openapi: 3.2.0
info:
  title: ISO New England Web Services API v1.1 Hbdayaheaddemandbid API
  version: '1.1'
  description: RESTful interface to ISO New England energy and market data. This OpenAPI document was DERIVED by API Evangelist from ISO New England's own published, machine-generated Enunciate technical documentation at https://webservices.iso-ne.com/docs/v1.1/ and the two XML Schemas it publishes (ns0.xsd, ns1.xsd, saved verbatim under schemas/). ISO New England does not publish an OpenAPI definition; the only provider-published machine-readable description of the interface is a WADL at https://webservices.iso-ne.com/api/v1.1?_wadl&_type=xml, which sits behind the same HTTP Basic authentication as the API and returned HTTP 401 to anonymous probes. Every path, method, parameter, description, media type and schema in this document is copied from the provider's published sources; nothing was invented. Each operation carries x-evidence naming the exact documentation page it came from. All feeds are available in XML and JSON, selected by adding a .xml or .json extension to the request URL or by sending an Accept header of application/xml or application/json.
  contact:
    name: ISO New England Ask ISO
    url: https://askiso.iso-ne.com/s/
  x-provenance:
    method: derived
    derived_by: API Evangelist enrichment pipeline
    derived_on: '2026-07-27'
    sources:
    - https://webservices.iso-ne.com/docs/v1.1/
    - https://webservices.iso-ne.com/docs/v1.1/ns0.xsd
    - https://webservices.iso-ne.com/docs/v1.1/ns1.xsd
    - https://www.iso-ne.com/participate/support/web-services-data
    not_provider_published: true
    note: Derived from provider-published HTML documentation and XSDs. Not an ISO New England artifact.
servers:
- url: https://webservices.iso-ne.com/api/v1.1
  description: Production base path (HTTP Basic over SSL)
security:
- basicAuth: []
tags:
- name: hbdayaheaddemandbid
  description: 6 path template(s) under /hbdayaheaddemandbid in the published ISO New England Web Services API v1.1 documentation.
paths:
  /hbdayaheaddemandbid:
    get:
      operationId: getHbdayaheaddemandbid
      summary: Default resource
      description: Default resource. Redirects to Day Ahead Demand Bids.
      tags:
      - hbdayaheaddemandbid
      responses:
        '200':
          description: Successful response.
          content:
            application/xml:
              schema:
                description: Response payload is not described in the published documentation.
            application/json:
              schema:
                description: Response payload is not described in the published documentation.
        '401':
          description: Unauthorized - HTTP Basic credentials from an ISO Express account are required. Verified by anonymous probe on 2026-07-27.
      x-evidence:
        source: https://webservices.iso-ne.com/docs/v1.1/rest.hbdayaheaddemandbid.html
        harvested: '2026-07-27'
  /hbdayaheaddemandbid/current:
    get:
      operationId: getHbdayaheaddemandbidCurrent
      summary: Get the current Day Ahead Demand Bids for Hub, Load Zones, and External Nodes
      description: Get the current Day Ahead Demand Bids for Hub, Load Zones, and External Nodes.
      tags:
      - hbdayaheaddemandbid
      responses:
        '200':
          description: a Ahead Demand BidsElement containing the current Day Ahead Demand Bids.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/HbDayAheadDemandBids'
            application/json:
              schema:
                $ref: '#/components/schemas/HbDayAheadDemandBids'
        '401':
          description: Unauthorized - HTTP Basic credentials from an ISO Express account are required. Verified by anonymous probe on 2026-07-27.
      x-evidence:
        source: https://webservices.iso-ne.com/docs/v1.1/rest.hbdayaheaddemandbid.current.html
        harvested: '2026-07-27'
      x-xml-element: HbDayAheadDemandBids
  /hbdayaheaddemandbid/day/{day}:
    get:
      operationId: getHbdayaheaddemandbidDayByDay
      summary: Get the Day Ahead Demand Bids for the given day
      description: Get the Day Ahead Demand Bids for the given day.
      tags:
      - hbdayaheaddemandbid
      responses:
        '200':
          description: a Ahead Demand BidsElement containing the Ahead Demand Bids.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/HbDayAheadDemandBids'
            application/json:
              schema:
                $ref: '#/components/schemas/HbDayAheadDemandBids'
        '401':
          description: Unauthorized - HTTP Basic credentials from an ISO Express account are required. Verified by anonymous probe on 2026-07-27.
      x-evidence:
        source: https://webservices.iso-ne.com/docs/v1.1/rest.hbdayaheaddemandbid.day.day.html
        harvested: '2026-07-27'
      x-xml-element: HbDayAheadDemandBids
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
  /hbdayaheaddemandbid/day/{day}/bidType/{bidType}:
    get:
      operationId: getHbdayaheaddemandbidDayByDayBidTypeByBidType
      summary: GET /hbdayaheaddemandbid/day/{day}/bidType/{bidType}
      description: (no documentation provided)
      tags:
      - hbdayaheaddemandbid
      responses:
        '200':
          description: Successful response.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/HbDayAheadDemandBids'
            application/json:
              schema:
                $ref: '#/components/schemas/HbDayAheadDemandBids'
        '401':
          description: Unauthorized - HTTP Basic credentials from an ISO Express account are required. Verified by anonymous probe on 2026-07-27.
      x-evidence:
        source: https://webservices.iso-ne.com/docs/v1.1/rest.hbdayaheaddemandbid.day.day.bidType.bidType.html
        harvested: '2026-07-27'
      x-xml-element: HbDayAheadDemandBids
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
      - name: bidType
        in: path
        required: true
        schema:
          type: string
  /hbdayaheaddemandbid/day/{day}/locationType/{locationType}:
    get:
      operationId: getHbdayaheaddemandbidDayByDayLocationTypeByLocationType
      summary: Get the Day Ahead Demand Bids for the given day based on given Location Type
      description: Get the Day Ahead Demand Bids for the given day based on given Location Type.
      tags:
      - hbdayaheaddemandbid
      responses:
        '200':
          description: a Ahead Demand BidsElement containing the Ahead Demand Bids.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/HbDayAheadDemandBids'
            application/json:
              schema:
                $ref: '#/components/schemas/HbDayAheadDemandBids'
        '401':
          description: Unauthorized - HTTP Basic credentials from an ISO Express account are required. Verified by anonymous probe on 2026-07-27.
      x-evidence:
        source: https://webservices.iso-ne.com/docs/v1.1/rest.hbdayaheaddemandbid.day.day.locationType.locationType.html
        harvested: '2026-07-27'
      x-xml-element: HbDayAheadDemandBids
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
      - name: locationType
        in: path
        required: true
        schema:
          type: string
  /hbdayaheaddemandbid/info:
    get:
      operationId: getHbdayaheaddemandbidInfo
      summary: Get the Service Info for Day Ahead Demand Bids
      description: Get the Service Info for Day Ahead Demand Bids.
      tags:
      - hbdayaheaddemandbid
      responses:
        '200':
          description: the ServiceInfoElement for Day Ahead Demand Bids.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/ServiceInfo'
            application/json:
              schema:
                $ref: '#/components/schemas/ServiceInfo'
        '401':
          description: Unauthorized - HTTP Basic credentials from an ISO Express account are required. Verified by anonymous probe on 2026-07-27.
      x-evidence:
        source: https://webservices.iso-ne.com/docs/v1.1/rest.hbdayaheaddemandbid.info.html
        harvested: '2026-07-27'
      x-xml-element: ServiceInfo
components:
  schemas:
    Segments:
      type: object
      properties:
        Segment:
          type: array
          items:
            $ref: '#/components/schemas/Segment'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_Segments
    Segment:
      type: object
      properties:
        Price:
          type: number
        Mw:
          type: number
        '@Number':
          type: integer
      required:
      - '@Number'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_Segment
    ServiceInfo:
      type: object
      properties:
        LatestBeginDate:
          type: string
          format: date-time
        CreationDate:
          type: string
          format: date-time
      required:
      - LatestBeginDate
      - CreationDate
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_ServiceInfo
    HbDayAheadDemandBid:
      type: object
      properties:
        BeginDate:
          type: string
          format: date-time
        MaskedParticipantId:
          type: integer
        MaskedLocationId:
          type: integer
        LocationType:
          type: string
          enum:
          - NETWORK AREA
          - LOAD ZONE
          - NETWORK NODE
          - HUB
          - HUB NODE
          - RELIABILITY REGION
          - EXT. NODE
          - RESERVE ZONE
          - SYSTEM
          - INT. AREA
          - EXT. AREA
          - DISPATCH ZONE
          - CAPACITY ZONE
          - DRRAZ
          - DRR AGGREGATION ZONE
        BidType:
          type: string
        BidId:
          type: integer
        Segments:
          $ref: '#/components/schemas/Segments'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_HbDayAheadDemandBid
    HbDayAheadDemandBids:
      type: object
      properties:
        HbDayAheadDemandBid:
          type: array
          items:
            $ref: '#/components/schemas/HbDayAheadDemandBid'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_HbDayAheadDemandBids
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: HTTP Basic Authentication over SSL. Credentials come from a free, self-serve ISO Express account; ISO New England states that ISO Express account holders are automatically granted access to the public data feeds. See https://www.iso-ne.com/participate/applications-status-changes/access-software-systems