About Worth
Worth is an MCP service for estimating the value of items such as collectibles, electronics, and vintage goods. It compares new, used, and resale prices, gives a confidence score, and links to places to buy or sell; prices are estimates based on live listings.
Key features
- 01Estimate value from a name or photo
- 02Compare new, used, and resale prices
- 03Show estimate confidence
- 04Link to stores and marketplaces
- 05Read-only tools with interactive price cards
Use cases
- 01Pricing thrift or yard-sale finds
- 02Deciding whether to buy an item used
- 03Estimating resale value of collectibles
- 04Finding places to sell an item
MCP support
Exposes read-only pricing and marketplace tools through a no-auth Streamable HTTP MCP server. Results are displayed as interactive price cards, and lookups have a free daily allowance.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://worth.area21.io/mcp?src=mcp_registryclaude mcp add --transport http a21ai-worth https://worth.area21.io/mcp?src=mcp_registry{"mcpServers":{"a21ai-worth":{"type":"http","url":"https://worth.area21.io/mcp?src=mcp_registry"}}}Open in Cursor{"servers":{"a21ai-worth":{"type":"http","url":"https://worth.area21.io/mcp?src=mcp_registry"}}}Open in VS Code{"mcpServers":{"a21ai-worth":{"type":"http","url":"https://worth.area21.io/mcp?src=mcp_registry"}}}{"mcpServers":{"a21ai-worth":{"serverUrl":"https://worth.area21.io/mcp?src=mcp_registry"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
Details
From the project README
Worth
Never overpay, never undersell.
Ask your AI "what's it worth?" about anything (thrift finds, collectibles, electronics, vintage) and get its resale value, used price and new price, plus links to the best place to buy or sell.
What you get
- A fair price in seconds. Name it or snap a photo; get an estimate with a confidence score.
- Know if used is worth it. See new vs. used vs. resale side by side, and how much you save or can earn.
- The best place to buy or sell. Direct links to stores and marketplaces, matched to what you want to do.
Great for thrift flipping, reselling for beginners, pricing yard sale items, or deciding whether to buy used instead of new. No account, no sign-in. Prices come from live listings and are estimates, not offers.
Install (one click or one line)
Server URL (Streamable HTTP, no auth): https://worth.area21.io/mcp
Claude
Settings → Connectors → Add custom connector → paste:
https://worth.area21.io/mcp?src=claude
Cursor
Add to Cursor (deeplink) · web install link, or add to ~/.cursor/mcp.json:
{
"mcpServers": {
"worth": { "url": "https://worth.area21.io/mcp?src=cursor" }
}
}
ChatGPT
Settings → Apps & Connectors → Advanced → enable Developer mode → Create → MCP server URL:
https://worth.area21.io/mcp?src=chatgpt
Authentication: none.
VS Code
Install in VS Code, or add to .vscode/mcp.json:
{
"servers": {
"worth": { "type": "http", "url": "https://worth.area21.io/mcp?src=vscode" }
}
}
Any other MCP client
https://worth.area21.io/mcp?src=github
Try asking
- "What's my Nintendo Switch OLED worth?"
- "Should I buy AirPods Pro 2 new or used?"
- "Where can I sell a Charizard Pokémon card for the most?"
- "Here's a photo of my grandma's lamp. Is it worth anything?"
- "Is $400 a good price for a used iPhone 14 Pro?"
Tools
| Tool | What it does for you |
|---|---|
price_item | What one item is worth from a photo or name: estimate, new and used ranges, confidence |
compare_prices | New vs. used vs. resale, so you know whether to buy used or sell |
where_to_buy_or_sell | Store and marketplace links to buy new, buy used, or sell |
All tools are read-only. Results render as an interactive price card (MCP Apps, ui://worth/price-card.html). Free daily lookups.
Free guides from Worth
- Thrifting price guides: what thrift finds are worth
- Reselling for beginners
- How to price yard sale items
- Buying used instead of new
Privacy & support
Website · Privacy · Terms · Support
Listed in the official MCP Registry as io.github.a21ai/worth. Made by Area21 Labs.
Comments
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From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.