Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@NDEX Pricing What's the current Swiss price for Pokémon Red on Game Boy?"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
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 |
| Find a game or console in the NDEX catalog (platform disambiguates homonyms). |
| 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.
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/mcpClaude 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.
Related MCP server: marketplace-mcp
.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).
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
This server cannot be deployed
Read-only PC game search, current store offers and recorded price history. No account required.
Search MCP servers, MCP clients and AI agents, and retrieve listing details. Free, read-only access.
Pay-per-call Swiss retail price intelligence (22 retailers). $0.01 USDC via x402.
Compare prices across Swiss and European shops — barcode (GTIN) lookup and daily price history.
