generated: '2026-09-05'
method: searched
source: >-
  Provider documentation and GitHub release history, verified 2026-09-05. Each claim below names
  the URL it came from; absences were probed, not assumed.
versioning:
  scheme: mixed
  note: >-
    CDC versions per surface, not agency-wide. There is no single API version, no version header,
    and no published cross-agency versioning policy.
  surfaces:
    - surface: SODA (data.cdc.gov, chronicdata.cdc.gov)
      scheme: uri-path
      current: '2.1'
      also_available: '3.0 (/api/v3/views/{id}/query.json)'
      docs: https://dev.socrata.com/docs/endpoints.html
      note: Versioning is set by the platform vendor (Socrata / Tyler Data & Insights), not by CDC.
    - surface: Content Syndication
      scheme: uri-path
      current: v2
      docs: https://tools.cdc.gov/api/docs/info.aspx
    - surface: Environmental Public Health Tracking
      scheme: uri-path
      current: v1
      base: https://ephtracking.cdc.gov/apigateway/api/v1
      probed: '2026-09-05, HTTP 200 anonymous on /contentareas/json'
    - surface: CDC WONDER
      scheme: database-id
      current: 'per-database (e.g. D76 Detailed Mortality)'
      docs: https://wonder.cdc.gov/wonder/help/wonder-api.html
    - surface: DIBBs eCR Refiner
      scheme: semver
      current: 1.0.0
      released: '2026-09-04'
      docs: https://github.com/CDCgov/dibbs-ecr-refiner/releases
    - surface: DIBBs Query Connector
      scheme: semver
      current: v1.2.2
      released: '2026-09-02'
      docs: https://github.com/CDCgov/dibbs-query-connector/releases
deprecation:
  policy_url: null
  sunset_header: false
  note: >-
    No deprecation policy, Sunset/Deprecation header support, or retirement calendar was found on
    any CDC surface. This absence is material: CDC retired its developer portal without one — see
    retired_surfaces below.
sla:
  url: null
  uptime_target: null
  note: CDC publishes no SLA for any of these APIs; they are free public-domain data services.
status_page: null
status_page_note: >-
  CDC operates no status page for its APIs. https://status.socrata.com/ ("Tyler Data & Insights
  System Status", HTTP 200 on 2026-09-05) covers the Socrata platform that data.cdc.gov and
  chronicdata.cdc.gov run on, but it is the VENDOR's page, not CDC's, and it says nothing about
  CDC WONDER, the Tracking Network API, or Content Syndication. No StatusPage pointer is emitted
  on the strength of a supplier's page.
retired_surfaces:
  - name: open.cdc.gov (CDC Open Technology developer portal and API index)
    status: decommissioned
    evidence: >-
      No DNS A record as of 2026-09-05 (NOERROR/NODATA under the cdc.gov SOA at both 8.8.8.8 and
      1.1.1.1); curl fails with "Could not resolve host". The site's source repository
      CDCgov/opencdc was ARCHIVED on 2024-03-21 and still carries the agency's own API index at
      _data/apis.yml.
    impact: >-
      CDC no longer publishes a developer portal or an API directory anywhere. This was the single
      entry point that told a developer which CDC APIs exist; nothing replaced it. Removed from
      apis.yml in this pass.
  - name: https://wonder.cdc.gov/wonder/help/WONDER-API.html
    status: moved
    evidence: 404 on 2026-09-05; the live document is the lowercase https://wonder.cdc.gov/wonder/help/wonder-api.html (HTTP 200). Corrected in apis.yml.
  - name: https://ephtracking.cdc.gov/apihelp
    status: gone
    evidence: >-
      404 on 2026-09-05 (also /apihelp/). The API itself is still live and anonymous —
      https://ephtracking.cdc.gov/apigateway/api/v1/contentareas/json returned HTTP 200 with real
      JSON on the same date — so the Tracking Network API is now an UNDOCUMENTED live API.
      Removed from apis.yml.
  - name: https://wonder.cdc.gov/nndss/nndss_table_menus.asp
    status: gone
    evidence: 404 on 2026-09-05. Removed from apis.yml.
deprecated_operations: []