generated: '2026-07-27'
method: searched
source: https://www.hydroone.com/saving-money-and-energy/green-button/third-party-terms-and-conditions
note: >-
  Hydro One publishes no API versioning policy, no deprecation policy, no SLA and
  no API status page. What it does publish is a contractual lifecycle for
  third-party access to Connect My Data — registration, connectivity testing,
  approval, suspension and termination — which is captured here.
versioning:
  scheme: external-standard
  current: NAESB REQ.21 ESPI (Ontario certification tied to v3.3)
  published_by_provider: false
  docs: null
  note: >-
    Versioning is inherited from the Green Button / ESPI standard rather than
    published by Hydro One. Hydro One states no version number anywhere.
deprecation:
  policy_url: null
  sunset_header: unknown
  note: >-
    No deprecation or sunset policy is published. The terms instead reserve
    unilateral amendment: "HONI reserves the right to modify this Agreement at any
    time where required by Applicable Law and with notice to Applicant", and
    Appendix A "may be updated, amended or modified from time to time by HONI at
    its sole discretion."
sla:
  url: null
  uptime_target: null
  note: >-
    No SLA. The platform is offered "AS IS" and "AS AVAILABLE", with an express
    disclaimer that operation "WILL BE UNINTERRUPTED". Hydro One commits only to
    "commercially reasonable efforts to ensure that the Customer Data is the same
    accuracy and quality as the energy data that is provided by HONI to customers
    via Download My Data".
status_page: null
status_page_note: >-
  No API or platform status page exists. https://www.hydroone.com/StormCenter
  (HTTP 200) redirects to a KUBRA-hosted Storm Center outage map SPA at
  https://d8bkcndcv6jca.cloudfront.net/ — a consumer outage widget operated by a
  vendor, not a Hydro One service-status surface and not a documented API. No
  `StatusPage` pointer is emitted.
access_lifecycle:
  states:
  - id: registered
    description: Applicant accepts the terms and registers on the HONI third-party portal.
  - id: ready-to-test
    description: >-
      HONI account executive provides Client ID, Client Secret, Test Accounts and
      URI(s); the portal shows the status "Ready To Test".
  - id: approved
    description: >-
      Connectivity testing completed successfully and documents signed; the portal
      shows the status "Approved" and the vendor may connect production customers.
  - id: declined
    description: >-
      HONI reserves the right to reject any registration that does not complete
      connectivity testing within 90 days; additional information is provided to
      the applicant.
  - id: suspended
    description: >-
      HONI may suspend access without notice where ordered by the OEB or on
      reasonable evidence of material breach posing risk of harm. Prior customer
      authorizations survive a lifted suspension.
  - id: terminated
    description: >-
      HONI may terminate on material breach (15 days to cure if curable); the
      applicant may terminate for convenience on 30 days written notice.
  connectivity_test_window_days: 90
  cure_period_days: 15
  vendor_termination_notice_days: 30
data_retention:
  policy: >-
    The applicant must destroy or delete Customer Data sent in error or where
    required by Applicable Law, retaining at most one archival copy for the
    minimum period Applicable Law requires.
  survives_termination: true
deprecated_operations: []
change_communication:
  changelog: null
  changelog_note: No API changelog or release notes are published.
  news: https://www.hydroone.com/newsroom
  contact: greenbutton@HydroOne.com
related:
- conformance/hydro-one-conformance.yml
- conventions/hydro-one-conventions.yml