Currently GDD calculation is linked to decomposition endpoint. It looks like below

GET https://fd-api-dev.ncsa.illinois.edu/covercrop/api/decomposition?termination_date=2021-05-05&biomass=772.63&cn_ratio=38.67&dw_dataset_id=71aa6802-4d2f-4a6a-a113-433b4700bd6b

Here the dw_dataset_id represents the weather files

We can create an independent endpoint that just uses two inputs: a) start date b) weather file dataset id, and outputs the GDD results. The format can be similar to the decomposition json.

[{"date": "2021-09-25", "GDD": 14.9}, {"date": "2021-09-26", "GDD": 24.1}, ...]

May be we can return the results for next 365 days, and frontend can decide which ones to display