Store Price Tracker in Pi
Track an online store's prices. The MCP server is https://stores.openkrill.app/mcp. No key. The steps below are only for Pi. A call to check_store_prices was checked against that server on 2026-10-01.
What this server answers
Ask what an online store sells, what it charges and what changed since the last time anyone looked.
Ask "track competitor prices on allbirds.com", "what did gymshark.com change this week?", "which products on this store are sold out?" or "how has the price of this hoodie moved?".
Store Price Tracker reads the public product feed that Shopify stores publish at /products.json, the same list any visitor's browser can fetch without logging in.
It reports products, prices, variants and availability, and compares each daily snapshot with the one before it: new products, removed products, price changes and stock changes, per variant.
A store you ask about is added to a daily snapshot list, so its price history grows over time and can be read back for any product.
It checks the store's robots.txt first, identifies itself with a clear User-Agent, pauses between requests and backs off when a store asks for fewer.
Stores that are not on Shopify, or that keep their feed private, are reported as unavailable.
It stores only public product data (titles, prices, variants, availability) and the store's address.
Nothing about you is kept: no prompts, no account and no IP address, only a daily count of calls per tool.
What it can do
- Lists the products, prices, variants and availability of a Shopify store
- Shows new products, removed products, price changes and stock changes since the previous daily snapshot
- Keeps a daily snapshot of every store it is asked about, so price history builds up
- Reads the price and availability history of one product
- Compares up to five stores in one answer
Tools
check_store_prices, Check a store's products and price changes. Read an online store's products, prices and availability, and what changed since its previous daily snapshot. Use it for questions like "track competitor prices on allbirds.com", "what did gymshark.com change?", "did this store drop prices?", "what is new or sold out at this store?". Pass store web addresses, up to 5. Works for stores on Shopify that publish their public product feed (/products.json). The store is added to a daily snapshot list, so its history builds up. Optional filters: query (text in a product's title, brand or type), limit. Returns per store the snapshot date, product count, currency, counts and lists of new products, removed products, price changes and availability changes per variant, and matching products with price, variants and availability. The first snapshot of a store has no changes to compare with.get_product_price_history, Get a product's price history. Read how one product's price and availability moved over the days a store has been tracked. Use it for questions like "how has the price of this hoodie changed?", "when did this product go on sale?", "has this been out of stock?". Pass the store's web address and the product's link, handle or title (or part of it). Returns per variant the price, the compare-at (was) price and availability on each day something changed, from the first snapshot to now. History starts when the store was first tracked; a store never asked about before has a single snapshot. Several matching products come back as a list of titles to choose from.
Add Store Price Tracker in Pi
Pi does not speak MCP on its own. The pi-mcp-adapter extension (these steps match version 2.34.0) loads remote servers and keeps their schemas out of the prompt until you ask. Install it once, then restart Pi:
pi install npm:pi-mcp-adapterAdd the server to a shared MCP file. Use .mcp.json in the project if only that project needs Store Price Tracker, or ~/.config/mcp/mcp.json if you want it in every project. Pi also reads ~/.agents/mcp.json. A Pi-only override lives in ~/.pi/agent/mcp.json or .pi/mcp.json and wins over the shared file.
{
"mcpServers": {
"store-prices": {
"url": "https://stores.openkrill.app/mcp"
}
}
}The url is enough. Do not set command: that field is for a local process. No API key header. After restart, run /mcp and confirm the server is listed. The first call connects lazily. Ask: Track competitor prices on allbirds.com The adapter should offer check_store_prices, get_product_price_history.
Leave directTools off unless you want those schemas in every turn. With a handful of tools the cost is small. The default proxy is the better fit: search for the tool, then call it. /mcp disable store-prices writes a project override in .pi/mcp.json without editing the shared file. Run /reload after that change.
Pi will not find this server by scanning Cursor or Claude config unless you run /mcp setup and import it. Putting the url in .mcp.json is the direct path and the one this page tests against. The server is the same public endpoint the other clients use, with the same limits and the same privacy rules.
A call checked on 2026-10-01
allbirds.com is a public Shopify store used in the plugin's own starter prompts. The request below was posted to https://stores.openkrill.app/mcp as tools/call. HTTP 200. Source: the Store Price Tracker server, read 2026-10-01.
{
"method": "tools/call",
"params": {
"name": "check_store_prices",
"arguments": {
"stores": [
"allbirds.com"
],
"limit": 2
}
}
}- stores. 1 returned
- stores status. ok
Repeat the call yourself if you need a newer reading. Cached answers expire. A rate limit is not a result: wait and try again. Nothing in the call is a ranking, a filing, or advice.