Store Price Tracker in Claude
Track an online store's prices. The MCP server is https://stores.openkrill.app/mcp. No key. The steps below are only for Claude. 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 Claude
Claude connects to a remote MCP server as a custom connector. The connection is made from Anthropic's cloud, not from your laptop, so the server must be on the public internet. Store Price Tracker is. These steps were checked against Claude's custom-connector article (updated 2026-08-11) and the Claude Code MCP docs on 2026-10-01.
On a Pro or Max plan:
- Open Customize, then Connectors.
- Select the plus button, then Add custom connector.
- Paste
https://stores.openkrill.app/mcp. Leave Advanced settings empty: this server does not need an OAuth client id or secret. - Select Add. The connector is yours. Anthropic has not reviewed it, and it is not a Directory listing.
- In a conversation, open the plus button, then Connectors, and enable Store Price Tracker. Ask: Track competitor prices on allbirds.com
On Team and Enterprise, an Owner adds the connector first at Organization settings, then Connectors, then Add, then Custom, then Web, and pastes the same URL. Members then connect it from Customize. A Free plan can add one custom connector.
In Claude Code, add it from the project directory:
claude mcp add --transport http store-prices https://stores.openkrill.app/mcpThat writes a local or user config. A JSON entry needs "type": "http" (or streamable-http) plus the url. An entry with a url and no type is skipped. Confirm with claude mcp get store-prices. The tools you should see are check_store_prices, get_product_price_history.
Enable the connector only in conversations that need it. Claude can call the tools while you work, including during research, so turn off any tool you do not want invoked. Store Price Tracker does not write to your accounts. It still receives the arguments of each call. Read the privacy page before you paste anything that is not public.
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.