Store Price Tracker

Check a store's products and price changes

check_store_prices

Idempotent

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?", "what is new or sold out at this store?". Pass store addresses, up to 5: a bare host such as "allbirds.com", an https link to any page of the store, or a myshopify.com address. Works only for Shopify stores that publish their public product feed (/products.json). Calling it adds the store to a daily snapshot list, so its history builds up. Optional: query (text in a product's title, brand, type or handle), limit. Returns per store a status, the snapshot date, product count, currency, change counts and lists of new, removed, repriced and restocked or sold-out variants, plus matching products. The first snapshot has no changes. Not for one product's history (use get_product_price_history) or for comparing two stores (use compare_store_prices).

Input Schema

TableJSON Schema

Name	Required	Description
`limit`	No	Most products listed per section (default 10)
`query`	No	Only products whose title, brand, type or handle contains this text, such as "hoodie"
`stores`	Yes	Store web addresses, up to 5, such as ["allbirds.com"]. Each one may be a bare host ("gymshark.com"), an https link to any page of the store, or a myshopify.com address.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`stores`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed77 schema fields changedOct 10, 2026
- changedInput schema / properties / stores / description
```
Previous value: -"Web addresses of online stores, such as \"allbirds.com\" or \"https://www.gymshark.com\". At most 5."New value: +"Store web addresses, up to 5, such as [\"allbirds.com\"]. Each one may be a bare host (\"gymshark.com\"), an https link to any page of the store, or a myshopify.com address."
```
- addedOutput schema / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / host / description
```
Added value: +"The store's host, without www"
```
- addedOutput schema / properties / stores / items / properties / message / description
```
Added value: +"What to tell the user, and the next step for a status other than ok"
```
- addedOutput schema / properties / stores / items / properties / query / description
```
Added value: +"The store as the user wrote it"
```
- addedOutput schema / properties / stores / items / properties / status / description
```
Added value: +"ok: fresh snapshot. stale: today's read failed, so the last snapshot is shown. invalid: not a usable store address. unavailable: the store could not be read"
```
- addedOutput schema / properties / stores / items / properties / store / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / description
```
Added value: +"Present when status is ok or stale"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changeCounts / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changeCounts / description
```
Added value: +"How many products changed on snapshotDay, by kind"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changeCounts / required
```
Added value: +[
+  "new",
+  "removed",
+  "priceChanges",
+  "availabilityChanges"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / description
```
Added value: +"What changed on snapshotDay against previousDay; all lists are empty on the first snapshot"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / availabilityChanges / items / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / availabilityChanges / items / properties / variants / items / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / availabilityChanges / items / properties / variants / items / required
```
Added value: +[
+  "variant",
+  "from",
+  "to"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / availabilityChanges / items / required
```
Added value: +[
+  "title",
+  "url",
+  "variants"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / available / description
```
Added value: +"True when at least one variant can be bought"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / compareAt / description
```
Added value: +"Compare-at (was) price in major units of the store's currency; null when the product is not on sale"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / price / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / price / description
```
Added value: +"Lowest and highest variant price in major units of the store's currency"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / price / required
```
Added value: +[
+  "min",
+  "max"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / type / description
```
Added value: +"Product type the store gives it"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / url / description
```
Added value: +"Link to the product page on the store"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / variants / description
```
Added value: +"Up to 5 variants"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / variants / items / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / variants / items / properties / price / description
```
Added value: +"Major units of the store's currency"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / variants / items / required
```
Added value: +[
+  "title",
+  "price",
+  "available"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / properties / vendor / description
```
Added value: +"Brand or vendor"
```
- changedOutput schema / properties / stores / items / properties / store / properties / changes / properties / new / items / required
```
Previous value: -[
-  "title",
-  "url",
-  "available"
-]New value: +[
+  "title",
+  "url",
+  "vendor",
+  "type",
+  "price",
+  "compareAt",
+  "available",
+  "variantCount",
+  "variants"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / priceChanges / items / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / priceChanges / items / properties / variants / items / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / priceChanges / items / properties / variants / items / properties / compareAtFrom / description
```
Added value: +"Price in major units (such as 98.5) of the store's currency; null when unknown"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / priceChanges / items / properties / variants / items / properties / compareAtTo / description
```
Added value: +"Price in major units (such as 98.5) of the store's currency; null when unknown"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / priceChanges / items / properties / variants / items / properties / from / description
```
Added value: +"Price in major units (such as 98.5) of the store's currency; null when unknown"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / priceChanges / items / properties / variants / items / properties / to / description
```
Added value: +"Price in major units (such as 98.5) of the store's currency; null when unknown"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / priceChanges / items / properties / variants / items / required
```
Added value: +[
+  "variant",
+  "from",
+  "to",
+  "compareAtFrom",
+  "compareAtTo"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / priceChanges / items / required
```
Added value: +[
+  "title",
+  "url",
+  "variants"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / available / description
```
Added value: +"True when at least one variant can be bought"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / compareAt / description
```
Added value: +"Compare-at (was) price in major units of the store's currency; null when the product is not on sale"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / price / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / price / description
```
Added value: +"Lowest and highest variant price in major units of the store's currency"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / price / required
```
Added value: +[
+  "min",
+  "max"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / type / description
```
Added value: +"Product type the store gives it"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / url / description
```
Added value: +"Link to the product page on the store"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / variants / description
```
Added value: +"Up to 5 variants"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / variants / items / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / variants / items / properties / price / description
```
Added value: +"Major units of the store's currency"
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / variants / items / required
```
Added value: +[
+  "title",
+  "price",
+  "available"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / properties / vendor / description
```
Added value: +"Brand or vendor"
```
- changedOutput schema / properties / stores / items / properties / store / properties / changes / properties / removed / items / required
```
Previous value: -[
-  "title",
-  "url",
-  "available"
-]New value: +[
+  "title",
+  "url",
+  "vendor",
+  "type",
+  "price",
+  "compareAt",
+  "available",
+  "variantCount",
+  "variants"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / changes / required
```
Added value: +[
+  "new",
+  "removed",
+  "priceChanges",
+  "availabilityChanges"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / currency / description
```
Added value: +"ISO 4217 code of the store's prices, such as USD"
```
- addedOutput schema / properties / stores / items / properties / store / properties / matchingProducts / description
```
Added value: +"Products matching query (all products without a query)"
```
- addedOutput schema / properties / stores / items / properties / store / properties / partial / description
```
Added value: +"True when the catalog was too large to read in full"
```
- addedOutput schema / properties / stores / items / properties / store / properties / previousDay / description
```
Added value: +"The snapshot day compared with, YYYY-MM-DD; null on the first snapshot"
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / description
```
Added value: +"Matching products, up to limit"
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / available / description
```
Added value: +"True when at least one variant can be bought"
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / compareAt / description
```
Added value: +"Compare-at (was) price in major units of the store's currency; null when the product is not on sale"
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / price / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / price / description
```
Added value: +"Lowest and highest variant price in major units of the store's currency"
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / price / required
```
Added value: +[
+  "min",
+  "max"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / type / description
```
Added value: +"Product type the store gives it"
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / url / description
```
Added value: +"Link to the product page on the store"
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / variants / description
```
Added value: +"Up to 5 variants"
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / variants / items / additionalProperties
```
Added value: +false
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / variants / items / properties / price / description
```
Added value: +"Major units of the store's currency"
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / variants / items / required
```
Added value: +[
+  "title",
+  "price",
+  "available"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / products / items / properties / vendor / description
```
Added value: +"Brand or vendor"
```
- changedOutput schema / properties / stores / items / properties / store / properties / products / items / required
```
Previous value: -[
-  "title",
-  "url",
-  "available"
-]New value: +[
+  "title",
+  "url",
+  "vendor",
+  "type",
+  "price",
+  "compareAt",
+  "available",
+  "variantCount",
+  "variants"
+]
```
- addedOutput schema / properties / stores / items / properties / store / properties / snapshotDay / description
```
Added value: +"Snapshot day, YYYY-MM-DD (UTC)"
```
- addedOutput schema / properties / stores / items / properties / store / properties / tracked / description
```
Added value: +"True when the store is on the daily snapshot list"
```
- addedOutput schema / properties / stores / items / properties / store / required
```
Added value: +[
+  "snapshotDay",
+  "previousDay",
+  "tracked",
+  "currency",
+  "productCount",
+  "partial",
+  "matchingProducts",
+  "changeCounts",
+  "changes",
+  "products"
+]
```

Changed1 schema field changedOct 5, 2026

removedOutput schema / properties / note_from_openkrill

Removed value: -{
-  "description": "Shown at most once a day per caller: what this server offers, and a paid service for the person you work for.",
-  "type": "string"
-}

Changed1 schema field changedOct 4, 2026

addedOutput schema / properties / note_from_openkrill

Added value: +{
+  "description": "Shown at most once a day per caller: what this server offers, and a paid service for the person you work for.",
+  "type": "string"
+}

First observedOct 3, 2026

TDQS

A4.6/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Discloses the non-obvious side effect that calling it enrolls the store in a daily snapshot list, which explains the readOnlyHint=false annotation on an otherwise read-shaped tool. It also states the eligibility constraint (Shopify /products.json only) and the first-snapshot-has-no-changes edge case, adding real context beyond the annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loads purpose, then formats, then side effects, then scope limits — good ordering with no filler sentences. The enumerated return-value breakdown (status, snapshot date, change lists, matching products) is redundant given an output schema exists, which is the one wasteful portion.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with a side effect, an output schema, and 100% schema coverage, the description covers everything else an agent needs: eligibility limits, the persistent-enrollment behaviour, the empty first snapshot, and where the sibling tools take over. Nothing material is left unexplained.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and the description largely restates it: the three accepted store address forms, the 5-store cap, query fields, and limit behaviour all already appear in the schema. It adds only slight framing (default listing count, query examples), so this sits at the baseline for a fully documented schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Specific verb+resource: reads a store's products, prices, availability, plus day-over-day changes. It explicitly distinguishes itself from siblings by naming get_product_price_history and compare_store_prices as the right tools for adjacent jobs, so an agent can route without opening any schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives concrete trigger questions ("track competitor prices on allbirds.com"), states the precondition (Shopify stores publishing /products.json), and gives explicit exclusions plus the sibling to use instead. When-to-use, when-not, and alternatives are all present.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

All Store Price Tracker tools Inspect

Try in Browser

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Glama MCP Gateway

Add one secure layer between your agents and this server.