Air quality (global)

Current air quality index and pollutant concentrations for any location: US AQI, PM2.5, PM10, ozone, NO2, SO2, CO. Open-Meteo air quality API, no key, global. ?lat=28.61&lon=77.23.

Input

Field	Type	Description
lat *	number	Latitude, -90 to 90
lon *	number	Longitude, -180 to 180

Example output

{
  "lat": 28.6139,
  "lon": 77.209,
  "airQuality": {
    "time": "2026-06-23T14:00",
    "usAqi": 142,
    "category": "Unhealthy for Sensitive Groups",
    "pm25": 52.3,
    "pm10": 88.1,
    "ozone": 45.2,
    "nitrogenDioxide": 28.7,
    "sulphurDioxide": 12.4,
    "carbonMonoxide": 420,
    "units": {
      "pm": "μg/m³",
      "gases": "μg/m³"
    }
  },
  "source": "air-quality-api.open-meteo.com (CC BY 4.0)"
}

Try it — see the 402 challenge (free)

curl -i "https://agent402.tools/api/weather-air-quality?lat=28.6139&lon=77.209"

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/weather-air-quality?lat=28.6139&lon=77.209");

Wallet-only. This tool reaches the network/browser/storage, so it is paid in USDC via x402 (no proof-of-work tier).

Part of these workflows

This tool is one step in a curated multi-tool workflow — agents can fetch the whole sequence as an MCP prompt or call https://agent402.tools/api/skill-packs/{slug}/prompt.

• Weather briefing — Full weather briefing for a location: current conditions, 7-day forecast, and air quality index in one pass.

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