Template Helpers Reference

Complete reference of all available template helpers. Use in response bodies with {{helperName}} syntax.

Request Context

Helper	Description	Example Input	Example Output
{{params.name}}	Path parameter	/users/{id} called as /users/42	42
{{query.name}}	Query parameter	?page=2&limit=10	2
{{body.field}}	Request body field	{"name": "Alice"}	Alice
{{body.nested.field}}	Nested body field	{"user": {"id": 1}}	1
{{headers.name}}	Request header	Authorization: Bearer xyz	Bearer xyz
{{method}}	HTTP method	-	GET
{{path}}	Request path	-	/api/users/42

Identifiers

Helper	Description	Example Output
{{uuid}}	UUID v4	a1b2c3d4-e5f6-7890-abcd-1234567890ab
{{objectId}}	MongoDB-style ID	507f1f77bcf86cd799439011

People

Helper	Description	Example Output
{{name}}	Full name	John Smith
{{firstName}}	First name	John
{{lastName}}	Last name	Smith
{{username}}	Username	jsmith42
{{email}}	Email address	john.smith@example.com
{{phone}}	Phone number	(555) 123-4567
{{avatar}}	Avatar URL	https://...

Location

Helper	Description	Example Output
{{address}}	Street address	123 Main St
{{city}}	City	San Francisco
{{state}}	State/Province	California
{{stateAbbr}}	State abbreviation	CA
{{zipCode}}	ZIP/Postal code	94102
{{country}}	Country	United States
{{countryCode}}	Country code	US
{{latitude}}	Latitude	37.7749
{{longitude}}	Longitude	-122.4194

Business

Helper	Description	Example Output
{{company}}	Company name	Acme Corporation
{{jobTitle}}	Job title	Software Engineer
{{department}}	Department	Engineering

Internet

Helper	Description	Example Output
{{url}}	URL	https://example.com/page
{{domain}}	Domain name	example.com
{{ipv4}}	IPv4 address	192.168.1.1
{{ipv6}}	IPv6 address	2001:0db8:85a3:...
{{userAgent}}	User agent string	Mozilla/5.0...
{{color}}	Hex color	#3498db

Date & Time

Helper	Description	Example Output
{{date}}	ISO date	2026-01-15
{{datetime}}	ISO datetime	2026-01-15T10:30:00Z
{{timestamp}}	Unix timestamp	1737043200
{{timestampMs}}	Unix timestamp (ms)	1737043200000
{{pastDate}}	Past date	2025-06-20
{{futureDate}}	Future date	2026-08-15
{{now}}	Current ISO datetime	2026-01-23T14:30:00Z

Numbers

Helper	Syntax	Description	Example Output
{{number}}	{{number min max}}	Random integer	{{number 1 100}} -> 42
{{float}}	{{float min max precision}}	Random float	{{float 0 1 2}} -> 0.73
{{boolean}}	{{boolean}}	Random boolean	true
{{price}}	{{price min max}}	Price format	{{price 10 100}} -> 49.99

Text

Helper	Description	Example Output
{{lorem}}	Lorem paragraph	Lorem ipsum dolor sit...
{{sentence}}	Random sentence	The quick brown fox...
{{word}}	Random word	synergy
{{words 5}}	N random words	alpha beta gamma delta epsilon
{{paragraph}}	Paragraph	Multiple sentences

Arrays & Repetition

repeat

Generate arrays:

[
{{#repeat 3}}
  {"id": {{@index}}, "name": "{{name}}"}{{#unless @last}},{{/unless}}
{{/repeat}}
]

Output:

[
  {"id": 0, "name": "Alice Johnson"},
  {"id": 1, "name": "Bob Smith"},
  {"id": 2, "name": "Carol Williams"}
]

Variables inside repeat: - {{@index}} - Current index (0-based) - {{@first}} - True if first iteration - {{@last}} - True if last iteration

oneOf

Pick randomly from options:

{{oneOf "active" "pending" "inactive"}}

Conditional Helpers

if / unless

{{#if params.id}}
  {"id": "{{params.id}}"}
{{else}}
  {"error": "ID required"}
{{/if}}

Compare helpers

{{#eq query.status "active"}}
  Active users
{{/eq}}

{{#gt query.page 1}}
  Has previous page
{{/gt}}

Available: eq, ne, gt, gte, lt, lte