{"exchange":"NFO","symboltoken":"35006","interval":"THREE_MINUTE","fromdate":"2025-01-01T09:25:00","todate":"2025-01-01T10:25:00"}
using URL - string URL = APIURL + "/rest/secure/angelbroking/historical/v1/getOIData";

Message - Invalida date or time format
error code AB13000

tried all possible ways to send date time
//string fromdate = "2025-01-01 09:25";
//string todate = "2025-01-01 10:25";
//string date_time_format = "yyyy-MM-dd HH:mm";

        string fromdate = "2025-01-01 09:25";
        string todate = "2025-01-01 10:25";
        string date_time_format = "yyyy-MM-dd hh:mm";

        DateTime datetime_fromdate = DateTime.ParseExact(fromdate, date_time_format, CultureInfo.InvariantCulture);
        DateTime datetime_todate = DateTime.ParseExact(todate, date_time_format, CultureInfo.InvariantCulture);

        // Create a DateTime object from the string

////DateTime datetime_fromdate = DateTime.ParseExact(fromdate, date_time_format, null);
////DateTime datetime_todate = DateTime.ParseExact(todate, date_time_format, null);

I'm also getting Login failed error

@Moderator_2 Again Instruments downloading function is not able to download file using C#.
Request you to check at your end and let us know if any issue?

@admin
Are you able to Fix issue? If this is so how can we trust Angel API and make trading??

API was down again today and My program tried to get LTP and failed. Also it tried to login API gives NULL response. If this would be the case how can we trust and trade using API???

@yash12392
Yes, It happened again and was worrying about my code and tried multiple times login. No luck and this isn't expected from No1 Broker in India