# Simply Energy (ENGIE) > Simply Energy is the former brand of the Australian electricity and gas retailer that now > trades as ENGIE, operated by IPower Pty Ltd and IPower 2 Pty Ltd (ABN 67 269 241 237), > supplying more than 700,000 residential and business accounts across Victoria, South > Australia, New South Wales, Queensland and Western Australia. It rebranded from Simply > Energy to ENGIE in April 2024. Its entire API surface exists because of a statutory mandate: > it is a designated Consumer Data Right energy data holder (provider number DH002028), listed > on the live CDR Register under the ENGIE brand. Two surfaces are anonymously usable today - > generic tariff data (2,452 live ENGIE plans) and CDS discovery status/outages. Everything > else - usage, billing, invoices, service points, DER - is reachable only by an ACCC > accredited data recipient acting on explicit consumer consent. There is no developer portal, > no self-serve API key and no voluntary open data. No /llms.txt is published on any host in this provider's surface (engie.com.au and www.simplyenergy.com.au return HTTP 403 to automated fetchers; the two CDR hosts return 404). This file is GENERATED by API Evangelist from apis.yml and the artifacts in this repository. ## Public APIs (no credentials required) - [CDR Energy Generic Plans API](https://cdr.energymadeeasy.gov.au/engie/cds-au/v1/energy/plans): 2,452 live ENGIE electricity and gas tariff plans (MARKET and STANDING) across the Ausgrid, Endeavour, Essential Energy, Energex, SA Power Networks, Jemena and AGN distribution zones. Send `x-v: 1`. Plan detail at `/energy/plans/{planId}` with `x-v: 3`. Hosted on the retailer's behalf by the Australian Energy Regulator's Energy Made Easy service. - [CDR Discovery API](https://public.cdr.engie.com.au/cds-au/v1/discovery/status): CDS Common status and outages, served from the brand's own registered CDR Public Base URI. Send `x-v: 1`. `/discovery/outages` returns scheduled outages. ## Accredited-only API - CDR Energy Consumer Data API: energy accounts, balances, billing, invoices, concessions, payment schedules, electricity service points, usage and distributed energy resources. No base URL is published anonymously - a data holder's InfoSec and resource base URIs are released only through the authenticated portion of the CDR Register to an accredited data recipient presenting a client certificate. ## Specifications - [CDR Energy API v1.36.0 (OpenAPI 3.0.3)](openapi/simply-energy-cds-energy-openapi.yml): 18 paths, 23 operations. The shared Data Standards Body contract, harvested verbatim. - [CDR Common API v1.36.0 (OpenAPI 3.0.3)](openapi/simply-energy-cds-common-openapi.yml): 4 paths, 4 operations. - [Energy overlay](overlays/simply-energy-cds-energy-overlay.yaml) and [Common overlay](overlays/simply-energy-cds-common-overlay.yaml): API Evangelist enhancements binding the shared specs to this provider's real confirmed hosts. ## Machine-readable artifacts in this repository - [Authentication profile](authentication/simply-energy-authentication.yml): none for public endpoints; OAuth2/OIDC under the CDR FAPI 1.0 Advanced profile with MTLS, PAR and PKCE for consumer data. - [OAuth scopes](scopes/simply-energy-scopes.yml): the ten CDR authorisation scopes, with the consumer-facing data cluster and permission language. - [API conventions](conventions/simply-energy-conventions.yml): `x-v` version negotiation, `x-fapi-interaction-id` tracing, page/page-size pagination, ID permanence, CORS, and the explicit absence of any idempotency key. - [Error catalogue](errors/simply-energy-problem-types.yml): the full `urn:au-cds:error:*` registry. Note this is NOT RFC 9457 - CDS uses its own `errors[]` envelope on `application/json`. - [Rate limits](rate-limits/simply-energy-rate-limits.yml): the CDS traffic thresholds, including 300 TPS total for public unauthenticated traffic. - [Lifecycle](lifecycle/simply-energy-lifecycle.yml): dual URI + header versioning, the Endpoint Version Schedule as the deprecation instrument, and the 99.5%-per-month availability obligation. - [Changelog](changelog/simply-energy-changelog.yml): the Consumer Data Standards release history (current 1.36.0, 4 December 2025). - [Conformance](conformance/simply-energy-conformance.yml): what was verified live on the wire versus what is designated but not anonymously verifiable. - [Data model](data-model/simply-energy-data-model.yml): 14 entities, 15 relationships derived from the specs. - [Domain security](security/simply-energy-domain-security.yml): TLS, HSTS, DNSSEC, CAA, SPF and DMARC probe results. - [Agentic access](agentic-access/simply-energy-agentic-access.yml): recommended `x-agentic-access` execution contracts for all 27 operations. - [Agent skills](skills/_index.yml): packaged operating instructions for the flows an agent can actually run. - [Candidate MCP surface](mcp/simply-energy-mcp.yml): derived proposal. No MCP server is published. - [Packages](packages/simply-energy-packages.yml): no first-party SDK exists in any registry. ## Governing documentation - [Consumer Data Standards](https://consumerdatastandardsaustralia.github.io/standards/): the binding technical standard, v1.36.0. - [CDS Energy APIs](https://consumerdatastandardsaustralia.github.io/standards/#energy-apis) - [CDS Common APIs](https://consumerdatastandardsaustralia.github.io/standards/#common-apis) - [CDS Security Profile](https://consumerdatastandardsaustralia.github.io/standards/#security-profile) - [CDR Register - energy data holder brands](https://api.cdr.gov.au/cdr-register/v1/energy/data-holders/brands/summary): send `x-v: 1`. ENGIE appears with `publicBaseUri` `https://public.cdr.engie.com.au`; there is no brand named "Simply Energy". - [ENGIE CDR Policy](https://engie.com.au/help-centre/cdr-policy): the company's own CDR policy. Returns HTTP 403 to automated fetchers. ## What does not exist - No developer portal. `developer.simplyenergy.com.au`, `api.simplyenergy.com.au`, `docs.simplyenergy.com.au`, `data.simplyenergy.com.au`, `developer.engie.com.au`, `api.engie.com.au`, `docs.engie.com.au` and `data.engie.com.au` do not resolve. - No self-serve signup, no API keys, no sandbox tier, no partner API. - No webhooks, events, streaming or AsyncAPI - the CDR energy data-holder contract has no event surface at all. - No first-party SDK or CLI in any package registry. - No published SOC 2 / ISO 27001 certification, trust centre or vulnerability disclosure programme. - No open grid, market or wholesale data. This is a retailer; NEM dispatch and network data sit with AEMO and the distribution businesses.