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CleanAirData

by chenweilie · remote · no sign-in to list tools · v0.1.0 · published by GitHub user chenweilie

Historical PM2.5 and Clean Air Score for US cities; copied records name their source city.

Changes · 1
CompareRegistry entry

3 tools: 1 change things and 2 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 cleanairdata https://cleanairdata.org/api/mcp

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
  • rank_citiesCities with the highest Clean Air Score (cleanest first), optionally within one state.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
    Cities with the highest Clean Air Score (cleanest first), optionally within one state. By default only cities with their own record are ranked, so copied records do not crowd the list. Each city is either an own_record (scored from its own data) or a copied_record (the full record of the nearest scored city, named in source_city, source_state and source_distance_miles). A copied_record describes the source city, not measurements taken in the named city. Values are historical annual data, not the current AQI.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 2Claude Code: allow
  • compare_citiesSide-by-side historical records for two US cities with the difference in Clean Air Score and PM2.5.No findings

    Why it is in this group

    • The name "compare_cities" says "compare": a word for reading.
    Description, as the server wrote it
    Side-by-side historical records for two US cities with the difference in Clean Air Score and PM2.5. Warnings list any copied record. Each city is either an own_record (scored from its own data) or a copied_record (the full record of the nearest scored city, named in source_city, source_state and source_distance_miles). A copied_record describes the source city, not measurements taken in the named city. Values are historical annual data, not the current AQI.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_city_air_qualityHistorical Clean Air Score, grade, latest annual PM2.5 mean, unhealthy-day share, trend and yearly PM2.5 for one US city.No findings

    Why it is in this group

    • The name "get_city_air_quality" says "get": a word for reading.
    Description, as the server wrote it
    Historical Clean Air Score, grade, latest annual PM2.5 mean, unhealthy-day share, trend and yearly PM2.5 for one US city. Each city is either an own_record (scored from its own data) or a copied_record (the full record of the nearest scored city, named in source_city, source_state and source_distance_miles). A copied_record describes the source city, not measurements taken in the named city. Values are historical annual data, not the current AQI.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: 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 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http cleanairdata https://cleanairdata.org/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__cleanairdata__get_city_air_quality",
      "mcp__cleanairdata__compare_cities"
    ],
    "ask": [
      "mcp__cleanairdata__rank_cities"
    ],
    "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 cleanairdata. Review it before you use it.