# Store Price Tracker

Watch a Shopify store's prices and see what changed. It is free, with no sign-up and no key.

## What it does

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.

When comparing stores across borders quoting in different currencies, it normalizes prices using daily foreign exchange reference rates of the European Central Bank (ECB, https://www.ecb.europa.eu), read through the keyless Frankfurter API (https://frankfurter.dev; URL: https://api.frankfurter.dev/v2/providers/ecb/rates; checked 2026-10-02). Data is reused under the ECB Conditions for Reuse of Public Sector Information with attribution.

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.

- 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
- Compares store catalogs for price gaps, currency differences, and landed margins

## Who it is for

Anyone who asks an AI assistant a question like this one: “What did this store change this week?”

Roles that use it at work: Shopify operator, Founder.

Role guides that use it: [Shopify operator](https://tools.openkrill.app/for/shopify-operator).

## Price

Store Price Tracker is free to use. There is no sign-up, no account and no API key. Calls are limited to 60 calls a minute per network and 5000 calls a day per server, shared by all callers. Repeat questions are answered from a cache.

## Tools it offers

- `check_store_prices`: Check a store's products and price changes
- `get_product_price_history`: Get a product's price history
- `compare_store_prices`: Compare prices and find gaps across stores

## Connect

The MCP server is `https://stores.openkrill.app/mcp` (streamable HTTP). It needs no key.

Claude Code, in one command:

```
claude mcp add --transport http store-prices https://stores.openkrill.app/mcp
```

Hermes Agent, in one command that answers its two setup questions (no key, enable all tools):

```
printf 'n\ny\n' | hermes mcp add store-prices --url https://stores.openkrill.app/mcp
```

Or add these lines to `~/.hermes/config.yaml`, under an existing `mcp_servers:` key if the file has one. Start a new Hermes session after either step.

```
mcp_servers:
  store-prices:
    url: https://stores.openkrill.app/mcp
```

Any other agent: give it this page's Markdown address, `https://tools.openkrill.app/tools/store-prices.md`, and ask it to connect Store Price Tracker.

Install guides, each checked with a real call: [Store Price Tracker in ChatGPT](https://tools.openkrill.app/integrations/store-prices/chatgpt), [Store Price Tracker in Claude](https://tools.openkrill.app/integrations/store-prices/claude), [Store Price Tracker in Cursor](https://tools.openkrill.app/integrations/store-prices/cursor), [Store Price Tracker in VS Code](https://tools.openkrill.app/integrations/store-prices/vscode), [Store Price Tracker in Pi](https://tools.openkrill.app/integrations/store-prices/pi).

## Job recipes for agents

Step-by-step recipes that walk an agent through 3 jobs with this server's tools:

- Check a store's products and price changes, with `check_store_prices`
- Compare prices and find gaps across stores, with `compare_store_prices`
- Get a product's price history, with `get_product_price_history`

[Download the recipes as SKILL.md](https://tools.openkrill.app/skills/store-prices-jobs/SKILL.md). Save it as `store-prices-jobs/SKILL.md` in your agent's skills folder. A connected MCP client gets the same recipes from `prompts/list` on the gateway, `https://api.openkrill.app/gateway/mcp`.

It is listed under Shops and sellers in the [full tool list](https://tools.openkrill.app/tools). The same facts in plain text are in [llms.txt](https://tools.openkrill.app/llms.txt).

Source: the Store Price Tracker listing, version 1.0.1. As of 2026-10-18.