Test Data — entry 012 of 19

Randommer

Verified Jul 2026

Randommer's REST API generates disposable test data on demand — phone numbers, card numbers, addresses, names, and lorem-ipsum-style text among dozens of resource types — returned as JSON over HTTPS. Every call requires an API key sent via the X-Api-Key header, and usage is capped at 1,000 free calls per day with no paid upgrade currently offered. Endpoints are documented through both Swagger and ReDoc references alongside a downloadable OpenAPI spec.

mock-datarandom-generatortest-data-generatorapi-key-required

Visit randommer.io ↗Read the docs ↗More Test Data

AuthenticationAPI KeySign up with the provider to obtain credentials.

HTTPSSupportedTraffic is encrypted in transit.

CORSEnabledCallable directly from browser JavaScript.

PricingFreeNo paid tier — free for the documented use case.

FormatsJSONResponses can be requested as JSON.

GreatAPIs Score

Score84out of 100

Authentication15/25API key required

Pricing20/20Free to use

Docs20/20Machine-readable spec file bundled

Formats9/15Single response format

Freshness20/20Verified within 6 months

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<a href="https://greatapis.com/api/randommer/"><img src="https://greatapis.com/badge/randommer.svg" alt="Scored 84 on greatapis.com"></a>

Auth quickstart

Sign up with the provider to get an API key.
Send it on every request as a headerX-Api-Key: <key>

Stored keyNo key stored

Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.

Endpoints

Card2

GET/api/CardGet Card

Parameters

Name	In	Required	Type
`type`	query	no	string
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Card/TypesGet available card types

Parameters

Name	In	Required	Type
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

Finance5

GET/api/Finance/CountriesGet available countries

Parameters

Name	In	Required	Type
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Finance/CryptoAddressGet crypto address

Parameters

Name	In	Required	Type
`cryptoType`	query	no	string
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Finance/CryptoAddress/TypesGet available crypto types

Parameters

Name	In	Required	Type
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Finance/Iban/{countryCode}Get IBAN by countryCode

Parameters

Name	In	Required	Type
`countryCode`	path	yes	string
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

POST/api/Finance/Vat/Validator

Parameters

Name	In	Required	Type
`country`	query	yes	string
`vat`	query	yes	string
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

Misc2

GET/api/Misc/Cultures

Parameters

Name	In	Required	Type
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Misc/Random-Address

Parameters

Name	In	Required	Type
`number`	query	yes	integer
`culture`	query	no	string
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

Name5

GET/api/NameGet name

Parameters

Name	In	Required	Type
`nameType`	query	yes	—
`quantity`	query	yes	integer
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

POST/api/Name/BrandNameGenerate brand name suggestions

Parameters

Name	In	Required	Type
`startingWords`	query	yes	string
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

POST/api/Name/BusinessNameGet business names for a specific culture

Parameters

Name	In	Required	Type
`number`	query	yes	integer
`cultureCode`	query	no	string
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Name/CulturesGet available cultures

Parameters

Name	In	Required	Type
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Name/SuggestionsGet business name suggestions

Parameters

Name	In	Required	Type
`startingWords`	query	yes	string
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

Phone4

GET/api/Phone/CountriesGet available countries

Parameters

Name	In	Required	Type
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Phone/GenerateGet bulk telephone numbers for a country

Parameters

Name	In	Required	Type
`CountryCode`	query	yes	string
`Quantity`	query	yes	integer
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Phone/IMEIGet bulk imeis

Parameters

Name	In	Required	Type
`Quantity`	query	yes	integer
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Phone/ValidateValidate a phone number

Parameters

Name	In	Required	Type
`telephone`	query	yes	string
`CountryCode`	query	no	string
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

SocialNumber2

GET/api/SocialNumberGenerate a social security number

Parameters

Name	In	Required	Type
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

POST/api/SocialNumberValidate VAT/identity numbers

Parameters

Name	In	Required	Type
`idType`	query	yes	—
`X-Api-Key`	header	no	string

Request body

application/json-patch+json — NumberValidation (required)

Responses

Status	Description	Schema
`200`	OK	—

Text5

POST/api/Text/HumanizeHumanize text

Parameters

Name	In	Required	Type
`X-Api-Key`	header	no	string

Request body

application/json-patch+json — TextDto (required)

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Text/LoremIpsumGenerate lorem ipsum

Parameters

Name	In	Required	Type
`loremType`	query	yes	—
`type`	query	yes	—
`number`	query	yes	integer
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

GET/api/Text/PasswordGenerate password

Parameters

Name	In	Required	Type
`length`	query	yes	integer
`hasDigits`	query	yes	boolean
`hasUppercase`	query	yes	boolean
`hasSpecial`	query	yes	boolean
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

POST/api/Text/ReviewGet reviews (max quantity=500)

Parameters

Name	In	Required	Type
`product`	query	yes	string
`quantity`	query	yes	integer
`X-Api-Key`	header	no	string

Responses

Status	Description	Schema
`200`	OK	—

POST/api/Text/TransformTransform text

Parameters

Name	In	Required	Type
`textActionType`	query	yes	—
`caseType`	query	no	—
`find`	query	no	string
`replace`	query	no	string
`X-Api-Key`	header	no	string

Request body

application/json-patch+json — TextDto (required)

Responses

Status	Description	Schema
`200`	OK	—

Try it

Operation

API key

Developer reference

Base URLhttps://randommer.io

Rate limit

1,000 calls per day on the free tier, per randommer.io's own FAQ — no paid tier to raise the cap currently offered.

Key endpoints

GET/api/Name
GET/api/Phone/Generate

GreatAPIs Score

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Auth quickstart

Endpoints

Try it

Developer reference

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