How to change request body before sending request

[singhsivcan (Sivcan Singh)]

Hi @mockdev_postman, welcome to the community!

There are couple of solutions already present in the community (I just searched for these):
Search Query: Search results for 'Dynamic request body' - Postman Community

Couple of results that point towards the similar kind of problem:

Use different params for different Request

@Aravind_Shankar I recently came across a similar question around this on SO - I wrote an answer there, you can use that answer as a step towards solving your problem. You can dynamically generate request body / params using a variable and the pre-request script.

Conditional JSON payload based on csv variables

@mrosi Here’s what you can do: Build a dynamic request body, what I mean by that is you need to build the request body from the pre-request script, and make it a variable something like this: [image] So every iteration in the runner will get the corresponding data from the csv file. To access the current iteration data you can use the pm.iterationData API in your pre-request script: let currentData = pm.iterationData.toJSON(), dynamicRequestBody = {}; // Now let's build the body u…

Variables: passing array variable into collection variables

I have a request body that I am setting using a Collection variable - in a Pre-Request script. I then am also marking one of the properties on that request body as a variable, like so: var obj = { "header": { "initiatorId": "Test, The", "responderId": "Just", "messageId": "e24caae1-07fd-4785-900c-73c698065c99", "messageTimestamp": "2020-03-25T14:38:16.198Z", "serviceId": "Test", }, "payload": { "serviceControl": { }, "intermediary": { "firmFcaRef": "{…