Dynamic Variables - Requestly

Dynamic variables are built in values that are generated automatically at request execution time. They remove the need for manual inputs or custom scripts when you need commonly used data like timestamps, random values, or unique identifiers. Unlike environment, collection, or global variables which you define yourself, dynamic variables are available out of the box and always generate a fresh value when a request runs.

Requestly uses Faker.js to generate realistic data for dynamic variables.

They are accessed using the special $ prefix syntax:

{{$variableName}}

Using dynamic variables

You can use dynamic variables anywhere in a request including the URL, headers, query params, and body.

Request Body
URL Parameters
Headers
Script

Use dynamic variables like {{$randomFirstName}}, {{$randomLastName}}, and {{$randomEmail}} to create unique user data for each request:

When using dynamic variables in scripts, call them as functions with the rq.$ prefix:

Script syntax: When using dynamic variables in scripts, call them as functions: rq.$variableName() instead of the template syntax {{$variableName}}.

Variable precedence

When the same variable name is defined as both a dynamic variable and a user-defined variable (environment, collection, or global), the user-defined variable takes precedence.

Precedence order

User-defined variables (Runtime → Environment → SubCollection → Collection → Global) > Dynamic variables Example : If you define an environment variable named $randomUUID:

rq.environment.set("$randomUUID", "123e4567-e89b-12d3-a456-426614174000");

And then use {{$randomUUID}} in your request, it will resolve to "123e4567-e89b-12d3-a456-426614174000" (your custom value), not the dynamic UUID value.

Best practice: Never use the $ prefix (e.g., {{$randomUUID}}) for user-defined variables.

Use arguments with dynamic variables

Some dynamic variables support optional arguments to customize their output.

For a complete list of variables that support arguments and their available options, see the Variables with arguments section below.

Syntax

  {{$variableName arg1 arg2 ...}}

Example:

{
  "id": "{{$randomAlphaNumeric 10}}",
  "email": "{{$randomEmail 'John' 'Doe'}}",
  "age": "{{$randomInt 18 65}}",
  "price": "{{$randomPrice 10 100 2 '$'}}"
}

Script syntax: When using dynamic variables in scripts, call them as functions: rq.$variableName(arg1,arg2 ...)

Supported dynamic variables

Requestly provides a comprehensive set of built-in dynamic variables organized by category.

Common

Variable	Description	Example
`{{$guid}}`	uuid-v4 style guid	`f47ac10b-58cc-4372-a567-0e02b2c3d479`
`{{$timestamp}}`	Current UNIX timestamp in seconds	`1739404800`
`{{$isoTimestamp}}`	Current ISO timestamp at zero UTC	`2026-02-13T14:25:30.177Z`
`{{$randomUUID}}`	A random 36-character UUID	`a3bb189e-8bf9-3888-9912-ace4e6543002`

Text, Numbers and Colors

Variable	Description	Example
`{{$randomAlphaNumeric}}`	A random alpha-numeric character	`t`
`{{$randomBoolean}}`	A random boolean value	`FALSE`
`{{$randomInt}}`	A random integer between 0 and 10000	`472`
`{{$randomColor}}`	A random human readable color	`blue`
`{{$randomHexColor}}`	A random hex value	`#2f8a45`
`{{$randomAbbreviation}}`	A random abbreviation	`HTTP`

Internet and IP Addresses

Variable	Description	Example
`{{$randomIP}}`	A random IPv4 address	`192.168.45.233`
`{{$randomIPV6}}`	A random IPv6 address	`2001:0db8:85a3:0000:0000:8a2e:0370:7334`
`{{$randomMACAddress}}`	A random MAC address	`aa:bb:cc:dd:ee:ff`
`{{$randomPassword}}`	A random 15-character alpha-numeric password	`8kP2mX9qL4nB5wV3`
`{{$randomLocale}}`	A random two-letter language code (ISO 639-1)	`fr`
`{{$randomUserAgent}}`	A random user agent	`Mozilla/5.0 ...`
`{{$randomProtocol}}`	A random internet protocol	`https`

Names

Variable	Description	Example
`{{$randomFirstName}}`	A random first name	`Sarah`
`{{$randomLastName}}`	A random last name	`Johnson`
`{{$randomFullName}}`	A random first and last name	`Michael Anderson`
`{{$randomNamePrefix}}`	A random name prefix	`Ms.`
`{{$randomNameSuffix}}`	A random name suffix	`Jr.`

Profession

Variable	Description	Example
`{{$randomJobArea}}`	A random job area	`Security`
`{{$randomJobDescriptor}}`	A random job descriptor	`Chief`
`{{$randomJobTitle}}`	A random job title	`Senior Data Analyst`
`{{$randomJobType}}`	A random job type	`Engineer`

Phone, Address and Location

Variable	Description	Example
`{{$randomPhoneNumber}}`	A random ten-digit phone number	`555-987-6543`
`{{$randomPhoneNumberExt}}`	A random phone number with extension	`555-456-7890 x321`
`{{$randomCity}}`	A random city name	`Riverside`
`{{$randomStreetName}}`	A random street name	`Oak Avenue`
`{{$randomStreetAddress}}`	A random street address	`456 Elm Drive`
`{{$randomCountry}}`	A random country	`Canada`
`{{$randomCountryCode}}`	A random two-letter country code (ISO 3166-1 alpha-2)	`US`
`{{$randomLatitude}}`	A random latitude coordinate	`-23.5475`
`{{$randomLongitude}}`	A random longitude coordinate	`151.2095`

Images

Variable	Description	Example
`{{$randomAvatarImage}}`	A random avatar image	`https://example.com/avatar/512x512`
`{{$randomImageUrl}}`	A URL of a random image	`https://example.com/images/640/480`
`{{$randomAbstractImage}}`	A URL of a random abstract image	`https://loremflickr.com/640/480/abstract`
`{{$randomAnimalsImage}}`	A URL of a random animal image	`https://loremflickr.com/640/480/animals`
`{{$randomBusinessImage}}`	A URL of a random stock business image	`https://loremflickr.com/640/480/business`
`{{$randomCatsImage}}`	A URL of a random cat image	`https://loremflickr.com/640/480/cats`
`{{$randomCityImage}}`	A URL of a random city image	`https://loremflickr.com/640/480/city`
`{{$randomFoodImage}}`	A URL of a random food image	`https://loremflickr.com/640/480/food`
`{{$randomNightlifeImage}}`	A URL of a random nightlife image	`https://loremflickr.com/640/480/nightlife`
`{{$randomFashionImage}}`	A URL of a random fashion image	`https://loremflickr.com/640/480/fashion`
`{{$randomPeopleImage}}`	A URL of a random image of a person	`https://loremflickr.com/640/480/people`
`{{$randomNatureImage}}`	A URL of a random nature image	`https://loremflickr.com/640/480/nature`
`{{$randomSportsImage}}`	A URL of a random sports image	`https://loremflickr.com/640/480/sports`
`{{$randomTransportImage}}`	A URL of a random transportation image	`https://loremflickr.com/640/480/transport`
`{{$randomImageDataUri}}`	A random image data URI	`data:image/svg+xml;charset=UTF-8...`

Finance

Variable	Description	Example
`{{$randomBankAccount}}`	A random 8-digit bank account number	`78945612`
`{{$randomBankAccountName}}`	A random bank account name	`Savings Account`
`{{$randomCreditCardMask}}`	A random masked credit card number	`1234`
`{{$randomBankAccountBic}}`	A random BIC (Bank Identifier Code)	`DEUTDEFF`
`{{$randomBankAccountIban}}`	A random 15-31 character IBAN	`GB82WEST12345698765432`
`{{$randomTransactionType}}`	A random transaction type	`payment`
`{{$randomCurrencyCode}}`	A random 3-letter currency code (ISO-4217)	`EUR`
`{{$randomCurrencyName}}`	A random currency name	`US Dollar`
`{{$randomCurrencySymbol}}`	A random currency symbol	`€`
`{{$randomBitcoin}}`	A random bitcoin address	`1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa`

Business

Variable	Description	Example
`{{$randomCompanyName}}`	A random company name	`TechStart Solutions`
`{{$randomCompanySuffix}}`	A random company suffix	`LLC`
`{{$randomBs}}`	A random phrase of business-speak	`streamline innovative platforms`
`{{$randomBsAdjective}}`	A random business-speak adjective	`dynamic`
`{{$randomBsBuzz}}`	A random business-speak buzzword	`optimize`
`{{$randomBsNoun}}`	A random business-speak noun	`solutions`

Catchphrases

Variable	Description	Example
`{{$randomCatchPhrase}}`	A random catchphrase	`Innovative scalable methodology`
`{{$randomCatchPhraseAdjective}}`	A random catchphrase adjective	`Robust`
`{{$randomCatchPhraseDescriptor}}`	A random catchphrase descriptor	`cloud-based`
`{{$randomCatchPhraseNoun}}`	A random catchphrase noun	`framework`

Databases

Variable	Description	Example
`{{$randomDatabaseColumn}}`	A random database column name	`userId`
`{{$randomDatabaseType}}`	A random database type	`varchar`
`{{$randomDatabaseCollation}}`	A random database collation	`utf8_unicode_ci`
`{{$randomDatabaseEngine}}`	A random database engine	`InnoDB`

Dates

Variable	Description	Example
`{{$randomDateFuture}}`	A random future datetime	`2027-11-05T18:30:22.000Z`
`{{$randomDatePast}}`	A random past datetime	`2023-08-14T15:45:33.000Z`
`{{$randomDateRecent}}`	A random recent datetime	`2026-02-07T10:20:15.000Z`
`{{$randomWeekday}}`	A random weekday	`Monday`
`{{$randomMonth}}`	A random month	`September`

Domains, Emails and Usernames

Variable	Description	Example
`{{$randomDomainName}}`	A random domain name	`test-site.net`
`{{$randomDomainSuffix}}`	A random domain suffix	`org`
`{{$randomDomainWord}}`	A random unqualified domain name	`sample`
`{{$randomEmail}}`	A random email address	`[email protected]`
`{{$randomExampleEmail}}`	A random email address from an example domain	`[email protected]`
`{{$randomUserName}}`	A random username	`techuser2024`
`{{$randomUrl}}`	A random URL	`https://demo-website.io`

Files and Directories

Variable	Description	Example
`{{$randomSemver}}`	A random semantic version number	`3.12.4`
`{{$randomFileName}}`	A random file name (includes uncommon extensions)	`report_2024.pdf`
`{{$randomFileType}}`	A random file type (includes uncommon file types)	`video`
`{{$randomFileExt}}`	A random file extension (includes uncommon extensions)	`csv`
`{{$randomCommonFileName}}`	A random file name	`presentation.pptx`
`{{$randomCommonFileType}}`	A random, common file type	`image`
`{{$randomCommonFileExt}}`	A random, common file extension	`jpg`
`{{$randomFilePath}}`	A random file path	`/var/www/html/index.html`
`{{$randomDirectoryPath}}`	A random directory path	`/opt/apps`
`{{$randomMimeType}}`	A random MIME type	`image/jpeg`

Stores

Variable	Description	Example
`{{$randomPrice}}`	A random price between 0.00 and 1000.00	`247.99`
`{{$randomProduct}}`	A random product	`Shoes`
`{{$randomProductAdjective}}`	A random product adjective	`Premium`
`{{$randomProductMaterial}}`	A random product material	`Cotton`
`{{$randomProductName}}`	A random product name	`Ergonomic Wooden Chair`
`{{$randomDepartment}}`	A random commerce category	`Electronics`

Grammar

Variable	Description	Example
`{{$randomNoun}}`	A random noun	`network`
`{{$randomVerb}}`	A random verb	`generate`
`{{$randomIngverb}}`	A random verb ending in -ing	`processing`
`{{$randomAdjective}}`	A random adjective	`efficient`
`{{$randomWord}}`	A random word	`system`
`{{$randomWords}}`	Some random words	`quick brown fox jumps high`
`{{$randomPhrase}}`	A random phrase	`Try to compress the TCP protocol...`

Lorem Ipsum

Variable	Description	Example
`{{$randomLoremWord}}`	A random word of lorem ipsum text	`ipsum`
`{{$randomLoremWords}}`	Some random words of lorem ipsum text	`dolor sit amet`
`{{$randomLoremSentence}}`	A random sentence of lorem ipsum text	`Sed ut perspiciatis unde omnis iste natus.`
`{{$randomLoremSentences}}`	A random 2 to 6 sentences of lorem ipsum text	`Nemo enim ipsam voluptatem...`
`{{$randomLoremParagraph}}`	A random paragraph of lorem ipsum text	`Lorem ipsum dolor sit amet...`
`{{$randomLoremParagraphs}}`	3 random paragraphs of lorem ipsum text	`Voluptatem rem magnam...`
`{{$randomLoremText}}`	A random amount of lorem ipsum text	`Temporibus autem quibusdam...`
`{{$randomLoremSlug}}`	A random lorem ipsum URL slug	`lorem-ipsum-dolor`
`{{$randomLoremLines}}`	1 to 7 random lines of lorem ipsum	`Sed ut perspiciatis unde...`

Variables with arguments

The following dynamic variables support optional arguments for customization.

Common

$guid

Arguments: version (4|7), refDate

{{$guid 7}}
{{$guid 4 "2026-01-01"}}

$randomUUID

Arguments: version (4|7), refDate

{{$randomUUID 7}}
{{$randomUUID 4 "2026-01-01"}}

Text, Numbers and Colors

$randomAlphaNumeric

Arguments: length | (min max), casing (upper|lower|mixed), exclude

{{$randomAlphaNumeric 5}}
{{$randomAlphaNumeric 3 8 "upper"}}

$randomBoolean

Arguments: probability (0-1)

{{$randomBoolean 0.8}}

$randomInt

Arguments: max | (min max)

{{$randomInt 100}}
{{$randomInt 1 100}}
{{$randomInt 0 100}}

$randomHexColor

{{$randomHexColor "css"}}
{{$randomHexColor "hex" "true" "#" "upper"}}

Internet and IP Addresses

$randomIP

Arguments: cidrBlock | network

{{$randomIP "192.168.0.0/16"}}

$randomMACAddress

Arguments: separator

{{$randomMACAddress "-"}}

$randomPassword

Arguments: length, memorable (true|false), pattern, prefix

{{$randomPassword 20}}
{{$randomPassword 12 "true"}}

Names

$randomFirstName

Arguments: gender (male|female)

{{$randomFirstName "male"}}

$randomLastName

Arguments: gender (male|female)

{{$randomLastName "female"}}

$randomFullName

Arguments: gender (male|female)

{{$randomFullName "male"}}

$randomNamePrefix

Arguments: gender (male|female)

{{$randomNamePrefix "female"}}

Phone, Address and Location

$randomPhoneNumber

Arguments: style (human|national|international)

{{$randomPhoneNumber "international"}}

$randomStreetAddress

Arguments: useFullAddress (true|false)

{{$randomStreetAddress "true"}}

$randomCountryCode

Arguments: variant (alpha-2|alpha-3|numeric)

{{$randomCountryCode "alpha-3"}}

$randomLatitude

Arguments: max | (min max), precision

{{$randomLatitude 50}}
{{$randomLatitude -10 50 4}}

$randomLongitude

Arguments: max | (min max), precision

{{$randomLongitude 100}}
{{$randomLongitude -100 100 4}}

Images

$randomImageUrl

Arguments: width, height

{{$randomImageUrl 800 600}}

$randomImageDataUri

Arguments: width, height, color, type (svg-uri|svg-base64)

{{$randomImageDataUri 200 200 "blue" "svg-base64"}}

Finance

$randomBankAccount

Arguments: length (default 8)

{{$randomBankAccount 10}}

$randomCreditCardMask

Arguments: issuer

{{$randomCreditCardMask "visa"}}

$randomBankAccountBic

Arguments: includeBranchCode (true|false)

{{$randomBankAccountBic "true"}}

$randomBankAccountIban

Arguments: formatted (true|false), countryCode

{{$randomBankAccountIban "true" "DE"}}

$randomBitcoin

Arguments: type (legacy|segwit|bech32), network (mainnet|testnet)

{{$randomBitcoin "segwit" "mainnet"}}

Dates

$randomDateFuture

Arguments: years, refDate

{{$randomDateFuture 5}}
{{$randomDateFuture 2 "2025-01-01"}}

$randomDatePast

Arguments: years, refDate

{{$randomDatePast 3}}
{{$randomDatePast 1 "2024-06-01"}}

$randomDateRecent

Arguments: days, refDate

{{$randomDateRecent 7}}
{{$randomDateRecent 30 "2026-01-01"}}

$randomWeekday

Arguments: abbreviated (true|false), context (true|false)

{{$randomWeekday "true"}}

$randomMonth

Arguments: abbreviated (true|false), context (true|false)

{{$randomMonth "true"}}

Domains, Emails and Usernames

$randomEmail

Arguments: firstName, lastName, provider, allowSpecialCharacters (true|false)

{{$randomEmail "John"}}
{{$randomEmail "John" "Doe" "gmail.com"}}

$randomExampleEmail

Arguments: firstName, lastName, allowSpecialCharacters (true|false)

{{$randomExampleEmail "John" "Doe"}}

$randomUserName

Arguments: firstName, lastName

{{$randomUserName "John" "Doe"}}

$randomUrl

Arguments: protocol (http|https), appendSlash (true|false)

{{$randomUrl "https" "true"}}

Files and Directories

$randomFileName

Arguments: extensionCount | (min max)

{{$randomFileName 2}}
{{$randomFileName 1 3}}

$randomFileExt

Arguments: mimeType

{{$randomFileExt "image/jpeg"}}

Stores

$randomPrice

Arguments: max | (min max), dec, symbol

{{$randomPrice 500}}
{{$randomPrice 10 100 2 "$"}}

Grammar

$randomNoun

{{$randomNoun 5}}
{{$randomNoun 3 8 "closest"}}

$randomVerb

{{$randomVerb 5}}
{{$randomVerb 3 8 "closest"}}

$randomAdjective

{{$randomAdjective 5}}
{{$randomAdjective 3 8 "closest"}}

$randomWord

{{$randomWord 5}}
{{$randomWord 3 8 "closest"}}

$randomWords

Arguments: count | (min max)

{{$randomWords 3}}
{{$randomWords 2 5}}

Lorem Ipsum

$randomLoremWord

{{$randomLoremWord 5}}
{{$randomLoremWord 3 8 "closest"}}

$randomLoremWords

Arguments: count | (min max)

{{$randomLoremWords 5}}
{{$randomLoremWords 3 7}}

$randomLoremSentence

Arguments: wordCount | (min max)

{{$randomLoremSentence 10}}
{{$randomLoremSentence 5 12}}

$randomLoremSentences

Arguments: count | (min max), separator

{{$randomLoremSentences 3}}
{{$randomLoremSentences 2 5}}

$randomLoremParagraph

Arguments: sentenceCount | (min max)

{{$randomLoremParagraph 5}}
{{$randomLoremParagraph 3 7}}

$randomLoremParagraphs

Arguments: count | (min max), separator

{{$randomLoremParagraphs 5}}
{{$randomLoremParagraphs 2 4}}

$randomLoremSlug

Arguments: count | (min max)

{{$randomLoremSlug 5}}
{{$randomLoremSlug 2 4}}

$randomLoremLines

Arguments: count | (min max)

{{$randomLoremLines 3}}
{{$randomLoremLines 2 5}}

​Using dynamic variables

​Variable precedence

​Precedence order

​Use arguments with dynamic variables

​Syntax

​Supported dynamic variables

​Common

​Text, Numbers and Colors

​Internet and IP Addresses

​Names

​Profession

​Phone, Address and Location

​Images

​Finance

​Business

​Catchphrases

​Databases

​Dates

​Domains, Emails and Usernames

​Files and Directories

​Stores

​Grammar

​Lorem Ipsum

​Variables with arguments

​Common

​Text, Numbers and Colors

​Internet and IP Addresses

​Names

​Phone, Address and Location

​Images

​Finance

​Dates

​Domains, Emails and Usernames

​Files and Directories

​Stores

​Grammar

​Lorem Ipsum

​What’s Next?

Environment Variables

Runtime Variables

Using dynamic variables

Variable precedence

Precedence order

Use arguments with dynamic variables

Syntax

Supported dynamic variables

Common

Text, Numbers and Colors

Internet and IP Addresses

Names

Profession

Phone, Address and Location

Images

Finance

Business

Catchphrases

Databases

Dates

Domains, Emails and Usernames

Files and Directories

Stores

Grammar

Lorem Ipsum

Variables with arguments

Common

Text, Numbers and Colors

Internet and IP Addresses

Names

Phone, Address and Location

Images

Finance

Dates

Domains, Emails and Usernames

Files and Directories

Stores

Grammar

Lorem Ipsum

What’s Next?