generated: '2026-07-27'
method: derived
source: authentication/good-energy-openid-configuration.json
source_url: https://login.goodenergy.co.uk/.well-known/openid-configuration
fetched: '2026-07-27'
http_status: 200
note: >-
  Derived verbatim from the live OpenID Connect Discovery document of Good Energy's customer-login
  identity provider. There is no OpenAPI to derive securitySchemes from — Good Energy publishes no
  developer-facing API — so this profile describes the ONLY authenticated surface the company exposes
  anonymously in machine-readable form. It is a customer portal login, not a developer API auth
  model: there is no registration_endpoint, so dynamic client registration is unavailable and no
  third party can obtain a client. Access is customer-account-required.
summary:
  types:
  - openIdConnect
  - oauth2
  api_key_in: []
  oauth2_flows:
  - authorizationCode
  - implicit
  - clientCredentials
  - password
  - deviceCode
  - ciba
  developer_accessible: false
  gate: customer-account-required
schemes:
- name: GoodEnergyCustomerIdentity
  type: openIdConnect
  openIdConnectUrl: https://login.goodenergy.co.uk/.well-known/openid-configuration
  issuer: https://login.goodenergy.co.uk
  vendor_shape: Duende IdentityServer
  sources:
  - authentication/good-energy-openid-configuration.json
  endpoints:
    authorization: https://login.goodenergy.co.uk/connect/authorize
    token: https://login.goodenergy.co.uk/connect/token
    userinfo: https://login.goodenergy.co.uk/connect/userinfo
    jwks: https://login.goodenergy.co.uk/.well-known/openid-configuration/jwks
    introspection: https://login.goodenergy.co.uk/connect/introspect
    revocation: https://login.goodenergy.co.uk/connect/revocation
    end_session: https://login.goodenergy.co.uk/connect/endsession
    check_session_iframe: https://login.goodenergy.co.uk/connect/checksession
    device_authorization: https://login.goodenergy.co.uk/connect/deviceauthorization
    backchannel_authentication: https://login.goodenergy.co.uk/connect/ciba
    pushed_authorization_request: https://login.goodenergy.co.uk/connect/par
    registration: null
  grant_types:
  - authorization_code
  - client_credentials
  - refresh_token
  - implicit
  - password
  - urn:ietf:params:oauth:grant-type:device_code
  - urn:openid:params:grant-type:ciba
  response_types:
  - code
  - token
  - id_token
  - id_token token
  - code id_token
  - code token
  - code id_token token
  response_modes:
  - form_post
  - query
  - fragment
  token_endpoint_auth_methods:
  - client_secret_basic
  - client_secret_post
  pkce:
    supported: true
    methods:
    - plain
    - S256
  par:
    supported: true
    required: false
  dpop:
    signing_algs:
    - RS256
    - RS384
    - RS512
    - PS256
    - PS384
    - PS512
    - ES256
    - ES384
    - ES512
  id_token_signing_algs:
  - RS256
  subject_types:
  - public
  request_object_signing_algs:
  - RS256
  - RS384
  - RS512
  - PS256
  - PS384
  - PS512
  - ES256
  - ES384
  - ES512
  - HS256
  - HS384
  - HS512
  logout:
    frontchannel: true
    frontchannel_session: true
    backchannel: true
    backchannel_session: true
  prompt_values:
  - none
  - login
  - consent
  - select_account
  - create
  scopes:
  - openid
  - profile
  - email
  - offline_access
  - customer_portal
  - customer_portal_tariff_switch
  mutual_tls: false
  dynamic_client_registration: false
observations:
- >-
  Legacy grants are still advertised alongside modern ones — implicit and resource-owner password
  remain in grant_types_supported, and plain is still an accepted PKCE code_challenge_method.
- No mTLS / private_key_jwt client authentication is advertised; only client_secret_basic and
  client_secret_post.
- No registration_endpoint, so there is no self-serve or dynamic path to a client_id for a third
  party — the surface is closed to developers by construction, not by policy statement.
cross_references:
  scopes: scopes/good-energy-scopes.yml
  well_known: well-known/good-energy-well-known.yml
  conformance: conformance/good-energy-conformance.yml