A Ruby gem that reads OpenAPI specifications and automatically generates type-safe client SDKs in multiple languages (Ruby and JavaScript).

gem install openapi_sdk_generator_gem

Generate SDKs from an OpenAPI specification file or URL:

# Show help
openapi-sdk-generator --help

# Generate JavaScript SDK from local file
openapi-sdk-generator -i path/to/openapi.yaml -o ./output -l javascript

# Generate Ruby SDK from local file
openapi-sdk-generator -i path/to/openapi.yaml -o ./output -l ruby

# Generate from URL
openapi-sdk-generator -i https://example.com/openapi.yaml -o ./output -l ruby

Options:

• -i, --input: Path or URL to OpenAPI specification (YAML/JSON)
• -o, --output: Output directory for generated SDK
• -l, --language: Target language (ruby or javascript)

require 'openapi_sdk_generator'

# Parse OpenAPI specification
parser = OpenapiSdkGenerator::Parser.new('path/to/openapi.yaml')

# Generate Ruby SDK
ruby_generator = OpenapiSdkGenerator::Generators::RubyGenerator.new(parser)
ruby_generator.write_to_directory('./output/ruby')

# Generate JavaScript SDK
js_generator = OpenapiSdkGenerator::Generators::JavascriptGenerator.new(parser)
js_generator.write_to_directory('./output/javascript')

require 'openapi_sdk_generator'

# Parse from URL
url = 'https://raw.githubusercontent.com/example/openapi.yaml'
parser = OpenapiSdkGenerator::Parser.new(url)

# Generate SDK
generator = OpenapiSdkGenerator::Generators::RubyGenerator.new(parser)
generator.write_to_directory('./output')

Using the Petstore OpenAPI specification:

openapi-sdk-generator \
  -i https://raw.githubusercontent.com/taimourz/openapi_sdk_generator_gem/main/test/fixtures/petstore.yaml \
  -o ./my-sdk \
  -l ruby

This generates:

my-sdk/
├── README.md          # Usage documentation
├── client.rb          # API client with all methods
└── models/            # Data models
    ├── pet.rb
    ├── error.rb
    └── newpet.rb

• client.rb - Main API client with HTTP methods for each endpoint
• models/*.rb - Individual model classes with serialization/deserialization
• README.md - Auto-generated documentation with usage examples

• client.js - API client with async/await methods
• package.json - NPM package configuration
• README.md - Auto-generated documentation

• Ruby 2.7 or higher
• OpenAPI Specification 3.0+

• GitHub Repository: github.com/taimourz/openapi_sdk_generator_gem
• RubyGems: rubygems.org/gems/openapi_sdk_generator_gem
• Blog Tutorial: taimourz.github.io/portfolio/notes/openapi-sdk