warp — point the client at the same URL. Clients
that only support a static header can use a beta bearer token, handed out on request at
nd-x.app/mcp.
Layout
.claude-plugin/plugin.json — Claude Code / Cowork plugin manifest (skill + remote MCP server in .mcp.json)..codex-plugin/plugin.json — ChatGPT / Codex plugin manifest (skill; the remote server is attached through apps → .app.json once registered in ChatGPT, see above).server.json — entry for the official MCP registry, published as app.nd-x/ndex-pricing.skills/ndex-pricing/SKILL.md — the skill, in French (the model follows it in any language).
Privacy and terms
nd-x.app/privacy. The connector reads catalog and price data only; it
never touches your collection, your account, or the conversation.
Support: ndex_retro@proton.me