generated: '2026-07-27'
method: searched
source: >-
  Derived from openapi/xoserve-meter-asset-api-v1-openapi.yml,
  openapi/xoserve-meter-asset-api-v2-openapi.yml, openapi/xoserve-shipper-api-openapi.yml,
  openapi/xoserve-supplier-api-openapi.yml, then upgraded from the provider's own surfaces:
  https://discoveryapiportal.correla.com/developer/apis?api-version=2022-04-01-preview
  (subscriptionKeyParameterNames + authenticationSettings), the live WWW-Authenticate challenge on
  https://discoveryapi.correla.com (2026-07-27),
  https://www.xoserve.com/products-services/data-products/gas-apis/ and the Xoserve Try Before You Buy
  API Service Subscription Guide.
docs: https://www.xoserve.com/products-services/data-products/gas-apis/
summary:
  types:
  - apiKey
  api_key_in:
  - header
  - query
  oauth2_flows: []
  openid_connect: false
  mutual_tls: false
description: >-
  A single auth model across the whole estate: an Azure API Management subscription key, passed either
  as the `APIKey` request header or as a `subscription-key` query parameter, over HTTPS only. There is
  no OAuth 2.0, no OpenID Connect, no mTLS and no consumer-consent grant of any kind — the portal
  reports empty oAuth2AuthenticationSettings and empty openidAuthenticationSettings for all four APIs,
  and /.well-known/openid-configuration returns 404 on every host. Prefer the header form so the
  secret does not leak into logs, referrers or browser history.
schemes:
- name: apiKeyHeader
  type: apiKey
  in: header
  parameter: APIKey
  preferred: true
  sources:
  - openapi/xoserve-meter-asset-api-v1-openapi.yml
  - openapi/xoserve-meter-asset-api-v2-openapi.yml
  - openapi/xoserve-shipper-api-openapi.yml
  - openapi/xoserve-supplier-api-openapi.yml
- name: apiKeyQuery
  type: apiKey
  in: query
  parameter: subscription-key
  preferred: false
  sources:
  - openapi/xoserve-meter-asset-api-v1-openapi.yml
  - openapi/xoserve-meter-asset-api-v2-openapi.yml
  - openapi/xoserve-shipper-api-openapi.yml
  - openapi/xoserve-supplier-api-openapi.yml
challenge:
  status: 401
  header: 'WWW-Authenticate: AzureApiManagementKey realm="https://discoveryapi.correla.com/<api>",name="APIKey",type="header"'
  observed: '2026-07-27'
key_model:
  issuer: Xoserve (via Correla-operated Azure API Management)
  scope: >-
    One key per subscription. The provider's subscription guide states the APIKey "is associated with
    each created subscription and cannot be utilized for any other subscriptions." An Application
    Secret is displayed alongside the key but is explicitly not required.
  scopes: none — the API declares no OAuth scopes and no per-operation permission model
  rotation: not documented
  expiry: not documented
  transport: HTTPS only (portal reports protocols ["https"])
access_gate:
  self_serve: false
  subscription_required: true
  approval_required: true
  routes:
  - product: Supply Point Quantities (Shipper API)
    eligibility: Licensed GB gas Shippers only
    apply_to: xoserve.customer.lifecycle.team@xoserve.co.uk
    issuance: Access details provided after the subscription contract is countersigned.
  - product: Supply Point Enquiry (Supplier API)
    eligibility: REC parties, subject to the REC Data Access Matrix
    apply_to: enquiries@recmanager.co.uk (Retail Energy Code Company)
    administration: REC Portal (https://recportal.co.uk/), including an annual GES password reset process
  - product: Meter Asset Enquiry (Meter Asset v1/v2)
    eligibility: REC parties, subject to the REC Data Access Matrix
    apply_to: enquiries@recmanager.co.uk (Retail Energy Code Company)
    administration: REC Portal (https://recportal.co.uk/)
  trial:
    name: Try Before You Buy
    login: SAP S-User ID issued by Xoserve
    detail: sandbox/xoserve-sandbox.yml
notes: >-
  Browsing is open, calling is not: the portal catalogue, product descriptions and OpenAPI exports are
  all reachable anonymously, but there is no self-serve signup that ends in a working key. Because a
  key is long-lived, unscoped and carries no expiry signal, it must never be handed to a model or
  embedded client-side — see agentic-access/xoserve-agentic-access.yml.