Dynamic values in paramater

Hi jitpbi,

Perhaps you can try to split your url string and add optional parameters 'relative path' and 'query' to confirm if they works on power bi service side:

let
	url="http://175.20.9.16:41000/",
	Source = Web.Contents(url,
				[
					RelativePath="PS/v1/ABC/Device/Meter",
					Query =
					[
						start_time =
						DateTimeZone.ToText(DateTimeZone.From(Date.AddDays (DateTimeZone.UtcNow(),-3)),"yyyy-MM-ddThh:mm:ssZ"),
						end_time =
						DateTimeZone.ToText(DateTimeZone.UtcNow(),"yyyy-MM-ddThh:mm:ssZ")
					]
				]),
	Result=Json.Document(Source)
in
	Result

Using The RelativePath And Query Options With Web.Contents() In Power Query And Power BI M Code 
Regards,

Xiaoxin Sheng

I got the solution for this in my another post:

https://community.powerbi.com/t5/Desktop/Dynamic-values-in-paramater/m-p/1346168#M578929