openapi: 3.2.0
info:
  title: ISO New England Web Services API v1.1 Drtp 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: drtp
  description: 5 path template(s) under /drtp in the published ISO New England Web Services API v1.1 documentation.
paths:
  /drtp:
    get:
      operationId: getDrtp
      summary: Default resource
      description: Default resource. Redirects to DRTP.
      tags:
      - drtp
      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.drtp.html
        harvested: '2026-07-27'
  /drtp/current:
    get:
      operationId: getDrtpCurrent
      summary: Get the current DRTP
      description: Get the current DRTP.
      tags:
      - drtp
      responses:
        '200':
          description: a DrtpResultsElement containing the current DRTPs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/DrtpResults'
            application/json:
              schema:
                $ref: '#/components/schemas/DrtpResults'
        '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.drtp.current.html
        harvested: '2026-07-27'
      x-xml-element: DrtpResults
  /drtp/day/{day}:
    get:
      operationId: getDrtpDayByDay
      summary: Get an entire Month DRTPs
      description: Get an entire Month DRTPs.
      tags:
      - drtp
      responses:
        '200':
          description: a DrtpResultsElement containing the DRTPs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/DrtpResults'
            application/json:
              schema:
                $ref: '#/components/schemas/DrtpResults'
        '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.drtp.day.day.html
        harvested: '2026-07-27'
      x-xml-element: DrtpResults
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
        description: Retrieve data for the entire month that the day is in(YYYYMMDD)
  /drtp/detail/day/{day}:
    get:
      operationId: getDrtpDetailDayByDay
      summary: Get an entire Month Supply CurvePairs
      description: Get an entire Month Supply CurvePairs.
      tags:
      - drtp
      responses:
        '200':
          description: a SupplyCurvePairsElement containing the DRTPs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/SupplyCurvePairs'
            application/json:
              schema:
                $ref: '#/components/schemas/SupplyCurvePairs'
        '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.drtp.detail.day.day.html
        harvested: '2026-07-27'
      x-xml-element: SupplyCurvePairs
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
        description: Retrieve data for the entire month that the day is in (YYYYMMDD)
  /drtp/info:
    get:
      operationId: getDrtpInfo
      summary: Get the Service Info for Drtp
      description: Get the Service Info for Drtp.
      tags:
      - drtp
      responses:
        '200':
          description: the ServiceInfoElement for DRTP.
          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.drtp.info.html
        harvested: '2026-07-27'
      x-xml-element: ServiceInfo
components:
  schemas:
    DrtpResults:
      type: object
      properties:
        DrtpResult:
          type: array
          items:
            $ref: '#/components/schemas/DrtpResult'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_DrtpResults
    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
    SupplyCurvePairs:
      type: object
      properties:
        SupplyCurvePair:
          type: array
          items:
            $ref: '#/components/schemas/SupplyCurvePair'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_SupplyCurvePairs
    DrtpResult:
      type: object
      properties:
        BeginDate:
          type: string
          format: date-time
        CaseId:
          type: integer
        HistoricalThresholdPrice:
          type: number
        DemandReductionThresholdPrice:
          type: number
        RegressionCoefficientA:
          type: number
        RegressionCoefficientB:
          type: number
        RegressionCoefficientC:
          type: number
        Rsquare:
          type: number
        TradingMonth:
          type: string
          format: date-time
        ReferenceMonth:
          type: string
          format: date-time
        FuelIndexTradingMonth:
          type: number
        FuelIndexReferenceMonth:
          type: number
        PricePointLowerThreshold:
          type: number
        PricePointUpperThreshold:
          type: number
        AdjustedOfferCapacity:
          type: number
      required:
      - BeginDate
      - CaseId
      - RegressionCoefficientA
      - RegressionCoefficientB
      - RegressionCoefficientC
      - Rsquare
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_DrtpResult
    SupplyCurvePair:
      type: object
      properties:
        BeginDate:
          type: string
          format: date-time
        CumulativeSupplyMw:
          type: number
        OfferPrice:
          type: number
        TradingMonth:
          type: string
          format: date-time
        ReferenceMonth:
          type: string
          format: date-time
      required:
      - BeginDate
      - CumulativeSupplyMw
      - OfferPrice
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_SupplyCurvePair
  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