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Variable Syntax

Basic Syntax​

Wrap the variable name in double curly braces:

{{variableName}}

Variables are case-sensitive: {{baseUrl}} and {{BaseUrl}} are different variables.

Where Variables Work​

LocationSupported
URL✅
Query parameter keys✅
Query parameter values✅
Header keys✅
Header values✅
Raw body✅
Bearer token✅
Basic auth username/password✅
API Key value✅
OAuth 2.0 token URL, client ID/secret✅
Pre-request scripts (via rm.variables.get())✅

Examples​

URL with base URL and path variable:

{{baseUrl}}/users/{{userId}}

Header with token:

Authorization: Bearer {{accessToken}}

JSON body:

{
  "email": "{{testEmail}}",
  "password": "{{testPassword}}"
}

Unresolved Variables​

If a variable is used but not defined in any scope, it is sent as-is:

{{undefinedVar}}  →  sent literally as  {{undefinedVar}}

Setting Variables from Scripts​

You can set variables dynamically in pre-request scripts:

// Set an environment variable
rm.environment.set('accessToken', 'abc123')

// Set a collection variable
rm.collectionVariables.set('userId', '42')

// Set a global variable
rm.globals.set('sharedKey', 'value')

See the rm.* API Reference for full details.