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MapleStats MCP

by dsanchezp18 · remote · local (pypi) · no sign-in to list tools · v0.4.0 · published by GitHub user dsanchezp18

Canadian open data: StatCan, Census, PUMFs, Bank of Canada, CMHC and open-data portals (EN/FR).

Changes · 1
CompareRegistry entry

3 tools: 1 change things and 2 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 maplestats https://maplestats-mcp.onrender.com/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warncall_tool

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

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "call_tool" says "call": 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.

3 tools

Changes things 1Claude Code: ask
  • call_toolRun one data tool found through search_tools or plan_query.1 finding

    Why it is in this group

    • The name "call_tool" says "call": 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 "call_tool" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "call_tool" says "call": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Run one data tool found through search_tools or plan_query. Use for: executing a tool by exact name with arguments that match the inputSchema search_tools returned for it. Data tools read public sources (StatCan, Bank of Canada, open-data portals). reproduce_workbook can save an Excel file on a local stdio server; hosted exports return base64. Returns that tool's typed result, including a provenance block (source, URL, query time, freshness). Errors come back as MCP tool errors, not as data: an unknown or misspelled name raises 'Unknown tool' (search again for the exact name), invalid arguments raise a validation error naming the field, and upstream outages or empty matches raise a typed error explaining what to change. search_tools, call_tool and plan_query cannot be called through it; call them directly. Tool calls are subject to the server's timeout (MAPLE_TOOL_TIMEOUT_SECONDS, default 120).

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
    • readOnlyHint: true
Only reads 2Claude Code: allow
  • plan_queryPlan which sources answer a question that may span several agencies.No findings

    Why it is in this group

    • The name "plan_query" says "query": a word for reading.
    Description, as the server wrote it
    Plan which sources answer a question that may span several agencies. Use for: the first call on a substantive question ("How have rents and interest rates moved in Calgary since 2020?"). Returns the topics it touches, the tools to call for each in order, local portals for any province or city named, and caveats on combining them. Then run the steps with call_tool. Read-only and offline: it matches the question against this server's source map and calls no external API. Use search_tools instead to find a single tool for a narrow, single-source need. lang='fr' gives the labels, purposes, caveats and guidance in French; tool and argument names stay as they are. Keywords: plan, which data source, where to find, combine sources, cross-source, question, research, Canada data. Mots-clés : planifier, quelle source de données, où trouver, combiner des sources, question, recherche, données canadiennes, statistiques.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • readOnlyHint: true
  • search_toolsFind the right data tool for one specific need by plain-language search.No findings

    Why it is in this group

    • The name "search_tools" says "search": a word for reading.
    Description, as the server wrote it
    Find the right data tool for one specific need by plain-language search. Use for: locating a tool when you know roughly what data you want (a StatCan table, Bank of Canada series, a city's open-data portal). Returns the best-matching tool definitions, ranked by relevance, each with its name, description and full input schema, in the same format as list_tools. Read-only; it searches this server's catalogue only and calls no external API. Use plan_query instead when a question may span several sources or you do not know where to start; use call_tool to run a tool once you have its name. Queries in English or French both work. An empty result means no tool matched: rephrase with topic words (e.g. 'housing starts' rather than 'CMHC table').

    Annotations the server declares

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

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

claude mcp add --transport http maplestats https://maplestats-mcp.onrender.com/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__maplestats__plan_query",
      "mcp__maplestats__search_tools"
    ],
    "ask": [
      "mcp__maplestats__call_tool"
    ],
    "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 maplestats. Review it before you use it.