WattTime API — Emissions Data

naftiko: 1.0.0-alpha2
info:
  label: WattTime API — Emissions Data
  description: 'WattTime API — Emissions Data. 2 operations. Lead operation: WattTime Get Historical Emissions Data. Self-contained
    Naftiko capability covering one Watttime business surface.'
  tags:
  - Watttime
  - Emissions Data
  created: '2026-05-19'
  modified: '2026-05-19'
binds:
- namespace: env
  keys:
    WATTTIME_API_KEY: WATTTIME_API_KEY
capability:
  consumes:
  - type: http
    namespace: watttime-emissions-data
    baseUri: https://api.watttime.org/v3
    description: WattTime API — Emissions Data business capability. Self-contained, no shared references.
    resources:
    - name: data
      path: /data
      operations:
      - name: gethistoricaldata
        method: GET
        description: WattTime Get Historical Emissions Data
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
        inputParameters:
        - name: region
          in: query
          type: string
          description: Grid region identifier (e.g., CAISO_NORTH). Obtain from /region-from-loc or /my-access.
          required: true
        - name: signal_type
          in: query
          type: string
          description: 'The emissions signal type to retrieve. Valid values: co2_moer, co2_aoer, health_damage.'
          required: true
        - name: start
          in: query
          type: string
          description: Start of the time window in ISO 8601 format (UTC). Maximum window is 32 days.
          required: true
        - name: end
          in: query
          type: string
          description: End of the time window in ISO 8601 format (UTC).
          required: true
        - name: model
          in: query
          type: string
          description: Model version date to use (e.g., 2026-03-01). Defaults to the latest available model for the region.
    - name: historical
      path: /historical
      operations:
      - name: downloadhistoricaldata
        method: GET
        description: WattTime Download Historical Emissions CSV
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
        inputParameters:
        - name: region
          in: query
          type: string
          description: Grid region identifier (e.g., CAISO_NORTH).
          required: true
        - name: signal_type
          in: query
          type: string
          description: The emissions signal type.
          required: true
        - name: start
          in: query
          type: string
          description: Start date for historical data download (YYYY-MM-DD).
        - name: end
          in: query
          type: string
          description: End date for historical data download (YYYY-MM-DD).
        - name: model
          in: query
          type: string
          description: Model version date.
    authentication:
      type: bearer
      token: '{{env.WATTTIME_API_KEY}}'
  exposes:
  - type: rest
    namespace: watttime-emissions-data-rest
    port: 8080
    description: REST adapter for WattTime API — Emissions Data. One Spectral-compliant resource per consumed operation, prefixed
      with /v1.
    resources:
    - path: /v1/data
      name: data
      description: REST surface for data.
      operations:
      - method: GET
        name: gethistoricaldata
        description: WattTime Get Historical Emissions Data
        call: watttime-emissions-data.gethistoricaldata
        with:
          region: rest.region
          signal_type: rest.signal_type
          start: rest.start
          end: rest.end
          model: rest.model
        outputParameters:
        - type: object
          mapping: $.
    - path: /v1/historical
      name: historical
      description: REST surface for historical.
      operations:
      - method: GET
        name: downloadhistoricaldata
        description: WattTime Download Historical Emissions CSV
        call: watttime-emissions-data.downloadhistoricaldata
        with:
          region: rest.region
          signal_type: rest.signal_type
          start: rest.start
          end: rest.end
          model: rest.model
        outputParameters:
        - type: object
          mapping: $.
  - type: mcp
    namespace: watttime-emissions-data-mcp
    port: 9090
    transport: http
    description: MCP adapter for WattTime API — Emissions Data. One tool per consumed operation, routed inline through this
      capability's consumes block.
    tools:
    - name: watttime-get-historical-emissions-data
      description: WattTime Get Historical Emissions Data
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: watttime-emissions-data.gethistoricaldata
      with:
        region: tools.region
        signal_type: tools.signal_type
        start: tools.start
        end: tools.end
        model: tools.model
      outputParameters:
      - type: object
        mapping: $.
    - name: watttime-download-historical-emissions-csv
      description: WattTime Download Historical Emissions CSV
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: watttime-emissions-data.downloadhistoricaldata
      with:
        region: tools.region
        signal_type: tools.signal_type
        start: tools.start
        end: tools.end
        model: tools.model
      outputParameters:
      - type: object
        mapping: $.