WattTime API
The WattTime Data API v3 provides access to real-time, forecast, and historical marginal emissions data for electric grids worldwide. Key signals include CO2 MOER (Marginal Operating Emissions Rate), health damage estimates, and CO2 AOER (Average Operating Emissions Rate). The API covers 342 grid regions in 210 countries and territories, with real-time data updated every five minutes via the forecast endpoint.
Documentation
Specifications
Schemas & Data
JSONSchema
json-schema/watttime-data-point-schema.json
JSONSchema
json-schema/watttime-data-response-schema.json
JSONSchema
json-schema/watttime-forecast-response-schema.json
JSONSchema
json-schema/watttime-region-response-schema.json
JSONStructure
json-structure/watttime-data-point-structure.json
JSONStructure
json-structure/watttime-data-response-structure.json
OpenAPI
#Emissions
#Carbon
#Electricity Grid
#Marginal Emissions
#Forecasting
#Climate