ISO New England

ISO New England Fcmmra API

4 path template(s) under /fcmmra in the published ISO New England Web Services API v1.1 documentation.

GitHub OpenAPI
Business capability
Capacity Market Participation BC-3850.40

Operations 4

GET /fcmmra/cp/{cp} GET /fcmmra/cp/{cp} #
GET /fcmmra/cp/{cp}/month/{month} GET /fcmmra/cp/{cp}/month/{month} #
GET /fcmmra/current GET /fcmmra/current #
GET /fcmmra/info GET /fcmmra/info #

Documentation

📖
APIReference
https://webservices.iso-ne.com/docs/v1.1/
📖
Documentation
https://www.iso-ne.com/participate/support/web-services-data
📖
Documentation
https://www.iso-ne.com/participate/applications-status-changes/access-software-systems
📖
Documentation
https://www.iso-ne.com/static-assets/documents/2017/06/webservices_documentation.xlsx

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/openapi/iso-new-england-fcmmra-api-openapi.yml

Schemas & Data

📊
JSONSchema
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/json-schema/iso-new-england-web-services-schemas.json

Other Resources

🔗
SignUp
https://www.iso-ne.com/signup
🔗
Portal
https://www.iso-ne.com/isoexpress/
🔗
XMLSchema
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/schemas/iso-new-england-web-services-ns0.xsd
🔗
XMLSchema
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/schemas/iso-new-england-web-services-ns1.xsd
🔗
XMLSchema
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/schemas/nextt-web-services.xsd
🔗
Examples
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/examples/_index.yml
🔗
DataModel
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/data-model/iso-new-england-data-model.yml
🔗
ErrorCatalog
https://raw.githubusercontent.com/api-evangelist/iso-new-england/refs/heads/main/errors/iso-new-england-problem-types.yml
🔗
WADL
https://webservices.iso-ne.com/api/v1.1?_wadl&_type=xml

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/iso-new-england-fcmmra-api"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

iso-new-england-fcmmra-api-openapi.yml Raw ↑ 
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.
  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:
    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
    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
    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
    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
    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
    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
    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
    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
    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
    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
    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