Gios Air

Local MCP server for the GIOŚ (Główny Inspektorat Ochrony Środowiska) air-quality public API — the official Polish state environmental monitoring feed for PM2.5, PM10, NO2, SO2, O3, CO, C6H6, and the composite air-quality index.

Part of the honest-mcp family of small, auditable, local-first MCP servers.

Why

If you live in a Polish city — especially over winter — the difference between "moderate" and "very poor" air-quality index matters (indoor training vs opening the window). GIOŚ runs close to 300 stations and a public API, but only in Polish JSON-LD. This server maps the main fields to English keys (see Output keys) and hands the data to your AI so you can ask "how's the air in Kraków this afternoon?"

Features

Four tools:

• list_stations — search the station network by city or voivodeship
• get_station_sensors — list the sensors installed at a station
• get_sensor_readings — recent measurements (~24h) from one sensor
• get_air_index — composite index for a station (very good / good / moderate / poor / very poor / hazardous; category names are returned in Polish) with the critical pollutant code

Output keys

Only some upstream Polish keys are mapped to English; the rest pass through unchanged, and values are never translated.

• list_stations, get_sensor_readings — all fields use English keys.
• get_station_sensors — all fields use English keys (including indicator_id).
• get_air_index — only station_id, index_calculated_at, index_source_data_at, index_category and critical_pollutant_code are English; all other fields — overall index value, per-pollutant fields (e.g. Wartość indeksu dla wskaźnika PM10) and the status flag — keep their Polish keys.
• Text values stay in Polish, e.g. index_category: "Bardzo dobry" (very good) or indicator_name: "tlenek węgla" (carbon monoxide).

Data source

• Endpoint: api.gios.gov.pl/pjp-api/v1 — GIOŚ public JSON-LD API
• No API key
• Refresh: hourly per sensor

Requirements

• Python 3.10+

Setup

git clone https://github.com/bartosz-kuc/honest-gios-air-mcp.git
cd honest-gios-air-mcp
python3 -m venv venv
./venv/bin/pip install -r requirements.txt

On Windows use venv\Scripts\pip and venv\Scripts\python.exe instead of the venv/bin/... paths shown here and below.

Register with Claude Code:

claude mcp add gios-air /absolute/path/to/venv/bin/python /absolute/path/to/server.py

Claude Desktop claude_desktop_config.json:

{
  "mcpServers": {
    "gios-air": {
      "command": "/absolute/path/to/venv/bin/python",
      "args": ["/absolute/path/to/server.py"]
    }
  }
}

Example usage

"How's the air in Kraków right now?"

Two-step: list_stations(city="Kraków", limit=5) → pick a station ID → get_air_index(station_id=...) → category name (in Polish) and the critical pollutant code.

"PM2.5 readings for the last 24h from station 400."

get_station_sensors(station_id=400) → find the PM2.5 sensor ID → get_sensor_readings(sensor_id=...).

Data flow

Your AI client
     ↕  MCP stdio
This server (Python, on your machine)
     ↕  HTTPS
api.gios.gov.pl (GIOŚ)

No cloud middle. No telemetry.

Author

Bartosz Kuć — Warsaw-based developer, JDG owner running skanfirmy.pl.

• GitHub: https://github.com/bartosz-kuc

• Email: [email protected]

Consulting

Available for consulting on Polish tax and business integrations (KSeF, GUS/NFZ/GIOŚ APIs, mBank data), MCP server design, and AI-assisted tooling for JDGs and small teams. See skanfirmy.pl/uslugi for productized packages (audit 3k PLN, setup 8-15k PLN, retainer 2-4k PLN/mo), or reach out via email.

License

MIT — see LICENSE.

Related

• Part of the honest-mcp family — see the family index.