aid: waqi
name: World Air Quality Index (WAQI)
description: >
  The World Air Quality Index (WAQI) REST API provides real-time air quality
  data, AQI readings, pollutant measurements, and station data for more than
  12,000 monitoring stations worldwide. The API delivers city-level and
  station-level air quality index values for pollutants including PM2.5, PM10,
  NO2, CO, SO2, and Ozone, along with geo-location queries, weather conditions,
  and 3-8 day forecast data. Access is free for non-commercial use and requires
  a token obtained from the Air Quality Open Data Platform.
type: Index
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
url: https://raw.githubusercontent.com/api-evangelist/waqi/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
  - Air Quality
  - AQI
  - Environment
  - Pollution
  - Real-Time Data
  - Weather
  - IoT
  - Open Data
apis:
  - aid: waqi:waqi-json-api
    name: WAQI JSON API
    description: >
      The primary programmatic interface for real-time air quality data.
      Provides access to more than 12,000 station-level and 1,000 city-level
      data points with geo-location queries and individual AQI readings for
      all major pollutants. Supports city feed, geo-localized feed, search,
      and forecast endpoints. Authentication via API token obtained from the
      Air Quality Open Data Platform.
    image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
    humanURL: https://aqicn.org/api/
    baseURL: https://api.waqi.info
    tags:
      - Air Quality
      - AQI
      - JSON API
      - Environment
      - Pollution
      - Real-Time
    properties:
      - type: Documentation
        url: https://aqicn.org/json-api/doc/
      - type: Authentication
        url: https://aqicn.org/data-platform/token/
      - type: OpenAPI
        url: openapi/waqi-openapi.json
common:
  - type: Website
    url: https://waqi.info/
  - type: Website
    url: https://aqicn.org/
  - type: Documentation
    url: https://aqicn.org/json-api/doc/
  - type: GitHubOrg
    url: https://github.com/waqi-dev-community
  - type: Pricing
    url: https://aqicn.org/api/
  - type: Plans
    url: plans/waqi-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/waqi-rate-limits.yml
  - type: FinOps
    url: finops/waqi-finops.yml
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com