Extraction of activities of the day

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Dear, I appreciate your help, we are designing a control panel to visualize in neal real time the status of scheduled activities on the day, however we have not been able to identify an API that allows us to extract all the information in question, for which I will appreciate can tell me if there is any method that is not the Data Warehouse service, since this only extracts the previous day and not the day, since thank you very much and I hope you can help me
regards