openapi: 3.2.0 info: title: ISO New England Web Services API v1.1 Hbforwardreserveauctionoffer 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: hbforwardreserveauctionoffer description: 3 path template(s) under /hbforwardreserveauctionoffer in the published ISO New England Web Services API v1.1 documentation. paths: /hbforwardreserveauctionoffer: get: operationId: getHbforwardreserveauctionoffer summary: Default resource description: Default resource. Redirects to HbForwardReserveAuctionOfferInfo. tags: - hbforwardreserveauctionoffer 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.hbforwardreserveauctionoffer.html harvested: '2026-07-27' /hbforwardreserveauctionoffer/info: get: operationId: getHbforwardreserveauctionofferInfo summary: Get the Service Info for HbForwardReserveAuctionOffer description: Get the Service Info for HbForwardReserveAuctionOffer. tags: - hbforwardreserveauctionoffer responses: '200': description: the ServiceInfoElement for HbForwardReserveAuctionOffer 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.hbforwardreserveauctionoffer.info.html harvested: '2026-07-27' x-xml-element: ServiceInfo /hbforwardreserveauctionoffer/season/{month}: get: operationId: getHbforwardreserveauctionofferSeasonByMonth summary: Get an entire months HbForwardReserveAuctionOffer description: Get an entire months HbForwardReserveAuctionOffer. tags: - hbforwardreserveauctionoffer responses: '200': description: a containing the HbForwardReserveAuctionOffers for the season. content: application/xml: schema: $ref: '#/components/schemas/HbForwardReserveAuctionOffers' application/json: schema: $ref: '#/components/schemas/HbForwardReserveAuctionOffers' '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.hbforwardreserveauctionoffer.season.month.html harvested: '2026-07-27' x-xml-element: HbForwardReserveAuctionOffers parameters: - name: month in: path required: true schema: type: string description: The month to retrieve data for (YYYYMM) for a season components: schemas: HbForwardReserveAuctionOffer: type: object properties: BeginDate: type: string format: date-time MaskedCustomerId: type: integer ReserveZone: $ref: '#/components/schemas/ReserveLocRef' ProductType: type: string Segments: $ref: '#/components/schemas/Segments' required: - BeginDate x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_HbForwardReserveAuctionOffer 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 ReserveLocRef: type: object properties: $: type: string description: Element text value (serialized as "$" in the JSON representation, per observed API responses). '@LocId': type: integer required: - '@LocId' x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_ReserveLocRef HbForwardReserveAuctionOffers: type: object properties: HbForwardReserveAuctionOffer: type: array items: $ref: '#/components/schemas/HbForwardReserveAuctionOffer' x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_HbForwardReserveAuctionOffers 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