ISO New England Fiveminutelmp API

openapi: 3.2.0
info:
  title: ISO New England Web Services API v1.1 Fiveminutelmp API
  version: '1.1'
  description: RESTful interface to ISO New England energy and market data.
  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: fiveminutelmp
  description: 14 path template(s) under /fiveminutelmp in the published ISO New England Web Services API v1.1 documentation.
paths:
  /fiveminutelmp:
    get:
      operationId: getFiveminutelmp
      summary: Default resource
      description: Default resource. Redirects to Five Minute LMP Info.
      tags:
      - fiveminutelmp
      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.fiveminutelmp.html
        harvested: '2026-07-27'
  /fiveminutelmp/current:
    get:
      operationId: getFiveminutelmpCurrent
      summary: Get the current Five Minute LMPs for Hub, Load Zones, and External Nodes
      description: Get the current Five Minute LMPs for Hub, Load Zones, and External Nodes.
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: a FiveMinuteLmpsElement containing the current Five Minute LMPs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
            application/json:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
              example:
                FiveMinLmps:
                  FiveMinLmp:
                  - LmpTotal: 68.04
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: 0.16
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4000'
                      '@LocType': HUB
                      $: .H.INTERNAL_HUB
                  - LmpTotal: 64.36
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: -3.52
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4001'
                      '@LocType': LOAD ZONE
                      $: .Z.MAINE
                  - LmpTotal: 67.85
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: -0.03
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4002'
                      '@LocType': LOAD ZONE
                      $: .Z.NEWHAMPSHIRE
                  - LmpTotal: 70.19
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: 2.31
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4003'
                      '@LocType': LOAD ZONE
                      $: .Z.VERMONT
                  - LmpTotal: 67.93
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: 0.05
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4004'
                      '@LocType': LOAD ZONE
                      $: .Z.CONNECTICUT
                  - LmpTotal: 67.32
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: -0.56
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4005'
                      '@LocType': LOAD ZONE
                      $: .Z.RHODEISLAND
                  - LmpTotal: 68.45
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: 0.57
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4006'
                      '@LocType': LOAD ZONE
                      $: .Z.SEMASS
                  - LmpTotal: 68.16
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: 0.28
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4007'
                      '@LocType': LOAD ZONE
                      $: .Z.WCMASS
                  - LmpTotal: 68.22
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: 0.34
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4008'
                      '@LocType': LOAD ZONE
                      $: .Z.NEMASSBOST
                  - LmpTotal: 63.68
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: -4.2
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4010'
                      '@LocType': EXT. NODE
                      $: .I.SALBRYNB345 1
                  - LmpTotal: 68.03
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: 0.15
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4011'
                      '@LocType': EXT. NODE
                      $: .I.ROSETON 345 1
                  - LmpTotal: 67.3
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: -0.58
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4012'
                      '@LocType': EXT. NODE
                      $: .I.HQ_P1_P2345 5
                  - LmpTotal: 71.64
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: 3.76
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4013'
                      '@LocType': EXT. NODE
                      $: .I.HQHIGATE120 2
                  - LmpTotal: 69.04
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: 1.16
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4014'
                      '@LocType': EXT. NODE
                      $: .I.SHOREHAM138 99
                  - LmpTotal: 68.53
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: 0.65
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4017'
                      '@LocType': EXT. NODE
                      $: .I.NRTHPORT138 5
                  - LmpTotal: 60.9
                    CongestionComponent: 0
                    EnergyComponent: 67.88
                    LossComponent: -6.98
                    BeginDate: '2026-07-27T17:25:00.000-04:00'
                    Location:
                      '@LocId': '4018'
                      '@LocType': EXT. NODE
                      $: .I.HQMRL_RD345 1
        '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.fiveminutelmp.current.html
        harvested: '2026-07-27'
      x-xml-element: FiveMinLmps
      x-example-evidence:
        source: https://www.iso-ne.com/ws/wsclient (public ISO Express dashboard proxy, anonymous POST)
        observed: '2026-07-27'
        note: Real response payload observed anonymously through the public dashboard proxy; the proxy envelope and its _url key were removed.
  /fiveminutelmp/current/all:
    get:
      operationId: getFiveminutelmpCurrentAll
      summary: Get the current Five Minute LMPs for all locations
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: a FiveMinuteLmpsElement containing the current Five Minute LMPs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
            application/json:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
        '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.fiveminutelmp.current.all.html
        harvested: '2026-07-27'
      x-xml-element: FiveMinLmps
  /fiveminutelmp/current/location/{locationId}:
    get:
      operationId: getFiveminutelmpCurrentLocationByLocationId
      summary: Get the current Five Minute LMPs for a given location
      description: Get the current Five Minute LMPs for a given location.
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: a LmpElement containing the current Five Minute LMP for the given location.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FiveMinLmp'
            application/json:
              schema:
                $ref: '#/components/schemas/FiveMinLmp'
        '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.fiveminutelmp.current.location.locationId.html
        harvested: '2026-07-27'
      x-xml-element: FiveMinLmp
      parameters:
      - name: locationId
        in: path
        required: true
        schema:
          type: string
        description: The location id
  /fiveminutelmp/current/locationType/{locationType}:
    get:
      operationId: getFiveminutelmpCurrentLocationTypeByLocationType
      summary: Get the current Five Minute LMPs for a given location type
      description: Get the current Five Minute LMPs for a given location type.
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: a FiveMinLmpsElement containing the current Five Minute LMP for the given location.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
            application/json:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
        '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.fiveminutelmp.current.locationType.locationType.html
        harvested: '2026-07-27'
      x-xml-element: FiveMinLmps
      parameters:
      - name: locationType
        in: path
        required: true
        schema:
          type: string
        description: The locationType (one of RESERVE ZONE, HUB, NETWORK NODE, RELIABILITY REGION, HUB NODE, SYSTEM, NETWORK AREA, LOAD ZONE)
  /fiveminutelmp/day/{day}/location/{locationId}:
    get:
      operationId: getFiveminutelmpDayByDayLocationByLocationId
      summary: Get an entire days Five Minute LMPs for a given location
      description: Get an entire days Five Minute LMPs for a given location. Only the past [?] days are supported.
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: a FiveMinuteLmpsElement containing the Five Minute LMPs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
            application/json:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
        '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.fiveminutelmp.day.day.location.locationId.html
        harvested: '2026-07-27'
      x-xml-element: FiveMinLmps
      parameters:
      - name: day
        in: path
        required: true
        schema:
          type: string
        description: The day to retrieve data for (YYYYMMDD)
      - name: locationId
        in: path
        required: true
        schema:
          type: string
        description: The location id
  /fiveminutelmp/info:
    get:
      operationId: getFiveminutelmpInfo
      summary: Get the Service Info for Five Minute LMPs
      description: Get the Service Info for Five Minute LMPs.
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: the ServiceInfoElement for Five Minute LMPs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/ServiceInfo'
            application/json:
              schema:
                $ref: '#/components/schemas/ServiceInfo'
              example:
                ServiceInfo:
                  CreationDate: '2026-07-27T17:25:25.000-04:00'
                  LatestBeginDate: '2026-07-27T17:25:00.000-04:00'
        '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.fiveminutelmp.info.html
        harvested: '2026-07-27'
      x-xml-element: ServiceInfo
      x-example-evidence:
        source: https://www.iso-ne.com/ws/wsclient (public ISO Express dashboard proxy, anonymous POST)
        observed: '2026-07-27'
        note: Real response payload observed anonymously through the public dashboard proxy; the proxy envelope and its _url key were removed.
  /fiveminutelmp/{Type}/current:
    get:
      operationId: getFiveminutelmpByTypeCurrent
      summary: Get the current Five Minute LMPs for Hub, Load Zones, and External Nodes
      description: Get the current Five Minute LMPs for Hub, Load Zones, and External Nodes.
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: a FiveMinuteLmpsElement containing the current Five Minute LMPs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
            application/json:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
        '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.fiveminutelmp.Type.current.html
        harvested: '2026-07-27'
      x-xml-element: FiveMinLmps
      parameters:
      - name: Type
        in: path
        required: true
        schema:
          type: string
  /fiveminutelmp/{Type}/current/all:
    get:
      operationId: getFiveminutelmpByTypeCurrentAll
      summary: Get the current Five Minute LMPs for all locations
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: a FiveMinuteLmpsElement containing the current Five Minute LMPs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
            application/json:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
        '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.fiveminutelmp.Type.current.all.html
        harvested: '2026-07-27'
      x-xml-element: FiveMinLmps
      parameters:
      - name: Type
        in: path
        required: true
        schema:
          type: string
  /fiveminutelmp/{Type}/current/location/{locationId}:
    get:
      operationId: getFiveminutelmpByTypeCurrentLocationByLocationId
      summary: Get the current Five Minute LMPs for a given location
      description: Get the current Five Minute LMPs for a given location.
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: a LmpElement containing the current Five Minute LMP for the given location.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
            application/json:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
        '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.fiveminutelmp.Type.current.location.locationId.html
        harvested: '2026-07-27'
      x-xml-element: FiveMinLmps
      parameters:
      - name: Type
        in: path
        required: true
        schema:
          type: string
      - name: locationId
        in: path
        required: true
        schema:
          type: string
        description: The location id
  /fiveminutelmp/{Type}/current/locationType/{locationType}:
    get:
      operationId: getFiveminutelmpByTypeCurrentLocationTypeByLocationType
      summary: Get the current Five Minute LMPs for a given location type
      description: Get the current Five Minute LMPs for a given location type.
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: a FiveMinLmpsElement containing the current Five Minute LMP for the given location.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
            application/json:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
        '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.fiveminutelmp.Type.current.locationType.locationType.html
        harvested: '2026-07-27'
      x-xml-element: FiveMinLmps
      parameters:
      - name: Type
        in: path
        required: true
        schema:
          type: string
      - name: locationType
        in: path
        required: true
        schema:
          type: string
        description: The locationType (one of RESERVE ZONE, HUB, NETWORK NODE, RELIABILITY REGION, HUB NODE, SYSTEM, NETWORK AREA, LOAD ZONE)
  /fiveminutelmp/{Type}/day/{day}/location/{locationId}:
    get:
      operationId: getFiveminutelmpByTypeDayByDayLocationByLocationId
      summary: Get an entire days Five Minute LMPs for a given location
      description: Get an entire days Five Minute LMPs for a given location. Only the past [?] days are supported.
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: a FiveMinuteLmpsElement containing the Five Minute LMPs.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
            application/json:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
        '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.fiveminutelmp.Type.day.day.location.locationId.html
        harvested: '2026-07-27'
      x-xml-element: FiveMinLmps
      parameters:
      - name: Type
        in: path
        required: true
        schema:
          type: string
      - name: day
        in: path
        required: true
        schema:
          type: string
        description: The day to retrieve data for (YYYYMMDD)
      - name: locationId
        in: path
        required: true
        schema:
          type: string
        description: The location id
  /fiveminutelmp/{Type}/day/{day}/starthour/{sh}:
    get:
      operationId: getFiveminutelmpByTypeDayByDayStarthourBySh
      summary: GET /fiveminutelmp/{Type}/day/{day}/starthour/{sh}
      description: (no documentation provided)
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: Successful response.
          content:
            application/xml:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
            application/json:
              schema:
                $ref: '#/components/schemas/FiveMinLmps'
        '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.fiveminutelmp.Type.day.day.starthour.sh.html
        harvested: '2026-07-27'
      x-xml-element: FiveMinLmps
      parameters:
      - name: Type
        in: path
        required: true
        schema:
          type: string
      - name: day
        in: path
        required: true
        schema:
          type: string
      - name: sh
        in: path
        required: true
        schema:
          type: string
  /fiveminutelmp/{Type}/info:
    get:
      operationId: getFiveminutelmpByTypeInfo
      summary: Get the Service Info for Five Minute LMPs
      description: Get the Service Info for Five Minute LMPs.
      tags:
      - fiveminutelmp
      responses:
        '200':
          description: the ServiceInfoElement for Five Minute LMPs.
          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.fiveminutelmp.Type.info.html
        harvested: '2026-07-27'
      x-xml-element: ServiceInfo
      parameters:
      - name: Type
        in: path
        required: true
        schema:
          type: string
components:
  schemas:
    Lmp:
      type: object
      properties:
        BeginDate:
          type: string
          format: date-time
        Location:
          $ref: '#/components/schemas/LocationRef'
        LmpTotal:
          type: number
        EnergyComponent:
          type: number
        CongestionComponent:
          type: number
        LossComponent:
          type: number
      required:
      - BeginDate
      - Location
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_Lmp
    LocationRef:
      type: object
      properties:
        $:
          type: string
          description: Element text value (serialized as "$" in the JSON representation, per observed API responses).
        '@LocId':
          type: integer
        '@LocType':
          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
      required:
      - '@LocId'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_LocationRef
    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
    FiveMinLmp:
      $ref: '#/components/schemas/Lmp'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_FiveMinLmp
    FiveMinLmps:
      type: object
      properties:
        FiveMinLmp:
          type: array
          items:
            $ref: '#/components/schemas/Lmp'
      x-xsd-source: schemas/iso-new-england-web-services-ns0.xsd#type_FiveMinLmps
  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