wtf is mcp-supermercados-cl?

This project is an MCP server that lets you search products, compare prices, and build the best shopping list across Chilean supermarket chains directly from an AI assistant like Claude or ChatGPT. It covers the five biggest chains in the country: Jumbo, Santa Isabel, Unimarc, Tottus, and Lider. The README is explicit that it never runs as a hosted cloud service. It connects over a local stdio transport and runs entirely on your own machine, alongside your AI client. This is described as intentional rather than a limitation, for two reasons: several of these stores block traffic coming from cloud datacenters and only work from a normal home internet connection, and your logged in session, loyalty pricing, and shopping cart stay in your own browser instead of touching a central server, which avoids the legal risk of a service scraping other people's accounts. Each chain has different levels of support. Jumbo has the deepest integration, including search, member pricing, product detail, your frequent purchases, saved lists, and adding items to your actual cart. Santa Isabel shares much of that through the same backend. Unimarc offers search and club pricing. Tottus and Lider currently support search only. Results include normalized per unit pricing so you can compare different package sizes, plus any bundle deals like buy two for a set price. It installs with a single npx command added to your MCP client's configuration, requires Node.js 20 or newer, and can also be built from source for local development. It is released under the MIT license and reports 157 passing tests.