openapi: 3.2.0
info:
  title: ISO New England Web Services API v1.1 Fcmmra 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: fcmmra
  description: 4 path template(s) under /fcmmra in the published ISO New England Web Services API v1.1 documentation.
paths:
  /fcmmra/cp/{cp}:
    get:
      operationId: getFcmmraCpByCp
      summary: GET /fcmmra/cp/{cp}
      description: (no documentation provided)
      tags:
      - fcmmra
      responses:
        '200':
          description: Successful response.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FCMRAResults'
            application/json:
              schema:
                $ref: '#/components/schemas/FCMRAResults'
        '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.fcmmra.cp.cp.html
        harvested: '2026-07-27'
      x-xml-element: FCMRAResults
      parameters:
      - name: cp
        in: path
        required: true
        schema:
          type: string
  /fcmmra/cp/{cp}/month/{month}:
    get:
      operationId: getFcmmraCpByCpMonthByMonth
      summary: GET /fcmmra/cp/{cp}/month/{month}
      description: (no documentation provided)
      tags:
      - fcmmra
      responses:
        '200':
          description: Successful response.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FCMRAResults'
            application/json:
              schema:
                $ref: '#/components/schemas/FCMRAResults'
        '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.fcmmra.cp.cp.month.month.html
        harvested: '2026-07-27'
      x-xml-element: FCMRAResults
      parameters:
      - name: cp
        in: path
        required: true
        schema:
          type: string
      - name: month
        in: path
        required: true
        schema:
          type: string
  /fcmmra/current:
    get:
      operationId: getFcmmraCurrent
      summary: GET /fcmmra/current
      description: (no documentation provided)
      tags:
      - fcmmra
      responses:
        '200':
          description: Successful response.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FCMRAResults'
            application/json:
              schema:
                $ref: '#/components/schemas/FCMRAResults'
        '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.fcmmra.current.html
        harvested: '2026-07-27'
      x-xml-element: FCMRAResults
  /fcmmra/info:
    get:
      operationId: getFcmmraInfo
      summary: GET /fcmmra/info
      description: (no documentation provided)
      tags:
      - fcmmra
      responses:
        '200':
          description: Successful response.
          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.fcmmra.info.html
        harvested: '2026-07-27'
      x-xml-element: ServiceInfo
components:
  schemas:
    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
    ClearedCapacityZone:
      type: object
      properties:
        CapacityZoneID:
          type: integer
        CapacityZoneType:
          type: string
        CapacityZoneName:
          type: string
        SupplySubmitted:
          type: number
        DemandSubmitted:
          type: number
        SupplyCleared:
          type: number
        DemandCleared:
          type: number
        NetCapacityCleared:
          type: number
        ISOSupplySubmitted:
          type: number
        ISOSupplyCleared:
          type: number
        ISODemandSubmitted:
          type: number
        ISODemandCleared:
          type: number
        ClearingPrice:
          type: number
        ClearedExternalInterfaces:
          $ref: '#/components/schemas/ClearedInterfaces'
      required:
      - CapacityZoneID
      - CapacityZoneName
      - SupplySubmitted
      - DemandSubmitted
      - SupplyCleared
      - DemandCleared
      - NetCapacityCleared
      - ClearingPrice
      - ClearedExternalInterfaces
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_ClearedCapacityZone
    ClearedInterface:
      type: object
      properties:
        ExternalInterfaceId:
          type: integer
        ExternalInterfaceName:
          type: string
        SupplySubmitted:
          type: number
        DemandSubmitted:
          type: number
        SupplyCleared:
          type: number
        DemandCleared:
          type: number
        NetCapacityCleared:
          type: number
        ISOSupplySubmitted:
          type: number
        ISOSupplyCleared:
          type: number
        ClearingPrice:
          type: number
      required:
      - ExternalInterfaceId
      - ExternalInterfaceName
      - SupplySubmitted
      - DemandSubmitted
      - SupplyCleared
      - DemandCleared
      - NetCapacityCleared
      - ClearingPrice
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_ClearedInterface
    Period:
      type: object
      properties:
        Id:
          type: integer
        Description:
          type: string
        Type:
          type: string
        BeginDate:
          type: string
          format: date-time
        EndDate:
          type: string
          format: date-time
        ParentId:
          type: integer
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_Period
    SystemDemandCurveResults:
      type: object
      properties:
        SubmittedRepresentativeCsoMw:
          type: number
        SubmittedSdcMw:
          type: number
        ClearedRepresentativeCsoMw:
          type: number
        ClearedSdcMw:
          type: number
        ClearedNetCapacityMw:
          type: number
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_SystemDemandCurveResults
    ClearedCapacityZones:
      type: object
      properties:
        ClearedCapacityZone:
          type: array
          items:
            $ref: '#/components/schemas/ClearedCapacityZone'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_ClearedCapacityZones
    Auction:
      type: object
      properties:
        Id:
          type: integer
        Description:
          type: string
        ApprovalDate:
          type: string
          format: date-time
        AuctionBeginDate:
          type: string
          format: date-time
        Type:
          type: string
        CommitmentPeriod:
          $ref: '#/components/schemas/Period'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_Auction
    ISOParticipation:
      type: object
      properties:
        ISOSupplySubmitted:
          type: number
        ISODemandSubmitted:
          type: number
        ISOSupplyCleared:
          type: number
        ISODemandCleared:
          type: number
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_ISOParticipation
    FCMRAResults:
      type: object
      properties:
        FCMRAResult:
          type: array
          items:
            $ref: '#/components/schemas/FCMRAResult'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_FCMRAResults
    ClearedInterfaces:
      type: object
      properties:
        ClearedExternalInterface:
          type: array
          items:
            $ref: '#/components/schemas/ClearedInterface'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_ClearedInterfaces
    SystemResults:
      type: object
      properties:
        SupplySubmitted:
          type: number
        SupplyCleared:
          type: number
        DemandSubmitted:
          type: number
        DemandCleared:
          type: number
        NetCapacityCleared:
          type: number
      required:
      - SupplySubmitted
      - SupplyCleared
      - DemandSubmitted
      - DemandCleared
      - NetCapacityCleared
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_SystemResults
    FCMRAResult:
      type: object
      properties:
        Auction:
          $ref: '#/components/schemas/Auction'
        ClearedCapacityZones:
          $ref: '#/components/schemas/ClearedCapacityZones'
        SystemResults:
          $ref: '#/components/schemas/SystemResults'
        ISOAuctionParticipation:
          $ref: '#/components/schemas/ISOParticipation'
        SystemDemandCurveResults:
          $ref: '#/components/schemas/SystemDemandCurveResults'
      required:
      - Auction
      - ClearedCapacityZones
      - SystemResults
      - ISOAuctionParticipation
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_FCMRAResult
  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