Summary
The Go SDK method GetEmissionsDataForLocationByTime sends startTime and endTime as query parameters to /emissions/bylocation, but the Carbon Aware SDK server ignores them and always returns the most recent real-time measurement regardless of the requested window.
Steps to reproduce
# Request data for yesterday
curl "http://localhost:7031/emissions/bylocation?location=westus&startTime=2026-04-22T16:00:00Z&endTime=2026-04-22T17:00:00Z"
Response returns data timestamped now, not for the requested range:
[{"location": "CAISO_NORTH", "time": "2026-04-23T16:10:00+00:00", "rating": 0, "duration": "00:05:00"}]Impact
Makes historical backfill via the SDK impossible. Any fallback or gap-filling logic that relies on this endpoint for past data will silently receive current (possibly also broken) data instead. A direct call to the provider API is required as a workaround.
Confirmed on Carbon Aware SDK v1.8.0 with WattTime as data source.
Summary
The Go SDK method
GetEmissionsDataForLocationByTimesendsstartTimeandendTimeas query parameters to/emissions/bylocation, but the Carbon Aware SDK server ignores them and always returns the most recent real-time measurement regardless of the requested window.Steps to reproduce
Response returns data timestamped now, not for the requested range:
[{"location": "CAISO_NORTH", "time": "2026-04-23T16:10:00+00:00", "rating": 0, "duration": "00:05:00"}]Impact
Makes historical backfill via the SDK impossible. Any fallback or gap-filling logic that relies on this endpoint for past data will silently receive current (possibly also broken) data instead. A direct call to the provider API is required as a workaround.
Confirmed on Carbon Aware SDK v1.8.0 with WattTime as data source.