Postman - How to pass a global variable into JSON body

Question

I'm working with Postman right now and I have to do a lot of requests, and in the body I'm passing a JSON content. I would like to know if is there a way to pass the value of a global variable into JSON body. Thank you.

score 85 · Answer 1 · answered Jul 11 '17 at 01:21

85

If using a raw JSON body:

{
    "test key":"{{global variable}}"
}

On sending the request, the curly braces will be replaced with the value of the variable.

answered Jul 11 '17 at 01:21

RadamHussein

891
7
9

1

How do you replace the ENTIRE POST Body with a variable? I tried raw body with only `{{varName}}`,but its not highlighted in Postman nor accepted from the service. – SeaDude Oct 24 '19 at 04:47

score 7 · Answer 2 · answered Mar 31 '16 at 11:15

7

I think what you want to do is described here.

To use a variable you need to enclose the variable name with double curly braces – {{my_variable_name}}.

answered Mar 31 '16 at 11:15

Philipp Stauss

721
7
22

bartpie · Answer 3 · 2017-01-02T12:48:23.297

5

Double curly bracket is working in header parameter, url or inside JSON body. Inside tests you should use globals example: {"url": globals.url} or {"url": globals["url"]}

edited Jan 02 '17 at 12:48

answered Dec 22 '16 at 14:12

bartpie

155
2
5

score 2 · Answer 4 · answered Oct 25 '18 at 15:18

Yep, double curly brackets is the way to go to achieve this - make sure you have the latest version of Postman (though if you are still running 2014 code when this feature was introduced, shame on you!)

eg:

{
    "variable": "{{value}}"
}

See the second paragraph here in the Variables section of the documentation - it specifically mentions the request body.

score 1 · Answer 5 · edited Aug 13 '18 at 14:48

1

You can pass

{
   "productId": {{**ProductID**}},
   "quantity": 1
}

Where ProductID is your global variable name
in raw format JSON (application/json)

edited Aug 13 '18 at 14:48

L_J

2,351
10
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28

answered Aug 13 '18 at 14:07

Shailendra

77
1
4

I'm not sure why this works, but it does. I was following the official documentation and a bunch of other answers on stackoverflow and other forums, everything says to just use double quotes around your variable (along with the double curlies). This kept giving me errors. As soon as I added the double asterisks it started working. – Damian Esteves Apr 28 '22 at 19:01

Postman - How to pass a global variable into JSON body

5 Answers5