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OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

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OpenAPI Generator

Stable releases in Maven Central Apache 2.0 License Open Collective backers Join the Slack chat room Follow OpenAPI Generator Twitter account to get the latest update Contribute with Gitpod Conan Center

Master (6.6.0): Build Status Integration Test2 Windows Test Bitrise

7.0.x (7.0.x): Build Status Integration Test2 Windows Test Bitrise

⭐⭐⭐ If you would like to contribute, please refer to guidelines and a list of open tasks.:star::star::star:

‼️ To migrate from Swagger Codegen to OpenAPI Generator, please refer to the migration guide ‼️

📔 For more information, please refer to the Wiki page and FAQ 📔

📔 The eBook A Beginner's Guide to Code Generation for REST APIs is a good starting point for beginners 📔

⚠️ If the OpenAPI spec, templates or any input (e.g. options, environment variables) is obtained from an untrusted source or environment, please make sure you've reviewed these inputs before using OpenAPI Generator to generate the API client, server stub or documentation to avoid potential security issues (e.g. code injection). For security vulnerabilities, please contact [email protected]. ⚠️

‼️ Both "OpenAPI Tools" (https://OpenAPITools.org - the parent organization of OpenAPI Generator) and "OpenAPI Generator" are not affiliated with OpenAPI Initiative (OAI) ‼️

Sponsors

If you find OpenAPI Generator useful for work, please consider asking your company to support this Open Source project by becoming a sponsor. You can also individually sponsor the project by becoming a backer.

Thank you to our bronze sponsors!

NamSor LightBow

Thank you GoDaddy for sponsoring the domain names, Linode for sponsoring the VPS and Checkly for sponsoring the API monitoring

Linode

Overview

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (both 2.0 and 3.0 are supported). Currently, the following languages/frameworks are supported:

Languages/Frameworks
API clients ActionScript, Ada, Apex, Bash, C, C# (.net 2.0, 3.5 or later, .NET Standard 1.3 - 2.1, .NET Core 3.1, .NET 5.0. Libraries: RestSharp, GenericHost, HttpClient), C++ (Arduino, cpp-restsdk, Qt5, Tizen, Unreal Engine 4), Clojure, Crystal, Dart, Elixir, Elm, Eiffel, Erlang, Go, Groovy, Haskell (http-client, Servant), Java (Apache HttpClient 4.x, Apache HttpClient 5.x, Jersey1.x, Jersey2.x, OkHttp, Retrofit1.x, Retrofit2.x, Feign, RestTemplate, RESTEasy, Vertx, Google API Client Library for Java, Rest-assured, Spring 5 Web Client, MicroProfile Rest Client, Helidon), Jetbrains HTTP Client, Julia, k6, Kotlin, Lua, Nim, Node.js/JavaScript (ES5, ES6, AngularJS with Google Closure Compiler annotations, Flow types, Apollo GraphQL DataStore), Objective-C, OCaml, Perl, PHP, PowerShell, Python, R, Ruby, Rust (hyper, reqwest, rust-server), Scala (akka, http4s, scalaz, sttp, swagger-async-httpclient), Swift (2.x, 3.x, 4.x, 5.x), Typescript (AngularJS, Angular (2.x - 15.x), Aurelia, Axios, Fetch, Inversify, jQuery, Nestjs, Node, redux-query, Rxjs)
Server stubs Ada, C# (ASP.NET Core, Azure Functions), C++ (Pistache, Restbed, Qt5 QHTTPEngine), Erlang, F# (Giraffe), Go (net/http, Gin, Echo), Haskell (Servant, Yesod), Java (MSF4J, Spring, Undertow, JAX-RS: CDI, CXF, Inflector, Jersey, RestEasy, Play Framework, PKMST, Vert.x, Apache Camel, Helidon), Julia, Kotlin (Spring Boot, Ktor, Vertx), PHP (Laravel, Lumen, Mezzio (fka Zend Expressive), Slim, Silex, Symfony), Python (FastAPI, Flask), NodeJS, Ruby (Sinatra, Rails5), Rust (rust-server), Scala (Akka, Finch, Lagom, Play, Scalatra)
API documentation generators HTML, Confluence Wiki, Asciidoc, Markdown, PlantUML
Configuration files Apache2
Others GraphQL, JMeter, Ktorm, MySQL Schema, Protocol Buffer, WSDL

Table of contents

1 - Installation

1.1 - Compatibility

The OpenAPI Specification has undergone 3 revisions since initial creation in 2010. The openapi-generator project has the following compatibilities with the OpenAPI Specification:

OpenAPI Generator Version Release Date Notes
7.0.0 (upcoming major release) SNAPSHOT May/Jun 2023 Major release with breaking changes (no fallback)
6.6.0 (upcoming minor release) SNAPSHOT 28.04.2023 Minor release with breaking changes (with fallback)
6.5.0 (latest stable release) 01.04.2023 Minor release with breaking changes (with fallback)
5.4.0 31.01.2022 Minor release with breaking changes (with fallback)
4.3.1 06.05.2020 Patch release (enhancements, bug fixes, etc)

OpenAPI Spec compatibility: 1.0, 1.1, 1.2, 2.0, 3.0

For old releases, please refer to the Release page.

For decomissioned generators/libraries/frameworks, please refer to the "Decommission" label in the pull request page.

1.2 - Artifacts on Maven Central

You can find our released artifacts on maven central:

Core:

<dependency>
    <groupId>org.openapitools</groupId>
    <artifactId>openapi-generator</artifactId>
    <version>${openapi-generator-version}</version>
</dependency>

See the different versions of the openapi-generator artifact available on maven central.

Cli:

<dependency>
    <groupId>org.openapitools</groupId>
    <artifactId>openapi-generator-cli</artifactId>
    <version>${openapi-generator-version}</version>
</dependency>

See the different versions of the openapi-generator-cli artifact available on maven central.

Maven plugin:

<dependency>
    <groupId>org.openapitools</groupId>
    <artifactId>openapi-generator-maven-plugin</artifactId>
    <version>${openapi-generator-version}</version>
</dependency>

Gradle plugin:

<dependency>
    <groupId>org.openapitools</groupId>
    <artifactId>openapi-generator-gradle-plugin</artifactId>
    <version>${openapi-generator-version}</version>
</dependency>

1.3 - Download JAR

If you're looking for the latest stable version, you can grab it directly from Maven.org (Java 8 runtime at a minimum):

JAR location: https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli/6.5.0/openapi-generator-cli-6.5.0.jar

For Mac/Linux users:

wget https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli/6.5.0/openapi-generator-cli-6.5.0.jar -O openapi-generator-cli.jar

For Windows users, you will need to install wget or you can use Invoke-WebRequest in PowerShell (3.0+), e.g.

Invoke-WebRequest -OutFile openapi-generator-cli.jar https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli/6.5.0/openapi-generator-cli-6.5.0.jar

After downloading the JAR, run java -jar openapi-generator-cli.jar help to show the usage.

For Mac users, please make sure Java 8 is installed (Tips: run java -version to check the version), and export JAVA_HOME in order to use the supported Java version:

export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
export PATH=${JAVA_HOME}/bin:$PATH

Launcher Script

One downside to manual jar downloads is that you don't keep up-to-date with the latest released version. We have a Bash launcher script at bin/utils/openapi-generator.cli.sh which resolves this issue.

To install the launcher script, copy the contents of the script to a location on your path and make the script executable.

An example of setting this up (NOTE: Always evaluate scripts curled from external systems before executing them).

mkdir -p ~/bin/openapitools
curl https://raw.githubusercontent.com/OpenAPITools/openapi-generator/master/bin/utils/openapi-generator-cli.sh > ~/bin/openapitools/openapi-generator-cli
chmod u+x ~/bin/openapitools/openapi-generator-cli
export PATH=$PATH:~/bin/openapitools/

Now, openapi-generator-cli is "installed". On invocation, it will query the GitHub repository for the most recently released version. If this matches the last downloaded jar, it will execute as normal. If a newer version is found, the script will download the latest release and execute it.

If you need to invoke an older version of the generator, you can define the variable OPENAPI_GENERATOR_VERSION either ad hoc or globally. You can export this variable if you'd like to persist a specific release version.

Examples:

# Execute latest released openapi-generator-cli
openapi-generator-cli version

# Execute version 4.1.0 for the current invocation, regardless of the latest released version
OPENAPI_GENERATOR_VERSION=4.1.0 openapi-generator-cli version

# Execute version 4.1.0-SNAPSHOT for the current invocation
OPENAPI_GENERATOR_VERSION=4.1.0-SNAPSHOT openapi-generator-cli version

# Execute version 4.0.2 for every invocation in the current shell session
export OPENAPI_GENERATOR_VERSION=4.0.2
openapi-generator-cli version # is 4.0.2
openapi-generator-cli version # is also 4.0.2

# To "install" a specific version, set the variable in .bashrc/.bash_profile
echo "export OPENAPI_GENERATOR_VERSION=4.0.2" >> ~/.bashrc
source ~/.bashrc
openapi-generator-cli version # is always 4.0.2, unless any of the above overrides are done ad hoc

1.4 - Build Projects

To build from source, you need the following installed and available in your $PATH:

After cloning the project, you can build it from source with this command:

mvn clean install

If you don't have maven installed, you may directly use the included maven wrapper, and build with the command:

./mvnw clean install

Nix users

If you're a nix user, you can enter OpenAPI Generator shell, by typing:

nix develop

It will enter a shell with Java 8 and Maven installed.

Direnv supports automatically loading of the nix developer shell, so if you're using direnv too, type:

direnv allow

and have java and mvn set up with correct versions each time you enter project directory.

The default build contains minimal static analysis (via CheckStyle). To run your build with PMD and Spotbugs, use the static-analysis profile:

mvn -Pstatic-analysis clean install

1.5 - Homebrew

To install, run brew install openapi-generator

Here is an example usage to generate a Ruby client:

openapi-generator generate -i https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml -g ruby -o /tmp/test/

To reinstall with the latest master, run brew uninstall openapi-generator && brew install --HEAD openapi-generator

To install OpenJDK (pre-requisites), please run

brew tap AdoptOpenJDK/openjdk
brew install --cask adoptopenjdk12
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-12.0.2.jdk/Contents/Home/

To install Maven, please run

brew install maven

1.6 - Docker

Public Pre-built Docker images

OpenAPI Generator CLI Docker Image

The OpenAPI Generator image acts as a standalone executable. It can be used as an alternative to installing via homebrew, or for developers who are unable to install Java or upgrade the installed version.

To generate code with this image, you'll need to mount a local location as a volume.

Example:

docker run --rm -v "${PWD}:/local" openapitools/openapi-generator-cli generate \
    -i https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml \
    -g go \
    -o /local/out/go

The generated code will be located under ./out/go in the current directory.

OpenAPI Generator Online Docker Image

The openapi-generator-online image can act as a self-hosted web application and API for generating code. This container can be incorporated into a CI pipeline, and requires at least two HTTP requests and some docker orchestration to access generated code.

Example usage:

# Start container at port 8888 and save the container id
> CID=$(docker run -d -p 8888:8080 openapitools/openapi-generator-online)

# allow for startup
> sleep 10

# Get the IP of the running container (optional)
GEN_IP=$(docker inspect --format '{{.NetworkSettings.IPAddress}}'  $CID)

# Execute an HTTP request to generate a Ruby client
> curl -X POST --header 'Content-Type: application/json' --header 'Accept: application/json' \
-d '{"openAPIUrl": "https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml"}' \
'http://localhost:8888/api/gen/clients/ruby'

{"code":"c2d483.3.4672-40e9-91df-b9ffd18d22b8","link":"http://localhost:8888/api/gen/download/c2d483.3.4672-40e9-91df-b9ffd18d22b8"}

# Download the generated zip file
> wget http://localhost:8888/api/gen/download/c2d483.3.4672-40e9-91df-b9ffd18d22b8

# Unzip the file
> unzip c2d483.3.4672-40e9-91df-b9ffd18d22b8

# Shutdown the openapi generator image
> docker stop $CID && docker rm $CID

Development in docker

You can use run-in-docker.sh to do all development. This script maps your local repository to /gen in the docker container. It also maps ~/.m2/repository to the appropriate container location.

To execute mvn package:

git clone https://github.com/openapitools/openapi-generator
cd openapi-generator
./run-in-docker.sh mvn package

Build artifacts are now accessible in your working directory.

Once built, run-in-docker.sh will act as an executable for openapi-generator-cli. To generate code, you'll need to output to a directory under /gen (e.g. /gen/out). For example:

./run-in-docker.sh help # Executes 'help' command for openapi-generator-cli
./run-in-docker.sh list # Executes 'list' command for openapi-generator-cli
./run-in-docker.sh /gen/bin/go-petstore.sh  # Builds the Go client
./run-in-docker.sh generate -i modules/openapi-generator/src/test/resources/3_0/petstore.yaml \
    -g go -o /gen/out/go-petstore -p packageName=petstore # generates go client, outputs locally to ./out/go-petstore
Troubleshooting

If an error like this occurs, just execute the mvn clean install -U command:

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.19.1:test (default-test) on project openapi-generator: A type incompatibility occurred while executing org.apache.maven.plugins:maven-surefire-plugin:2.19.1:test: java.lang.ExceptionInInitializerError cannot be cast to java.io.IOException

./run-in-docker.sh mvn clean install -U

Failed to execute goal org.fortasoft:gradle-maven-plugin:1.0.8:invoke (default) on project openapi-generator-gradle-plugin-mvn-wrapper: org.gradle.tooling.BuildException: Could not execute build using Gradle distribution 'https://services.gradle.org/distributions/gradle-4.7-bin.zip'

Right now: no solution for this one :|

Run Docker in Vagrant

Prerequisite: install Vagrant and VirtualBox.

git clone https://github.com/openapitools/openapi-generator.git
cd openapi-generator
vagrant up
vagrant ssh
cd /vagrant
./run-in-docker.sh mvn package

1.7 - NPM

There is also an NPM package wrapper available for different platforms (e.g. Linux, Mac, Windows). (JVM is still required) Please see the project's README there for more information.

Install it globally to get the CLI available on the command line:

npm install @openapitools/openapi-generator-cli -g
openapi-generator-cli version

To use a specific version of "openapi-generator-cli"

openapi-generator-cli version-manager set 6.5.0

Or install it as dev-dependency:

npm install @openapitools/openapi-generator-cli -D

2 - Getting Started

To generate a PHP client for petstore.yaml, please run the following

git clone https://github.com/openapitools/openapi-generator
cd openapi-generator
mvn clean package
java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar generate \
   -i https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml \
   -g php \
   -o /var/tmp/php_api_client

(if you're on Windows, replace the last command with java -jar modules\openapi-generator-cli\target\openapi-generator-cli.jar generate -i https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml -g php -o c:\temp\php_api_client)

You can also download the JAR (latest release) directly from maven.org

To get a list of general options available, please run java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar help generate

To get a list of PHP specified options (which can be passed to the generator with a config file via the -c option), please run java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar config-help -g php

3 - Usage

To generate a sample client library

You can build a client against the Petstore API as follows:

./bin/generate-samples.sh ./bin/configs/java-okhttp-gson.yaml

(On Windows, please install GIT Bash for Windows to run the command above)

This script uses the default library, which is okhttp-gson. It will run the generator with this command:

java -jar modules/openapi-generator-cli/target/openapi-generator-cli.jar generate \
  -i https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml \
  -g java \
  -t modules/openapi-generator/src/main/resources/Java \
  --additional-properties artifactId=petstore-okhttp-gson,hideGenerationTimestamp:true \
  -o samples/client/petstore/java/okhttp-gson

with a number of options. The java options are documented here.

You can also get the options with the help generate command (below only shows partial results):

NAME
        openapi-generator-cli generate - Generate code with the specified
        generator.

SYNOPSIS
        openapi-generator-cli generate
                [(-a <authorization> | --auth <authorization>)]
                [--api-name-suffix <api name suffix>] [--api-package <api package>]
                [--artifact-id <artifact id>] [--artifact-version <artifact version>]
                [(-c <configuration file> | --config <configuration file>)] [--dry-run]
                [(-e <templating engine> | --engine <templating engine>)]
                [--enable-post-process-file]
                [(-g <generator name> | --generator-name <generator name>)]
                [--generate-alias-as-model] [--git-host <git host>]
                [--git-repo-id <git repo id>] [--git-user-id <git user id>]
                [--global-property <global properties>...] [--group-id <group id>]
                [--http-user-agent <http user agent>]
                [(-i <spec file> | --input-spec <spec file>)]
                [--ignore-file-override <ignore file override location>]
                [--import-mappings <import mappings>...]
                [--instantiation-types <instantiation types>...]
                [--invoker-package <invoker package>]
                [--language-specific-primitives <language specific primitives>...]
                [--legacy-discriminator-behavior] [--library <library>]
                [--log-to-stderr] [--minimal-update]
                [--model-name-prefix <model name prefix>]
                [--model-name-suffix <model name suffix>]
                [--model-package <model package>]
                [(-o <output directory> | --output <output directory>)] [(-p <additional properties> | --additional-properties <additional properties>)...]
                [--package-name <package name>] [--release-note <release note>]
                [--remove-operation-id-prefix]
                [--reserved-words-mappings <reserved word mappings>...]
                [(-s | --skip-overwrite)] [--server-variables <server variables>...]
                [--skip-validate-spec] [--strict-spec <true/false strict behavior>]
                [(-t <template directory> | --template-dir <template directory>)]
                [--type-mappings <type mappings>...] [(-v | --verbose)]

OPTIONS
        -a <authorization>, --auth <authorization>
            adds authorization headers when fetching the OpenAPI definitions
            remotely. Pass in a URL-encoded string of name:header with a comma
            separating multiple values

...... (results omitted)

        -v, --verbose
            verbose mode

You can then compile and run the client, as well as unit tests against it:

cd samples/client/petstore/java/okhttp-gson
mvn package

Other generators have samples too.

3.1 - Customization

Please refer to customization.md on how to customize the output (e.g. package name, version)

3.2 - Workflow Integration (Maven, Gradle, Github, CI/CD)

Please refer to integration.md on how to integrate OpenAPI generator with Maven, Gradle, sbt, Bazel, Github and CI/CD.

3.3 - Online OpenAPI generator

Here are the public online services:

The server is sponsored by Linode Linode Logo

(These services are beta and do not have any guarantee on service level)

Please refer to online.md on how to run and use the openapi-generator-online - a web service for openapi-generator.

3.4 - License information on Generated Code

The OpenAPI Generator project is intended as a benefit for users of the Open API Specification. The project itself has the License as specified. In addition, please understand the following points:

  • The templates included with this project are subject to the License.
  • Generated code is intentionally not subject to the parent project license

When code is generated from this project, it shall be considered AS IS and owned by the user of the software. There are no warranties--expressed or implied--for generated code. You can do what you wish with it, and once generated, the code is your responsibility and subject to the licensing terms that you deem appropriate.

3.5 - IDE Integration

Here is a list of community-contributed IDE plug-ins that integrate with OpenAPI Generator:

4 - Companies/Projects using OpenAPI Generator

Here are some companies/projects (alphabetical order) using OpenAPI Generator in production. To add your company/project to the list, please visit README.md and click on the icon to edit the page.

5 - Presentations/Videos/Tutorials/Books

6 - About Us

What's the design philosophy or principle behind OpenAPI Generator?

We focus on developer experience. The generators should produce code, config, documentation, and more that are easily understandable and consumable by users. We focused on simple use cases to start with (bottom-up approach). Since then the project and the community have grown a lot: 300k weekly downloads via NPM CLI wrapper, 20M downloads via openapi-generator-cli docker image just to highlight a few. We've gradually supported more features (e.g. oneOf, anyOf introduced in OpenAPI 3.0) in various generators and we will continue this approach to deliver something based on our understanding of user demand and what they want, and continue to add support of new features introduced in OpenAPI specification (such as v3.1 and future versions of the OpenAPI specification).

6.1 - OpenAPI Generator Core Team

OpenAPI Generator core team members are contributors who have been making significant contributions (review issues, fix bugs, make enhancements, etc) to the project on a regular basis.

Core Team Members

❤️ = Link to support the contributor directly

Template Creator

NOTE: Embedded templates are only supported in Mustache format. Support for all other formats is experimental and subject to change at any time.

Here is a list of template creators:

  • API Clients:
    • Ada: @stcarrez
    • Apex: @asnelling
    • Bash: @bkryza
    • C: @PowerOfCreation @zhemant ❤️
    • C++ REST: @Danielku15
    • C++ Tiny: @AndersSpringborg @kaareHH @michelealbano @mkakbas
    • C++ UE4: @Kahncode
    • C# (.NET 2.0): @who
    • C# (.NET Standard 1.3 ): @Gronsak
    • C# (.NET 4.5 refactored): @jimschubert ❤️
    • C# (GenericHost): @devhl-labs
    • C# (HttpClient): @Blackclaws
    • Clojure: @xhh
    • Crystal: @wing328
    • Dart: @yissachar
    • Dart (refactor): @joernahrens
    • Dart 2: @swipesight
    • Dart (Jaguar): @jaumard
    • Dart (Dio): @josh-burton
    • Elixir: @niku
    • Elm: @eriktim
    • Eiffel: @jvelilla
    • Erlang: @tsloughter
    • Erlang (PropEr): @jfacorro @robertoaloi
    • Groovy: @victorgit
    • Go: @wing328 ❤️
    • Go (rewritten in 2.3.0): @antihax
    • Haskell (http-client): @jonschoning
    • Java (Feign): @davidkiss
    • Java (Retrofit): @0legg
    • Java (Retrofit2): @emilianobonassi
    • Java (Jersey2): @xhh
    • Java (okhttp-gson): @xhh
    • Java (RestTemplate): @nbruno
    • Java (Spring 5 WebClient): @daonomic
    • Java (RESTEasy): @gayathrigs
    • Java (Vertx): @lopesmcc
    • Java (Google APIs Client Library): @charlescapps
    • Java (Rest-assured): @viclovsky
    • Java (Java 11 Native HTTP client): @bbdouglas
    • Java (Apache HttpClient 5.x): @harrywhite4 @andrevegas
    • Java (Helidon): @spericas @tjquinno @tvallin
    • Javascript/NodeJS: @jfiala
    • JavaScript (Apollo DataSource): @erithmetic
    • JavaScript (Closure-annotated Angular) @achew22
    • JavaScript (Flow types) @jaypea
    • Jetbrains HTTP Client : @jlengrand
    • JMeter: @davidkiss
    • Julia: @tanmaykm
    • Kotlin: @jimschubert ❤️
    • Kotlin (MultiPlatform): @andrewemery
    • Kotlin (Volley): @alisters
    • Lua: @daurnimator
    • Nim: @hokamoto
    • OCaml: @cgensoul
    • Perl: @wing328 ❤️
    • PHP (Guzzle): @baartosz
    • PHP (with Data Transfer): @Articus
    • PowerShell: @beatcracker
    • PowerShell (refactored in 5.0.0): @wing328
    • Python: @spacether ❤️
    • Python-Experimental: @spacether ❤️
    • R: @ramnov
    • Ruby (Faraday): @meganemura @dkliban
    • Rust: @farcaller
    • Rust (rust-server): @metaswitch
    • Scala (scalaz & http4s): @tbrown1979
    • Scala (Akka): @cchafer
    • Scala (sttp): @chameleon82
    • Swift: @tkqubo
    • Swift 3: @hexelon
    • Swift 4: @ehyche
    • Swift 5: @4brunu
    • TypeScript (Angular1): @mhardorf
    • TypeScript (Angular2): @roni-frantchi
    • TypeScript (Angular6): @akehir
    • TypeScript (Angular7): @topce
    • TypeScript (Axios): @nicokoenig
    • TypeScript (Fetch): @leonyu
    • TypeScript (Inversify): @gualtierim
    • TypeScript (jQuery): @bherila
    • TypeScript (Nestjs): @vfrank66
    • TypeScript (Node): @mhardorf
    • TypeScript (Rxjs): @denyo
    • TypeScript (redux-query): @petejohansonxo
  • Server Stubs
    • Ada: @stcarrez
    • C# ASP.NET 5: @jimschubert ❤️
    • C# ASP.NET Core 3.0: @A-Joshi
    • C# APS.NET Core 3.1: @phatcher
    • C# Azure functions: @Abrhm7786
    • C# NancyFX: @mstefaniuk
    • C++ (Qt5 QHttpEngine): @etherealjoy
    • C++ Pistache: @sebymiano
    • C++ Restbed: @stkrwork
    • Erlang Server: @galaxie
    • F# (Giraffe) Server: @nmfisher
    • Go Server: @guohuang
    • Go Server (refactored in 7.0.0): @lwj5
    • Go (Echo) Server: @ph4r5h4d
    • Go (Gin) Server: @kemokemo
    • GraphQL Express Server: @renepardon
    • Haskell Servant: @algas
    • Haskell Yesod: @yotsuya
    • Java Camel: @carnevalegiacomo
    • Java MSF4J: @sanjeewa-malalgoda
    • Java Spring Boot: @diyfr
    • Java Undertow: @stevehu
    • Java Play Framework: @JFCote
    • Java PKMST: @anshu2185 @sanshuman @rkumar-pk @ninodpillai
    • Java Vert.x: @lwlee2608
    • Java Micronaut: @andriy-dmytruk
    • Java Helidon: @spericas @tjquinno @tvallin
    • JAX-RS RestEasy: @chameleon82
    • JAX-RS CXF: @hiveship
    • JAX-RS CXF (CDI): @nickcmaynard
    • JAX-RS RestEasy (JBoss EAP): @jfiala
    • Julia: @tanmaykm
    • Kotlin: @jimschubert ❤️
    • Kotlin (Spring Boot): @dr4ke616
    • Kotlin (Vertx): @Wooyme
    • Kotlin (JAX-RS): @anttileppa
    • NodeJS Express: @YishTish
    • PHP Laravel: @renepardon
    • PHP Lumen: @abcsun
    • PHP Mezzio (with Path Handler): @Articus
    • PHP Slim: @jfastnacht
    • PHP Slim4: @ybelenko
    • PHP Symfony: @ksm2
    • PHP Symfony6: @BenjaminHae
    • Python FastAPI: @krjakbrjak
    • Python AIOHTTP:
    • Ruby on Rails 5: @zlx
    • Rust (rust-server): @metaswitch
    • Scala Akka: @Bouillie
    • Scala Finch: @jimschubert ❤️
    • Scala Lagom: @gmkumar2005
    • Scala Play: @adigerber
  • Documentation
    • AsciiDoc: @man-at-home
    • HTML Doc 2: @jhitchcock
    • Confluence Wiki: @jhitchcock
    • PlantUML: @pburls
  • Configuration
    • Apache2: @stkrwork
    • k6: @mostafa
  • Schema
    • Avro: @sgadouar
    • GraphQL: @wing328 ❤️
    • Ktorm: @Luiz-Monad
    • MySQL: @ybelenko
    • Protocol Buffer: @wing328
    • WSDL @adessoDpd

❤️ = Link to support the contributor directly

How to join the core team

Here are the requirements to become a core team member:

To join the core team, please reach out to [email protected] for more information.

To become a Template Creator, simply submit a PR for new API client (e.g. Rust, Elixir) or server stub (e.g. Ruby Grape) generator.

6.2 - OpenAPI Generator Technical Committee

Members of the OpenAPI Generator technical committee shoulder the following responsibilities:

  • Provides guidance and direction to other users
  • Reviews pull requests and issues
  • Improves the generator by making enhancements, fixing bugs or updating documentations
  • Sets the technical direction of the generator

Who is eligible? Those who want to join must have at least 3 PRs merged into a generator. (Exceptions can be granted to template creators or contributors who have made a lot of code changes with less than 3 merged PRs)

If you want to join the committee, please kindly apply by sending an email to [email protected] with your Github ID.

Members of Technical Committee

Languages/Generators Member (join date)
ActionScript
Ada @stcarrez (2018/02) @michelealbano (2018/02)
Android @jaz-ah (2017/09)
Apex
Bash @frol (2017/07) @bkryza (2017/08) @kenjones-cisco (2017/09)
C @zhemant (2018/11) @ityuhui (2019/12) @michelealbano (2020/03)
C++ @ravinikam (2017/07) @stkrwork (2017/07) @etherealjoy (2018/02) @martindelille (2018/03) @muttleyxd (2019/08)
C# @mandrean (2017/08) @frankyjuang (2019/09) @shibayan (2020/02) @Blackclaws (2021/03) @lucamazzanti (2021/05)
Clojure
Crystal @cyangle (2021/01)
Dart @jaumard (2018/09) @josh-burton (2019/12) @amondnet (2019/12) @sbu-WBT (2020/12) @kuhnroyal (2020/12) @agilob (2020/12) @ahmednfwela (2021/08)
Eiffel @jvelilla (2017/09)
Elixir @mrmstn (2018/12)
Elm @eriktim (2018/09)
Erlang @tsloughter (2017/11) @jfacorro (2018/10) @robertoaloi (2018/10)
F# @nmfisher (2019/05)
Go @antihax (2017/11) @grokify (2018/07) @kemokemo (2018/09) @jirikuncar (2021/01) @ph4r5h4d (2021/04) @lwj5 (2023/04)
GraphQL @renepardon (2018/12)
Groovy
Haskell
Java @bbdouglas (2017/07) @sreeshas (2017/08) @jfiala (2017/08) @lukoyanov (2017/09) @cbornet (2017/09) @jeff9finger (2018/01) @karismann (2019/03) @Zomzog (2019/04) @lwlee2608 (2019/10)
Java Spring @cachescrubber (2022/02) @welshm (2022/02) @MelleD (2022/02) @atextor (2022/02) @manedev79 (2022/02) @javisst (2022/02) @borsch (2022/02) @banlevente (2022/02) @Zomzog (2022/09)
JMeter @kannkyo (2021/01)
Jetbrains HTTP Client @jlengrand (2023/01)
Julia @tanmaykm (2023/01)
Kotlin @jimschubert (2017/09) ❤️, @dr4ke616 (2018/08) @karismann (2019/03) @Zomzog (2019/04) @andrewemery (2019/10) @4brunu (2019/11) @yutaka0m (2020/03)
Lua @daurnimator (2017/08)
Nim
NodeJS/Javascript @CodeNinjai (2017/07) @frol (2017/07) @cliffano (2017/07)
ObjC
OCaml @cgensoul (2019/08)
Perl @wing328 (2017/07) ❤️ @yue9944882 (2019/06)
PHP @jebentier (2017/07), @dkarlovi (2017/07), @mandrean (2017/08), @jfastnacht (2017/09), @ybelenko (2018/07), @renepardon (2018/12)
PowerShell @wing328 (2020/05)
Python @spacether (2019/11) ❤️ @krjakbrjak (2023/02)
R @Ramanth (2019/07) @saigiridhar21 (2019/07)
Ruby @cliffano (2017/07) @zlx (2017/09) @autopp (2019/02)
Rust @frol (2017/07) @farcaller (2017/08) @richardwhiuk (2019/07) @paladinzh (2020/05) @jacob-pro (2022/10)
Scala @clasnake (2017/07), @jimschubert (2017/09) ❤️, @shijinkui (2018/01), @ramzimaalej (2018/03), @chameleon82 (2020/03), @Bouillie (2020/04)
Swift @jgavris (2017/07) @ehyche (2017/08) @Edubits (2017/09) @jaz-ah (2017/09) @4brunu (2019/11)
TypeScript @TiFu (2017/07) @taxpon (2017/07) @sebastianhaas (2017/07) @kenisteward (2017/07) @Vrolijkx (2017/09) @macjohnny (2018/01) @topce (2018/10) @akehir (2019/07) @petejohansonxo (2019/11) @amakhrov (2020/02) @davidgamero (2022/03) @mkusaka (2022/04)

Past Members of Technical Committee:

Languages/Generators Member (join date)
Python @taxpon (2017/07) @frol (2017/07) @mbohlool (2017/07) @cbornet (2017/09) @kenjones-cisco (2017/11) @tomplus (2018/10) @arun-nalla (2019/11)

❤️ = Link to support the contributor directly

6.3 - History of OpenAPI Generator

OpenAPI Generator is a fork of Swagger Codegen. In view of the issues with the Swagger Codegen 3.0.0 (beta) release and the disagreement on the project's direction, more than 40 top contributors and template creators of Swagger Codegen decided to fork Swagger Codegen and maintain a community-driven version called "OpenAPI Generator". Please refer to the Q&A for more information.

Founding Members (alphabetical order):

❤️ = Link to support the contributor directly

7 - License

Copyright 2018 OpenAPI-Generator Contributors (https://openapi-generator.tech) Copyright 2018 SmartBear Software

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

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  • Java 88.8%
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  • TypeScript 2.4%
  • Kotlin 1.2%
  • Shell 1.2%
  • PHP 0.9%
  • Other 1.9%