Australian Energy Market Commission Rule Content API

openapi: 3.2.0
info:
  title: AEMC Energy Rules Rule Content API
  version: '2026-07-27'
  description: Machine-readable description of the undocumented JSON API that serves the Australian Energy Market Commission's Energy Rules application at https://energy-rules.aemc.gov.au.
  contact:
    name: AEMC
    url: https://www.aemc.gov.au/contact-us
  x-provenance:
    generated: '2026-07-27'
    method: derived
    sources:
    - https://de4oj9etm9d7w.cloudfront.net/b8470902-3d28-4902-8883-2c59d10e7818/js/app.js
    - live anonymous HTTP probes 2026-07-27
    note: Not published by AEMC. Derived by API Evangelist from AEMC's own production client bundle plus live anonymous probes of every route.
servers:
- url: https://energy-rules.aemc.gov.au/api/v1
  description: Production
tags:
- name: Rule Content
  description: The structural tree of a rule version — chapters, parts, divisions, rules and clauses.
paths:
  /rules/{versionId}/toc:
    get:
      operationId: getRuleTableOfContents
      summary: Get the full table of contents for a rule version
      description: 'Returns the complete nested structure of a rule version — chapters, parts, divisions, rules, clauses and schedules — as a recursive tree of content nodes, each with the relative link to its own content resource. Verified live 2026-07-27 for version id 803 (NER v251): 19 top-level nodes, 86 KB gzipped.'
      tags:
      - Rule Content
      parameters:
      - $ref: '#/components/parameters/VersionId'
      responses:
        '200':
          description: Table of contents tree.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/TocNode'
        '404':
          $ref: '#/components/responses/NotFound'
      x-evidence:
        probed: '2026-07-27'
        requests:
        - url: https://energy-rules.aemc.gov.au/api/v1/rules/803/toc
          status: 200
          bytes: 86222
        - url: https://energy-rules.aemc.gov.au/api/v1/rules/9999/toc
          status: 404
        - url: https://energy-rules.aemc.gov.au/api/v1/rules/251/toc
          status: 404
          note: the path parameter is the version id, not the version number
  /rules/{versionId}/chapters:
    get:
      operationId: listRuleChapters
      summary: List the top-level chapters of a rule version
      description: Returns the top-level content nodes (chapters and schedules) of a rule version without their descendants. Discovered from the `links.chapters` URL returned on every rule version object.
      tags:
      - Rule Content
      parameters:
      - $ref: '#/components/parameters/VersionId'
      responses:
        '200':
          description: Top-level chapter nodes.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/TocNode'
        '404':
          $ref: '#/components/responses/NotFound'
      x-evidence:
        probed: '2026-07-27'
        requests:
        - url: https://energy-rules.aemc.gov.au/api/v1/rules/803/chapters
          status: 200
          bytes: 3216
  /rules/{versionId}/content/{contentId}:
    get:
      operationId: getRuleContent
      summary: Get one content node of a rule version
      description: Returns a single content node — a chapter, part, division, rule or clause — with its parent, its immediate children and, for leaf nodes, the rule text. A `meta` block reports whether the version is approved, current or archived.
      tags:
      - Rule Content
      parameters:
      - $ref: '#/components/parameters/VersionId'
      - name: contentId
        in: path
        required: true
        description: Content node id, as returned in `links.self` on any table-of-contents or search result node.
        schema:
          type: integer
      - name: previewToken
        in: query
        required: false
        description: Editorial preview token. Not usable anonymously.
        schema:
          type: string
      responses:
        '200':
          description: One content node.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    $ref: '#/components/schemas/ContentNode'
                  meta:
                    $ref: '#/components/schemas/ContentMeta'
        '404':
          $ref: '#/components/responses/NotFound'
      x-evidence:
        probed: '2026-07-27'
        requests:
        - url: https://energy-rules.aemc.gov.au/api/v1/rules/803/content/872794
          status: 200
          bytes: 5567
        - url: https://energy-rules.aemc.gov.au/api/v1/rules/803/content/872796
          status: 200
          bytes: 591
components:
  schemas:
    ContentMeta:
      type: object
      properties:
        archived:
          type: integer
        approved:
          type: integer
        current:
          type: integer
        approve_link:
          type:
          - string
          - 'null'
    Error:
      type: object
      description: Error envelope observed on 404 responses. Not RFC 9457 problem+json.
      properties:
        message:
          type: string
          examples:
          - Not found
    ContentNode:
      type: object
      properties:
        id:
          type: integer
        parent_id:
          type:
          - integer
          - 'null'
        title:
          type: string
        description:
          type:
          - string
          - 'null'
        index:
          type: string
        chapter:
          type: string
        content:
          type:
          - string
          - 'null'
          description: HTML rule text for leaf nodes.
        content_type:
          type: string
        metadata:
          type:
          - object
          - 'null'
        links:
          type: object
          properties:
            self:
              type: string
              format: uri
            parent:
              type:
              - string
              - 'null'
              format: uri
        parent:
          type:
          - object
          - array
          - 'null'
          description: Parent node
          or an empty array at the root.: null
        children:
          type: array
          items:
            $ref: '#/components/schemas/ContentNode'
    TocNode:
      type: object
      properties:
        id:
          type: integer
        parent_id:
          type:
          - integer
          - 'null'
        version_id:
          type: integer
        sort_index:
          type: integer
        title:
          type: string
        description:
          type:
          - string
          - 'null'
        index:
          type: string
          description: Citation index, e.g. "1.1.1" or "11.Part ZF".
        chapter:
          type: string
        content_type:
          type: string
          description: Observed values on NER v251.
          enum:
          - chapter
          - part
          - division
          - rule
          - clause
          - chapter_schedule
          - part_schedule
        metadata:
          type:
          - object
          - 'null'
          properties:
            is_glossary:
              type: boolean
        is_glossary:
          type: boolean
        children:
          type: array
          items:
            $ref: '#/components/schemas/TocNode'
        links:
          type: object
          properties:
            self:
              type: string
              description: Relative content link, e.g. "content/872796".
  responses:
    NotFound:
      description: No such rule version, content node or term.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  parameters:
    VersionId:
      name: versionId
      in: path
      required: true
      description: The rule version **id** (the `id` field of a rule version object, e.g. 803 for NER v251) — NOT the human-facing version number. Passing the version number returns HTTP 404.
      schema:
        type: integer
        examples:
        - 803