For AI assistants
Price anything from inside Claude, ChatGPT or your coding assistant
One URL turns your assistant into a reseller pricing tool that answers from real eBay sold listings. No account needed for a few calls a day.
You, in a chat
Ask in plain words, or paste a photo link.
- Claude
- ChatGPT
- Claude Code
- Cursor
Underpriced AI connector
Identifies the item, reads the sales, prices it, and can draft the eBay listing.
- price_item
- get_sold_comps
- worth_it
- list_on_ebay
Real sold listings
Recent eBay sales, an automatic backup source, and our own archive of more than a million sales.
The question leaves the chat, the answer comes back into it, with the sales behind the number.
What would a Pyrex Butterfly Gold 443 mixing bowl sell for on eBay? Use the Underpriced AI connector.
A Pyrex Butterfly Gold 443 mixing bowl in good condition sells for about $19.60 on eBay, with sales landing between $7 and $38. That is the weighted median of 134 real sold listings.
- Sells fast
- $17
- Market
- $20
- Patient
- $23
Recent sales: a 442 Cinderella bowl at $22 on Sep 12, a 404 four-quart bowl at $90 on Sep 12. After eBay fees you clear about $16.70. Tell me what you would pay and I will say whether it is worth it.
Server URL
https://underpricedai.com/api/mcp
Claude adds it from its directory in one tap. Cursor and VS Code install in one click. ChatGPT takes the URL once in its connector settings.
Connect it
- Tap Add to Claude above. It opens our listing in the Claude directory; choose Add there.
- Without the directory: Settings, then Connectors, then Add custom connector, name it Underpriced AI and paste the server URL. Leave authentication empty.
- Claude offers the sign-in the first time you use it.
On Team and Enterprise an owner adds it for the organization from the same listing.
Prompts to try
Each opens a new chat with the prompt typed. Add the connector first, once.
What would a Pyrex Butterfly Gold 443 mixing bowl sell for on eBay? Use the Underpriced AI connector.
Here is a photo link of a lamp I found for $12. Is it worth buying? Use the Underpriced AI connector, signed in to my account: [paste photo link]
Show me recent sold prices for a Leica M4-P body from the Underpriced AI connector.
If it sells for $45 and I pay $8, what do I clear after eBay fees? Use the Underpriced AI connector.
Price this photo on my Underpriced AI account and get the eBay listing ready: [paste photo link]
What your assistant can do
price_item
What it sells for, from a description, or from a photo link once you sign in, with the recent sales behind it.
get_sold_comps
The most recent real eBay US sales for a search (sold comps).
worth_it
What you keep after eBay fees and a plain verdict: worth it, thin, or pass.
get_scan_result
The finished recent sales and final number for a saved photo scan.
list_on_ebay
Prepares the eBay draft for an item you priced. You review and publish in the app.
buy_credits
The credit packs, your balance and a checkout link.
Full tool reference
- price_item
- What it sells for, from a description, or from a photo link once you sign in, with the recent sales behind it. You get a calibrated estimate with a range, the recent eBay sales behind it, and three list prices with the two-week sell chance. Add what you would pay and you get what you keep after eBay fees and a worth-it verdict. A photo price runs a real scan on your account, in your own eBay marketplace and currency.
- get_sold_comps
- The most recent real eBay US sales for a search (sold comps). Count, median and quartiles. Best Offer sales are shown at eBay's asking price and counted at a typical offer discount.
- worth_it
- What you keep after eBay fees and a plain verdict: worth it, thin, or pass. Give it an expected sale price and a cost.
- get_scan_result
- The finished recent sales and final number for a saved photo scan. Signed in, a photo price answers as soon as the estimate is ready; this fetches the rest a few seconds later.
- list_on_ebay
- Prepares the eBay draft for an item you priced. You review and publish in the app. Title, list price, condition and description on your own account. The draft waits on the Sell tab under Not live yet. Nothing is ever published by the assistant; you check the listing and tap Publish to eBay yourself. It prepares eBay only: for Poshmark, Mercari or Facebook the app's desktop Chrome extension fills the form, or on a phone the app copies each field for you to paste, and you post it.
- buy_credits
- The credit packs, your balance and a checkout link. Once you are signed in. The 5, 15 and 30 scan packs ($3, $7, $12) can be bought from the chat; bigger packs and plans are on the pricing page.
Without signing in
Ten text prices and forty recent-sales lookups a day per caller, with a daily ceiling for everyone. USD, eBay US. Pricing from a photo needs you signed in.
Signed in
A photo price is a real scan on your account: it uses your plan scans (carried-over ones first) or credits, lands in your history, and the assistant can prepare the eBay draft for you. Out of scans? It can buy a pack, from $3 for 5 scans, and the credits never expire, or turn on pay per answer: 25¢ for each photo pricing, billed monthly, no plan needed. On a plan, the same switch is the top-up past your plan's scans.