generated: '2026-09-06'
method: searched
source: >-
  PyPI (pypi.org/pypi/<pkg>/json), CRAN (crandb.r-pkg.org), the npm registry search API, and the
  USEPA + US-EPA-CAMD GitHub organizations, probed 2026-09-06.
note: >-
  EPA ships first-party client libraries only for the Air Quality System (AQS) Data Mart API, and
  ships them as a matched pair — RAQSAPI for R and pyaqsapi for Python — both maintained in the
  USEPA GitHub organization by EPA Region 3 staff. No first-party client library was found for
  Envirofacts, ECHO, the UV Index service, or the Clean Air Markets (EASEY) APIs; for EASEY, EPA
  publishes worked request examples (USEPA/cam-api-examples) rather than a packaged SDK.
  @us-epa-camd/easey-design-system exists on npm but is NOT first-party — it was published in 2023
  by an unrelated individual at v0.0.1-beta and is recorded here only so it is not mistaken for one.
packages:
  - language: python
    registry: pypi
    name: pyaqsapi
    url: https://pypi.org/project/pyaqsapi/
    install: pip install pyaqsapi
    official: true
    api: EPA Air Quality System (AQS) API
    version: 1.0.2
    published: '2025-05-07'
    repository: https://github.com/USEPA/pyaqsapi
    docs: https://usepa.github.io/pyaqsapi/
    note: >-
      Maintained in the USEPA GitHub organization; the PyPI project_urls point at aqs.epa.gov and
      the sibling R package. Last release 2025-05-07 — roughly sixteen months before this probe.
  - language: r
    registry: cran
    name: RAQSAPI
    url: https://cran.r-project.org/package=RAQSAPI
    install: install.packages("RAQSAPI")
    official: true
    api: EPA Air Quality System (AQS) API
    version: 2.0.5
    published: '2024-06-12'
    repository: https://github.com/USEPA/RAQSAPI/
    docs: https://aqs.epa.gov/aqsweb/documents/data_api.html
    note: >-
      CRAN metadata credits Clinton Mccrowey, US EPA Region 3 Air and Radiation Division, as author
      and maintainer. Last CRAN publication 2024-06-12 — the oldest first-party artifact in this
      record and the clearest decay signal on the AQS surface.
  - language: javascript
    registry: npm
    name: "@us-epa-camd/easey-design-system"
    url: https://www.npmjs.com/package/@us-epa-camd/easey-design-system
    official: false
    version: 0.0.1-beta
    published: '2023-07-04'
    note: >-
      NOT an EPA package. The npm scope matches EPA's Clean Air Markets GitHub organization but the
      publisher is an unrelated individual and the package never left 0.0.1-beta. EPA's real design
      system lives at github.com/US-EPA-CAMD/easey-design-system and is not published to npm.
  - language: none
    registry: github
    name: USEPA/cam-api-examples
    url: https://github.com/USEPA/cam-api-examples
    official: true
    version: null
    published: '2025-06-17'
    note: >-
      Not a package — Python request examples for the Clean Air Markets (EASEY) APIs, distributed
      only as a repository with no tagged release and no registry entry, so there is no version to
      record. `published:` is the last push date observed on 2026-09-06.