openapi: 3.2.0
info:
  title: ISO New England Web Services API v1.1 Hourlyrcp 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: hourlyrcp
  description: 8 path template(s) under /hourlyrcp in the published ISO New England Web Services API v1.1 documentation.
paths:
  /hourlyrcp/final:
    get:
      operationId: getHourlyrcpFinal
      summary: Default resource
      description: Default resource. Redirects to Hourly Final Regulation Clearing Prices(RCPs).
      tags:
      - hourlyrcp
      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.hourlyrcp.final.html
        harvested: '2026-07-27'
  /hourlyrcp/final/current:
    get:
      operationId: getHourlyrcpFinalCurrent
      summary: Get the current Hourly Final Rcp
      description: Get the current Hourly Final Rcp.
      tags:
      - hourlyrcp
      responses:
        '200':
          description: a HourlyRcpsElement containing the current Hourly Final Regulation Clearing Prices(RCPs).
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/HourlyRcps'
            application/json:
              schema:
                $ref: '#/components/schemas/HourlyRcps'
        '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.hourlyrcp.final.current.html
        harvested: '2026-07-27'
      x-xml-element: HourlyRcps
  /hourlyrcp/final/day/{day}:
    get:
      operationId: getHourlyrcpFinalDayByDay
      summary: Get an entire days HourlyPrelim RCP Only the past [?] days are supported
      description: Get an entire days HourlyPrelim RCP Only the past [?] days are supported.
      tags:
      - hourlyrcp
      responses:
        '200':
          description: a HourlyRcpsElement containing the Hourly Final Regulation Clearing Prices(RCPs).
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/HourlyRcps'
            application/json:
              schema:
                $ref: '#/components/schemas/HourlyRcps'
        '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.hourlyrcp.final.day.day.html
        harvested: '2026-07-27'
      x-xml-element: HourlyRcps
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
        description: The day to retrieve data for (YYYYMMDD)
  /hourlyrcp/final/info:
    get:
      operationId: getHourlyrcpFinalInfo
      summary: Get the Service Info for Hourly Final Regulation Clearing Prices(RCPs)
      description: Get the Service Info for Hourly Final Regulation Clearing Prices(RCPs).
      tags:
      - hourlyrcp
      responses:
        '200':
          description: the ServiceInfoElement for Hourly Final Reserve Price.
          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.hourlyrcp.final.info.html
        harvested: '2026-07-27'
      x-xml-element: ServiceInfo
  /hourlyrcp/prelim:
    get:
      operationId: getHourlyrcpPrelim
      summary: Default resource
      description: Default resource. Redirects to Hourly Prelim Regulation Clearing Prices(RCPs).
      tags:
      - hourlyrcp
      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.hourlyrcp.prelim.html
        harvested: '2026-07-27'
  /hourlyrcp/prelim/current:
    get:
      operationId: getHourlyrcpPrelimCurrent
      summary: Get the current Hourly Prelim Rcp
      description: Get the current Hourly Prelim Rcp.
      tags:
      - hourlyrcp
      responses:
        '200':
          description: a HourlyRcpsElement containing the current Hourly Prelim Regulation Clearing Prices(RCPs).
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/HourlyRcps'
            application/json:
              schema:
                $ref: '#/components/schemas/HourlyRcps'
        '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.hourlyrcp.prelim.current.html
        harvested: '2026-07-27'
      x-xml-element: HourlyRcps
  /hourlyrcp/prelim/day/{day}:
    get:
      operationId: getHourlyrcpPrelimDayByDay
      summary: Get an entire days HourlyPrelim RCP Only the past [?] days are supported
      description: Get an entire days HourlyPrelim RCP Only the past [?] days are supported.
      tags:
      - hourlyrcp
      responses:
        '200':
          description: a HourlyRcpsElement containing the Hourly Prelim Regulation Clearing Prices(RCPs).
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/HourlyRcps'
            application/json:
              schema:
                $ref: '#/components/schemas/HourlyRcps'
        '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.hourlyrcp.prelim.day.day.html
        harvested: '2026-07-27'
      x-xml-element: HourlyRcps
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
        description: The day to retrieve data for (YYYYMMDD)
  /hourlyrcp/prelim/info:
    get:
      operationId: getHourlyrcpPrelimInfo
      summary: Get the Service Info for Hourly Prelim Regulation Clearing Prices(RCPs)
      description: Get the Service Info for Hourly Prelim Regulation Clearing Prices(RCPs).
      tags:
      - hourlyrcp
      responses:
        '200':
          description: the ServiceInfoElement for Hourly Prelim Reserve Price.
          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.hourlyrcp.prelim.info.html
        harvested: '2026-07-27'
      x-xml-element: ServiceInfo
components:
  schemas:
    HourlyRcps:
      type: object
      properties:
        HourlyRcp:
          type: array
          items:
            $ref: '#/components/schemas/HourlyRcp'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_HourlyRcps
    HourlyRcp:
      $ref: '#/components/schemas/Rcp'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_HourlyRcp
    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
    Rcp:
      type: object
      properties:
        BeginDate:
          type: string
          format: date-time
        RegClearingPrice:
          type: number
        RegServiceClearingPrice:
          type: number
        RegCapacityClearingPrice:
          type: number
        HourEnd:
          type: string
      required:
      - BeginDate
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_Rcp
  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