System variables

NativeRest uses built-in library to generate sample data, including random names, addresses, email addresses, and much more. You can use these pre-defined variables multiple times to return different values per request.

You can use these variables like any other variable in NativeRest. Their values are generated at the time of execution and their names start with {{, for example {{random.uuid}} or {{date.isoTimeStamp}}.

You can also use shortcut Ctrl + E to open System Variables window.

All NativeRest system variables

The following is a list of system variables whose values are randomly generated during the request/collection run.

Custom random variables

In NativeRest, you can define variables whose values will be chosen randomly from a set of values. Such variables must begin with the prefix random. Values in a line must be separated by commas, spaces are ignored.

# Random city in Spain
random.spainCities = Madrid, Barcelona, Valencia, Seville, Bilbao

Functions

Starting with NativeRest 2.5.0, hash functions and some other functions became available.

# Hash functions
md5(...)
sha1(...)
sha224(...)
sha256(...)
sha384(...)
sha512(...)

# Base64 Encode and Decode functions
base64.encode(...)
base64.decode(...)

# DateTime functions
date.format(...)

# Random functions
random.integer(...)

Date and time format specifiers

Date Time Format strings are composed of specifiers that represent values to be inserted into the formatted string. Case is ignored in formats, except for the "am/pm" and "a/p" specifiers.

For example, to display the current date and time (hours and minutes), you can use the following syntax:

{{date.format(yyyy-mm-dd hh:nn)}}
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2025-05-08 12:05