Know what anything is worth new, used, or resale, and get links to the best place to buy or sell it. Just name it or snap a photo.
Scored across 3 tools
compare_prices and price_item both take a single named item and return new/used/resale price data, making their boundaries blurry. The only real differentiator is that price_item also accepts a photo and returns a confidence score, which is a weak distinction for an agent choosing between them.
All three tools use snake_case verb-based names (compare_prices, price_item, where_to_buy_or_sell), which is consistent and readable. The only minor deviation is where_to_buy_or_sell being a longer phrase rather than a simple verb_noun pair.
Three tools is on the thin side for a pricing/valuation domain and leaves no room for related operations like search or history. It is not an extreme mismatch, but the surface feels minimal.
The set covers pricing, price comparison, and buy/sell links for a single item, which addresses the core 'worth' workflow. However, there is no way to search or discover items, no price history/trends, and no bulk or category-level valuation, leaving notable gaps.
New, used, and resale prices for one named item. estimate_low and estimate_high carry a range already priced, or -1 when the title still needs a price.
| Name | Required | Description | Default |
|---|---|---|---|
| grade | No | Card grade such as PSA 9. | |
| title | Yes | Item name to compare. | |
| category | No | Category hint. | |
| condition | No | Condition the user stated. | |
| estimate_low | No | Low end from price_item. -1 if you do not have one. | |
| estimate_high | No | High end from price_item. -1 if you do not have one. |
| Name | Required | Description |
|---|---|---|
| best | Yes | |
| name | Yes | |
| view | Yes | |
| comps | No | |
| links | Yes | |
| priced | Yes | |
| outcome | Yes | |
| currency | Yes | |
| headline | Yes | |
| new_from | Yes | |
| from_past | No | |
| new_label | Yes | |
| retailers | No | |
| used_from | Yes | |
| confidence | Yes | |
| resale_low | Yes | |
| used_label | Yes | |
| resale_high | Yes | |
| estimate_low | Yes | |
| resale_label | Yes | |
| estimate_high | Yes | |
| confidence_label | No |
Prices one item from a photo or a name. Returns what it is worth as a range, the new and used asking prices, resale, and a confidence.
| Name | Required | Description | Default |
|---|---|---|---|
| notes | No | Any other fact the user added. | |
| title | No | Item name, as the user said it. Empty when the photo is the only input. | |
| condition | No | Condition the user already stated. | |
| image_url | No | https URL of a photo of the item. Empty if there is no URL. | |
| media_type | No | Photo type when a photo is sent. | |
| image_base64 | No | Base64 photo bytes, without a data: prefix. Empty if there is no inline photo. |
| Name | Required | Description |
|---|---|---|
| best | Yes | |
| name | Yes | |
| view | Yes | |
| comps | No | |
| links | Yes | |
| priced | Yes | |
| outcome | Yes | |
| currency | Yes | |
| headline | Yes | |
| new_from | Yes | |
| from_past | No | |
| new_label | Yes | |
| retailers | No | |
| used_from | Yes | |
| confidence | Yes | |
| resale_low | Yes | |
| used_label | Yes | |
| resale_high | Yes | |
| estimate_low | Yes | |
| resale_label | Yes | |
| estimate_high | Yes | |
| confidence_label | No |
Marketplace links to buy one named item new, buy it used, or sell it. Each link is a Worth tracking URL.
| Name | Required | Description | Default |
|---|---|---|---|
| place | No | Kind of shop nearby, such as card shop. | |
| title | Yes | Item name. | |
| intent | No | What the user wants to do. | any |
| category | No | Category hint. |
| Name | Required | Description |
|---|---|---|
| best | Yes | |
| name | Yes | |
| view | Yes | |
| comps | No | |
| links | Yes | |
| priced | Yes | |
| outcome | Yes | |
| currency | Yes | |
| headline | Yes | |
| new_from | Yes | |
| from_past | No | |
| new_label | Yes | |
| retailers | No | |
| used_from | Yes | |
| confidence | Yes | |
| resale_low | Yes | |
| used_label | Yes | |
| resale_high | Yes | |
| estimate_low | Yes | |
| resale_label | Yes | |
| estimate_high | Yes | |
| confidence_label | No |
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
compare_prices2 fields changedOutput schema / properties / from_pastAdded value: +{
+ "type": "boolean"
+}Output schema / properties / retailersAdded value: +{
+ "type": "array"
+}price_item2 fields changedOutput schema / properties / from_pastAdded value: +{
+ "type": "boolean"
+}Output schema / properties / retailersAdded value: +{
+ "type": "array"
+}where_to_buy_or_sell2 fields changedOutput schema / properties / from_pastAdded value: +{
+ "type": "boolean"
+}Output schema / properties / retailersAdded value: +{
+ "type": "array"
+}compare_prices2 fields changedOutput schema / properties / compsAdded value: +{
+ "type": "number"
+}Output schema / properties / confidence_labelAdded value: +{
+ "type": "string"
+}price_item2 fields changedOutput schema / properties / compsAdded value: +{
+ "type": "number"
+}Output schema / properties / confidence_labelAdded value: +{
+ "type": "string"
+}where_to_buy_or_sell2 fields changedOutput schema / properties / compsAdded value: +{
+ "type": "number"
+}Output schema / properties / confidence_labelAdded value: +{
+ "type": "string"
+}compare_pricesprice_itemwhere_to_buy_or_sellFind what anything is worth: resale value, used and new prices, and where to buy or sell it.
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