Date Time modification in response

[Akshit koul]

Hi ALl

We have a request which has a date argument 

eg  DateTime = 2026-04-22T05:15:05Z

And response , we want to use this date and send in a 3 days advance date

{
"responseDateTime" : "2026-04-25T05:15:05Z"

}

Thanks

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[Akshit koul]

Can we use a script or a step in vsm? , can someone help with the steps. Thanks

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[Premalatha Gadde]

Hi Akshit,

You can use Magic dates, to achieve the functionality you are looking. 

You said, the request has "DateTime = 2026-04-22T05:15:05Z". When you do the recording, your response should have magic stringed the date using.

doDateDeltaFromRequest(yyyy-MM-dd","10D). You can change the days per your functionality.

Please look at the documentation for more information. If you still need more help, please share your RR pairs.

Prema 

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[Akshit koul]

Hi Prema

Thanks for replying

Its a get request 
https://xyz.com:443/test?userID=1234&requestedDateTime=2026-02-25T05%3A15%3A05Z

and then in response it looks like

{

 "DateTime": "2026-02-25T11:30:00+00:00"
}
So instead of a hardcoded field in response , we want the date +3 days from the date in request.
Also the magic date which you have shared above does it work on the type which we have in the url , as while recording devtest didnt convert it into magic string.

Thanks

Akshit

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[Atharva Gd]

Hi Akshit,

Since your datetime is coming as a query parameter in the GET request as "requestedDateTime=2026-02-25T05:15:05Z" you can reference that request component in the response using doDateDeltaFromRequest. The following will return the request datetime +3 days dynamically.

Example:
{
  "DateTime": "{{=doDateDeltaFromRequest(\"yyyy-MM-dd'T'HH:mm:ssX\",\"3D\")}}"
}

Besides, if your use-case involves dynamic date transformations, conditional responses, or complex IF/ELSE decisions, Beeceptor deep support for this. your ask can be simplied in the following syntax with Beeceptor which is a meta-style language, with dynamic helpers right inside mock responses building. i have used both Devtest and Beeceptor and this is my experience on configuration.
{
"responseDateTime": "{{dateAdd (queryParam 'DateTime') '{days:3}' 'iso'}}"
}

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