name: WAQI Rate Limits
description: Rate limiting details for the World Air Quality Index API
url: https://aqicn.org/api/
limits:
  - name: Default Request Quota
    description: >
      The default rate limit for all API tokens is 1,000 requests per second.
      This applies to all endpoints including the city feed, geo-localized feed,
      search, and map query endpoints.
    requests: 1000
    per: second
    scope: per token
    note: >
      Custom quotas are available for organizations that need higher throughput.
      Contact the WAQI team at aqicn.org/contact/ to request an increased quota.
  - name: Acceptable Usage Policy
    description: >
      All API usage is subject to an acceptable usage policy. Data cannot be
      cached, redistributed, or used in commercial products. Attribution is
      required. For-profit corporate use requires an explicit written agreement
      with the WAQI project team.
    restrictions:
      - No data redistribution or caching
      - No commercial product inclusion
      - Mandatory attribution
      - Non-profit email notification required
      - For-profit written agreement required
authentication:
  type: API Token (query parameter)
  parameter: token
  registration: https://aqicn.org/data-platform/token/
  note: >
    A valid token must be included with every API request as a query
    parameter. Tokens are obtained free of charge by registering at the
    Air Quality Open Data Platform with a valid email address.