WattTime · JSON Structure

Watttime Forecast Response Structure

ForecastResponse schema from WattTime API

Type: object Properties: 2

EmissionsClimateCarbonEnergyElectricity GridSustainabilityClean Energy

ForecastResponse is a JSON Structure definition published by WattTime, describing 2 properties. It conforms to the https://json-structure.org/meta/core/v0/# meta-schema.

Properties

meta data

Meta-schema: https://json-structure.org/meta/core/v0/#

JSON Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/watttime/refs/heads/main/json-structure/watttime-forecast-response-structure.json",
  "name": "ForecastResponse",
  "description": "ForecastResponse schema from WattTime API",
  "type": "object",
  "properties": {
    "meta": {
      "type": "object",
      "properties": {
        "region": {
          "type": "string",
          "description": "Grid region identifier.",
          "example": "CAISO_NORTH"
        },
        "signal_type": {
          "type": "string",
          "description": "Signal type of the forecast.",
          "example": "co2_moer"
        },
        "model": {
          "type": "object",
          "properties": {
            "date": {
              "type": "string",
              "description": "Model version date.",
              "example": "2026-03-01"
            }
          }
        },
        "units": {
          "type": "string",
          "description": "Units for the forecast values.",
          "example": "lbs_co2_per_mwh"
        },
        "generated_at": {
          "type": "datetime",
          "description": "Timestamp when the forecast was generated.",
          "example": "2026-05-03T10:00:00+00:00"
        }
      }
    },
    "data": {
      "type": "array",
      "description": "Array of forecast data points.",
      "items": {
        "type": "object",
        "properties": {
          "point_time": {
            "type": "datetime",
            "description": "Timestamp for the emissions data point (ISO 8601 UTC).",
            "example": "2026-04-01T00:00:00+00:00"
          },
          "value": {
            "type": "double",
            "format": "double",
            "description": "Emissions value in the units specified by the response meta.",
            "example": 412.5
          },
          "version": {
            "type": "string",
            "description": "Model version used for this data point.",
            "example": "2026-03-01"
          }
        }
      }
    }
  }
}

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