Underpriced AI
Check what secondhand items sell for on eBay and get a worth-it verdict before you buy or list.
Looks up real eBay sold listings to estimate resale value for secondhand items. Shows price ranges, recent comps, list prices with sell probability, net after fees, and whether a purchase or sale makes sense. Can draft eBay listings from photos.
Try asking Muse: "I found a used camera at a thrift store for $40, is it worth buying to resell on eBay?"
Source: Found in the official MCP Registry (com.underpricedai/underpriced-ai) · First listed September 24, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 1 h ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
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How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://underpricedai.com/api/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 909ms. Worked in 97.4% of checks over 30 days.
Screening · September 24, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 6
price_itemWhat a secondhand item sells for on eBay US: a calibrated estimate with a range, the recent real sold comps behind it, three list prices (fast, market, patient) with the 14-day sell chance, the net after eBay fees, and a worth-it verdict when you pass what the user would pay. Givget_sold_compsThe most recent real eBay US sales for a search query (brand, model or pattern, a few specific words), with the count, median and quartiles. Use when the user wants to see what actually sold and for how much.worth_itNet after eBay fees and a verdict (worth it / thin / pass) for an expected sale price and what the user would pay. Pure arithmetic; use price_item first when the sale price is unknown.buy_creditsWays to pay for Underpriced AI scans. Without a choice it lists the credit packs (credits never expire), pay as you go ($0.25 per photo scan on a monthly bill, no cap), and for a signed-in user their balance. With a pack it returns a Stripe Checkout link for that user; with PAY_Aget_scan_resultFor a signed-in user: the finished result for a scan on their account, in the same shape as price_item, once the sold comps have landed in the background. Call it with the account.scanId a photo price returned when that result said comps were still loading (about 20 seconds laterlist_on_ebayFor a signed-in user: turns a photo scan from price_item (account.scanId) into an inventory item with a draft eBay listing on their Underpriced AI account (title, list price defaulting to the market price, condition, description) and returns the link where they review and publishRecent checks
Link
https://underpricedai.com/api/mcpQuestions about Underpriced AI in Muse
How do I connect Underpriced AI to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Underpriced AI to help me. It is a free service with an MCP server at https://underpricedai.com/api/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is Underpriced AI working right now?
At the last check (September 28, 2026, 08:01 UTC) the endpoint was working, answering in 909ms. Over the last 7 days it answered 97.4% of health checks. It is checked every 15 minutes.
Is Underpriced AI safe to connect to Muse?
It was screened on September 24, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can Underpriced AI do in Muse?
It exposes 6 tools, including price_item, get_sold_comps, worth_it, buy_credits. For example, you could ask Muse: "I found a used camera at a thrift store for $40, is it worth buying to resell on eBay?"
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