Template Variables

Template Variables

Template variables let you generate dynamic, realistic data in your mock responses. Use double curly braces: {{variableName}}.

Basic Usage

In your response body:

{
  "id": "{{uuid}}",
  "name": "{{name}}",
  "email": "{{email}}"
}

Each request generates fresh random data.

Request Data

Access data from the incoming request:

Variable	Description	Example
{{params.id}}	Path parameter	/users/{id} -> {{params.id}}
{{query.page}}	Query string	?page=2 -> {{query.page}}
{{body.name}}	Request body field	JSON body access
{{headers.authorization}}	Request header	Header value

Environment Variables

Access variables from the active environment:

Variable	Description
{{env.VAR_NAME}}	Value of VAR_NAME from the active environment

Environment variables are set in the Environments panel. Select an active environment to make its variables available in templates, proxy target URLs, and authentication fields. See Environments for full details on creating and managing environments.

{
  "api_key": "{{env.API_KEY}}",
  "base_url": "{{env.BASE_URL}}"
}

If no environment is active or the variable is not defined, {{env.VAR_NAME}} resolves to an empty string.

Available Helpers

Identity

Helper	Output
{{uuid}}	a1b2c3d4-e5f6-7890-...
{{name}}	John Smith
{{firstName}}	John
{{lastName}}	Smith
{{username}}	jsmith42

Contact

Helper	Output
{{email}}	[email protected]
{{phone}}	(555) 123-4567

Location

Helper	Output
{{address}}	123 Main St
{{city}}	San Francisco
{{state}}	California
{{zipCode}}	94102
{{country}}	United States

Business

Helper	Output
{{company}}	Acme Corp
{{jobTitle}}	Software Engineer

Internet

Helper	Output
{{url}}	https://example.com/page
{{domain}}	example.com
{{ipv4}}	192.168.1.1

Date & Time

Helper	Output
{{date}}	2026-01-15
{{timestamp}}	1737043200
{{pastDate}}	Date in the past
{{futureDate}}	Date in the future

Numbers

Helper	Output
{{number 1 100}}	Random integer 1-100
{{float 0 1 2}}	Random float with 2 decimals
{{boolean}}	true or false

Text

Helper	Output
{{lorem}}	Lorem ipsum paragraph
{{sentence}}	Random sentence
{{word}}	Random word

Arrays with Repeat

Generate arrays of items:

[
  {{#repeat 5}}
  {
    "id": "{{uuid}}",
    "name": "{{name}}"
  }{{#unless @last}},{{/unless}}
  {{/repeat}}
]

Generates an array of 5 user objects.

Full Reference

See Template Helpers Reference for the complete list.