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Worth

by a21ai · remote · no sign-in to list tools · v0.1.3 · published by GitHub user a21ai

Find what anything is worth: resale value, used and new prices, and where to buy or sell it.

Changes · 2
CompareRegistry entry

3 tools: 2 change things and 1 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http worth https://worth.area21.io/mcp?src=mcp_registry

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

3 tools

Changes things 2Claude Code: ask
  • price_itemPrices one item from a photo or a name.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
    • readOnlyHint: true
    • title: Price an item
  • where_to_buy_or_sellMarketplace links to buy one named item new, buy it used, or sell it.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Marketplace links to buy one named item new, buy it used, or sell it. Each link is a Worth tracking URL.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
    • readOnlyHint: true
    • title: Where to buy or sell
Only reads 1Claude Code: allow
  • compare_pricesNew, used, and resale prices for one named item.No findings

    Why it is in this group

    • The name "compare_prices" says "compare": a word for reading.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
    • readOnlyHint: true
    • title: Compare new, used, and resale

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.1.3. Values in angle brackets are yours to fill in.

claude mcp add --transport http worth https://worth.area21.io/mcp?src=mcp_registry

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__worth__compare_prices"
    ],
    "ask": [
      "mcp__worth__price_item",
      "mcp__worth__where_to_buy_or_sell"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as worth. Review it before you use it.