Supplementscanner

What Supplementscanner MCP server does

Supplementscanner MCP server provides a read-only view of supplement prices collected from web stores in the Netherlands and Belgium. It normalizes products within their category so assistants can compare prices by kilogram for powders, or by serving or capsule for other products. The service returns prices in euros and identifies the selected market with nl for the Netherlands or be for Belgium.

The hosted service is free and does not require an API key, account, or sign-up. It is useful for questions such as finding the least expensive whey isolate per kilogram, comparing vitamin D3 capsules by capsule price, or checking whether a product’s price has changed recently.

How it works

The service is exposed through a streamable HTTP MCP endpoint. The shared endpoint is https://mcp.supplementscanner.eu; country-specific endpoints are also available at https://mcp.supplementscanner.nl and https://mcp.supplementscanner.be. The shared endpoint defaults to the Netherlands unless a request supplies market: "be".

Prices are refreshed continuously, with frequently viewed products checked more often. Every response includes last_scraped_at, allowing an assistant to report when the underlying data was last scanned. Values are returned as integer cents alongside a market-formatted price string. Products without a readable pack size do not receive an inferred unit price.

Buy links are affiliate links, and responses containing prices include an affiliate_disclosure value. Affiliate commissions do not affect the ordering of results.

Setup and configuration

For clients that support remote MCP connections, add the hosted endpoint directly and do not configure authentication. The README provides connection examples for Claude, Claude Code, ChatGPT developer mode, Cursor, VS Code, Windsurf, Cline, Gemini CLI, and Codex CLI.

Clients that only launch local commands can use the supplementscanner-mcp npm package as a stdio bridge. The bridge requires Node.js 18 or later, forwards messages to the hosted service, and contains no comparison logic. It uses the European endpoint by default. Pass be as an argument or set SUPPLEMENTSCANNER_MARKET to select the Belgian market.

Tools and capabilities

Supplementscanner MCP server exposes four read-only tools:

• find_cheapest searches a category and its subcategories, ordering products by lowest unit price. It supports market selection, result limits, and in-stock filtering.
• list_categories returns the category tree with live product counts, store counts, and the lowest unit price. Use it to obtain a category_slug.
• search_products performs typo-tolerant searches by product name or brand. It supports category, maximum unit price, stock, market, and result-limit filters.
• get_product returns one product’s price, unit price, pack size, bulk discount tiers, purchase link, and recent price history.

The catalogue covers stores in the Netherlands and Belgium. A JSON API is also available separately at https://api.supplementscanner.eu/v1, with an OpenAPI document at its corresponding /openapi.json path.

Limitations and notes

The service covers only the Netherlands and Belgium, and the returned prices are in euros. Store coverage changes over time; list_categories reports the current store count for each category. Results represent scanned web-store data rather than guaranteed checkout prices, so consumers should use the supplied timestamp and purchase link when verifying a decision.

The repository’s code and documentation use the MIT license, but the hosted price data is not covered by that license.