🔠 Tool for generation samples based on OpenAPI(fka Swagger) payload/response schema
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Latest commit 61c392d Nov 8, 2018



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Tool for generation samples based on OpenAPI payload/response schema


  • deterministic (given a particular input, will always produce the same output)
  • Supports allOf
  • Supports additionalProperties
  • Uses default, example and enum where possible
  • Full array support: supports minItems, and tuples (items as an array)
  • Supports minLength, maxLength, min, max, exclusiveMinimum, exclusiveMaximum
  • Supports the next string formats:
    • email
    • password
    • date-time
    • date
    • ipv4
    • ipv6
    • hostname
    • uri
  • Infers schema type automatically following same rules as json-schema-faker
  • Support for $ref resolving


Install using npm

npm install openapi-sampler --save

or using yarn

yarn add openapi-sampler

Then require it in your code:

var OpenAPISampler = require('openapi-sampler');


OpenAPISampler.sample(schema, [options], [spec])

  • schema (required) - object A OpenAPI Schema Object
  • options (optional) - object Available options:
    • skipNonRequired - boolean Don't include non-required object properties not specified in required property of the schema object
    • skipReadOnly - boolean Don't include readOnly object properties
    • skipWriteOnly - boolean Don't include writeOnly object properties
  • spec - whole specification where the schema is taken from. Required only when schema may contain $ref. spec must not contain any external references


const OpenAPISampler = require('.');
  type: 'object',
  properties: {
    a: {type: 'integer', minimum: 10},
    b: {type: 'string', format: 'password', minLength: 10},
    c: {type: 'boolean', readOnly: true}
}, {skipReadOnly: true});
// { a: 10, b: 'pa$$word_q' }