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FairStash — Roblox trade values

by fairstash.app · remote · no sign-in to list tools · v1.0.0 · published by app.fairstash

Roblox trade values and trade fairness for MM2, Adopt Me and Flee the Facility.

Changes · 1
CompareRegistry entry

4 tools: 1 change things and 3 only read.

Scanned Oct 21, 2026

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

claude mcp add --transport http roblox-trade-values https://fairstash.app/api/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warncheck_trade

    The server marks "check_trade" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The description's first verb is "add": a word for a change.

    What this check looks for

Tools

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

4 tools

Changes things 1Claude Code: ask
  • check_tradeAdds up both sides of a proposed trade in one game and answers win, fair or lose, with the gap in per cent.1 finding

    Why it is in this group

    • The description's first verb is "add": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "check_trade" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"openWorldHint":false}; The description's first verb is "add": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Adds up both sides of a proposed trade in one game and answers win, fair or lose, with the gap in per cent. Both sides are written as the player would say them: "2 party balloons, sakura" or "neon shadow dragon". A trade that mixes two games is refused rather than calculated: the three games use different scales that cannot be added together.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
    • destructiveHint: false
Only reads 3Claude Code: allow
  • get_valueWhat one item is worth in a Roblox trading game — Flee the Facility (FTF), Murder Mystery 2 (MM2) or Adopt Me.No findings

    Why it is in this group

    • The name "get_value" says "get": a word for reading.
    Description, as the server wrote it
    What one item is worth in a Roblox trading game — Flee the Facility (FTF), Murder Mystery 2 (MM2) or Adopt Me. Returns the community trade value, how wanted the item is, where it stands in its own catalogue, how often it turned up in the newest marketplace listings, and the date the numbers were collected. Use it for questions like "how much is a Chroma Luger worth in MM2". Values are community estimates, not official Roblox prices.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
    • destructiveHint: false
  • list_valuesThe most valuable items in one game, most valuable first, with their community values and page links.No findings

    Why it is in this group

    • The name "list_values" says "list": a word for reading.
    Description, as the server wrote it
    The most valuable items in one game, most valuable first, with their community values and page links. Optionally narrowed to one section of the catalogue (for MM2: godly, ancient, sets, pets, chroma, knife, gun…). Use it for "what are the most expensive knives in MM2" or to see what a game's scale looks like.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
    • destructiveHint: false
  • search_itemsFinds items across all three games by a partial name and returns the candidates with their game, value and page link.No findings

    Why it is in this group

    • The name "search_items" says "search": a word for reading.
    Description, as the server wrote it
    Finds items across all three games by a partial name and returns the candidates with their game, value and page link. Use it when the name a player wrote is ambiguous, misspelled or could belong to more than one game, before asking get_value for the exact one.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: false
    • destructiveHint: false

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 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http roblox-trade-values https://fairstash.app/api/mcp

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__roblox-trade-values__get_value",
      "mcp__roblox-trade-values__list_values",
      "mcp__roblox-trade-values__search_items"
    ],
    "ask": [
      "mcp__roblox-trade-values__check_trade"
    ],
    "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 roblox-trade-values. Review it before you use it.