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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:star::star::star: If you would like to contribute, please refer to [guidelines](CONTRIBUTING.md) and a list of [open tasks](https://github.com/openapitools/openapi-generator/issues?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22). :star::star::star:
:bangbang: To migrate from Swagger Codegen to OpenAPI Generator, please refer to the [migration guide](docs/migration-from-swagger-codegen.md) :bangbang:
:notebook_with_decorative_cover: For more information, please refer to the [Wiki page](https://github.com/openapitools/openapi-generator/wiki) and [FAQ](https://github.com/openapitools/openapi-generator/wiki/FAQ) :notebook_with_decorative_cover:
:notebook_with_decorative_cover: The eBook [A Beginner's Guide to Code Generation for REST APIs](https://gum.co/openapi_generator_ebook) is a good starting point for beginners :notebook_with_decorative_cover:
:warning: 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](https://en.wikipedia.org/wiki/Code_injection)). For security vulnerabilities, please contact [team@openapitools.org](mailto:team@openapitools.org). :warning:
:bangbang: Both "OpenAPI Tools" (https://OpenAPITools.org - the parent organization of OpenAPI Generator) and "OpenAPI Generator" are not affiliated with OpenAPI Initiative (OAI) :bangbang:
If you find OpenAPI Generator useful for work, please consider asking your company to support this Open Source project by [becoming a sponsor](https://opencollective.com/openapi_generator). You can also individually sponsor the project by [becoming a backer](https://opencollective.com/openapi_generator).
#### Thank you GoDaddy for sponsoring the domain names, Linode for sponsoring the VPS, Checkly for sponsoring the API monitoring and Gradle for sponsoring Develocity
OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an [OpenAPI Spec](https://github.com/OAI/OpenAPI-Specification) (both 2.0 and 3.0 are supported). Currently, the following languages/frameworks are supported:
- [Thank you to our bronze sponsors!](#thank-you-to-our-bronze-sponsors)
- [Thank you GoDaddy for sponsoring the domain names, Linode for sponsoring the VPS, Checkly for sponsoring the API monitoring and Gradle for sponsoring Develocity](#thank-you-godaddy-for-sponsoring-the-domain-names-linode-for-sponsoring-the-vps-checkly-for-sponsoring-the-api-monitoring-and-gradle-for-sponsoring-develocity)
- [Overview](#overview)
- [Table of contents](#table-of-contents)
- [1 - Installation](#1---installation)
- [1.1 - Compatibility](#11---compatibility)
- [1.2 - Artifacts on Maven Central](#12---artifacts-on-maven-central)
The OpenAPI Specification has undergone 3 revisions since initial creation in 2010. The openapi-generator project has the following compatibilities with the OpenAPI Specification:
For decommissioned generators/libraries/frameworks, please refer to [the "Decommission" label](https://github.com/OpenAPITools/openapi-generator/issues?q=label%3ADecommission+is%3Amerged+) in the pull request page.
See the different versions of the [openapi-generator](https://search.maven.org/artifact/org.openapitools/openapi-generator) artifact available on maven central.
See the different versions of the [openapi-generator-cli](https://search.maven.org/artifact/org.openapitools/openapi-generator-cli) artifact available on maven central.
* See the different versions of the [openapi-generator-maven-plugin](https://search.maven.org/artifact/org.openapitools/openapi-generator-maven-plugin) artifact available on maven central.
* See the different versions of the [openapi-generator-gradle-plugin](https://search.maven.org/artifact/org.openapitools/openapi-generator-gradle-plugin) artifact available on maven central.
For **Windows** users, you will need to install [wget](http://gnuwin32.sourceforge.net/packages/wget.htm) or you can use Invoke-WebRequest in PowerShell (3.0+), e.g.
For Mac users, please make sure Java 11 is installed (Tips: run `java -version` to check the version), and export `JAVA_HOME` in order to use the supported Java version:
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](./bin/utils/openapi-generator-cli.sh) which resolves this issue.
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.
- [https://hub.docker.com/r/openapitools/openapi-generator-online/](https://hub.docker.com/r/openapitools/openapi-generator-online/) (official web service)
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.
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.
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:
> 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
> 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'
There is also an [NPM package wrapper](https://www.npmjs.com/package/@openapitools/openapi-generator-cli) available for different platforms (e.g. Linux, Mac, Windows). (JVM is still required)
Please see the [project's README](https://github.com/openapitools/openapi-generator-cli) there for more information.
You can use [locally built JARs](https://github.com/OpenAPITools/openapi-generator-cli?tab=readme-ov-file#use-locally-built-jar) or [`SNAPSHOT` versions](https://github.com/OpenAPITools/openapi-generator-cli?tab=readme-ov-file#use-nightly-snapshot-build) as well.
To generate a PHP client for [petstore.yaml](https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml), please run the following
(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](https://repo1.maven.org/maven2/org/openapitools/openapi-generator-cli/7.19.0/openapi-generator-cli-7.19.0.jar)
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`
You can build a client against the [Petstore API](https://raw.githubusercontent.com/openapitools/openapi-generator/master/modules/openapi-generator/src/test/resources/3_0/petstore.yaml) as follows:
The server is sponsored by [Linode](https://www.linode.com/) [](https://www.linode.com/)
(These services are beta and do not have any guarantee on service level)
The OpenAPI Generator project is intended as a benefit for users of the Open API Specification. The project itself has the [License](#7---license) as specified. In addition, please understand the following points:
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.
- Eclipse: [Codewind OpenAPI Tools for Eclipse](https://www.eclipse.org/codewind/open-api-tools-for-eclipse.html) by [IBM](https://www.ibm.com)
- IntelliJ IDEA: [OpenAPI Generator](https://plugins.jetbrains.com/plugin/8433-openapi-generator) by [Jim Schubert](https://jimschubert.us/#/)
- IntelliJ IDEA: [Senya Editor](https://plugins.jetbrains.com/plugin/10690-senya-editor) by [senya.io](https://senya.io)
- [RepreZen API Studio](https://www.reprezen.com/)
- Visual Studio: [REST API Client Code Generator](https://marketplace.visualstudio.com/items?itemName=ChristianResmaHelle.ApiClientCodeGenerator) by [Christian Resma Helle](https://christian-helle.blogspot.com/)
- Visual Studio Code: [Codewind OpenAPI Tools](https://marketplace.visualstudio.com/items?itemName=IBM.codewind-openapi-tools) by [IBM](https://marketplace.visualstudio.com/publishers/IBM)
Here are some companies/projects (alphabetical order) using OpenAPI Generator in production. To add your company/project to the list, please visit [README.md](README.md) and click on the icon to edit the page.
- 2018/05/12 - [OpenAPI Generator - community drivenで成長するコードジェネレータ](https://ackintosh.github.io/blog/2018/05/12/openapi-generator/) by [中野暁人](https://github.com/ackintosh)
- 2018/05/15 - [Starting a new open-source project](http://jmini.github.io/blog/2018/2018-05-15_new-open-source-project.html) by [Jeremie Bresson](https://github.com/jmini)
- 2018/05/15 - [REST API仕様からAPIクライアントやスタブサーバを自動生成する「OpenAPI Generator」オープンソースで公開。Swagger Codegenからのフォーク](https://www.publickey1.jp/blog/18/rest_apiapiopenapi_generatorswagger_generator.html) by [Publickey](https://www.publickey1.jp)
- 2018/06/08 - [Swagger Codegen is now OpenAPI Generator](https://angular.schule/blog/2018-06-swagger-codegen-is-now-openapi-generator) by [JohannesHoppe](https://github.com/JohannesHoppe)
- 2018/06/21 - [Connect your JHipster apps to the world of APIs with OpenAPI and gRPC](https://fr.slideshare.net/chbornet/jhipster-conf-2018-connect-your-jhipster-apps-to-the-world-of-apis-with-openapi-and-grpc) by [Christophe Bornet](https://github.com/cbornet) at [JHipster Conf 2018](https://jhipster-conf.github.io/)
- 2018/06/27 - [Lessons Learned from Leading an Open-Source Project Supporting 30+ Programming Languages](https://speakerdeck.com/wing328/lessons-learned-from-leading-an-open-source-project-supporting-30-plus-programming-languages) - [William Cheng](https://github.com/wing328) at [LinuxCon + ContainerCon + CloudOpen China 2018](http://bit.ly/2waDKKX)
- 2018/09/12 - [RepreZen and OpenAPI 3.0: Now is the Time](https://www.reprezen.com/blog/reprezen-openapi-3.0-upgrade-now-is-the-time) by [Miles Daffin](https://www.reprezen.com/blog/author/miles-daffin)
- 2018/11/18 - [Generating PHP library code from OpenAPI](https://lornajane.net/posts/2018/generating-php-library-code-from-openapi) by [Lorna Jane](https://lornajane.net/) at [LORNAJANE Blog](https://lornajane.net/blog)
- 2018/11/19 - [OpenAPIs are everywhere](https://youtu.be/-lDot4Yn7Dg) by [Jeremie Bresson (Unblu)](https://github.com/jmini) at [EclipseCon Europe 2018](https://www.eclipsecon.org/europe2018)
- 2019/01/03 - [Calling a Swagger service from Apex using openapi-generator](https://lekkimworld.com/2019/01/03/calling-a-swagger-service-from-apex-using-openapi-generator/) by [Mikkel Flindt Heisterberg](https://lekkimworld.com)
- 2019/01/20 - [Contract-First API Development with OpenAPI Generator and Connexion](https://medium.com/commencis/contract-first-api-development-with-openapi-generator-and-connexion-b21bbf2f9244) by [Anil Can Aydin](https://github.com/anlcnydn)
- 2019/01/30 - [Rapid Application Development With API First Approach Using Open-API Generator](https://dzone.com/articles/rapid-api-development-using-open-api-generator) by [Milan Sonkar](https://dzone.com/users/828329/milan_sonkar.html)
- 2019/02/26 - [Building API Services: A Beginner’s Guide](https://medium.com/google-cloud/building-api-services-a-beginners-guide-7274ae4c547f) by [Ratros Y.](https://medium.com/@ratrosy) in [Google Cloud Platform Blog](https://medium.com/google-cloud)
- 2019/02/26 - [Building APIs with OpenAPI: Continued](https://medium.com/@ratrosy/building-apis-with-openapi-continued-5d0faaed32eb) by [Ratros Y.](https://medium.com/@ratrosy) in [Google Cloud Platform Blog](https://medium.com/google-cloud)
- 2019-03-16 - [A Quick introduction to manual OpenAPI V3](https://vadosware.io/post/quick-intro-to-manual-openapi-v3/) by [vados](https://github.com/t3hmrman) at [VADOSWARE](https://vadosware.io)
- 2019-03-25 - [Access any REST service with the SAP S/4HANA Cloud SDK](https://blogs.sap.com/2019/03/25/integrate-sap-s4hana-cloud-sdk-with-open-api/) by [Alexander Duemont](https://people.sap.com/alexander.duemont)
- 2019-04-18 - [How to use OpenAPI3 for API developer (RubyKaigi 2019)](https://speakerdeck.com/ota42y/how-to-use-openapi3-for-api-developer) by [@ota42y](https://twitter.com/ota42y) at [RubyKaigi 2019](https://rubykaigi.org/2019)
- 2019-05-01 - [Design and generate a REST API from Swagger / OpenAPI in Java, Python, C# and more](https://simply-how.com/design-and-generate-api-code-from-openapi) by [Simply How](https://simply-how.com/)
- 2019-05-17 - [Generate Spring Boot REST API using Swagger/OpenAPI](https://www.47northlabs.com/knowledge-base/generate-spring-boot-rest-api-using-swagger-openapi/) by [Antonie Zafirov](https://www.47northlabs.com/author/antonie-zafirov/)
- 2019-06-28 [Codewind OpenAPI Tools](https://marketplace.eclipse.org/content/codewind-openapi-tools) in [Eclipse Marketplace](https://marketplace.eclipse.org/) by IBM
- 2019-06-29 [Codewind OpenAPI Tools](https://marketplace.visualstudio.com/items?itemName=IBM.codewind-openapi-tools) in [Visual Studio Marketplace](https://marketplace.visualstudio.com/) by IBM
- 2019-07-19 - [Developer Experience (DX) for Open-Source Projects: How to Engage Developers and Build a Growing Developer Community](https://speakerdeck.com/wing328/developer-experience-dx-for-open-source-projects-english-japanese) by [William Cheng](https://twitter.com/wing328), [中野暁人](https://github.com/ackintosh) at [Open Source Summit Japan 2019](https://events.linuxfoundation.org/events/open-source-summit-japan-2019/)
- 2019-08-14 - [Our OpenAPI journey with Standardizing SDKs](https://bitmovin.com/our-openapi-journey-with-standardizing-sdks/) by [Sebastian Burgstaller](https://bitmovin.com/author/sburgstaller/) at [Bitmovin](https://www.bitmovin.com)
- 2019-08-29 - [OpenAPI初探](https://cloud.tencent.com/developer/article/1495986) by [peakxie](https://cloud.tencent.com/developer/user/1113152) at [腾讯云社区](https://cloud.tencent.com/developer)
- 2019-08-29 - [全面进化：Kubernetes CRD 1.16 GA前瞻](https://www.servicemesher.com/blog/kubernetes-1.16-crd-ga-preview/) by [Min Kim](https://github.com/yue9944882) at [ServiceMesher Blog](https://www.servicemesher.com/blog/)
- 2019-09-01 - [Creating a PHP-Slim server using OpenAPI (Youtube video)](https://www.youtube.com/watch?v=5cJtbIrsYkg) by [Daniel Persson](https://www.youtube.com/channel/UCnG-TN23lswO6QbvWhMtxpA)
- 2019-09-06 - [Vert.x and OpenAPI](https://wissel.net/blog/2019/09/vertx-and-openapi.html) by [Stephan H Wissel](https://twitter.com/notessensei) at [wissel.net blog](https://wissel.net)
- 2019-09-14 - [Generating and Configuring a Mastercard API Client](https://developer.mastercard.com/platform/documentation/generating-and-configuring-a-mastercard-api-client/) at [Mastercard Developers Platform](https://developer.mastercard.com/platform/documentation/)
- 2019-09-22 - [Redefining SDKs as software diversity kits](https://devrel.net/dev-rel/redefining-sdks-as-software-diversity-kits) by [Sid Maestre (Xero)](https://twitter.com/sidneyallen) at [DevRelCon San Francisco 2019](https://sf2019.devrel.net/)
- 2019-09-23 - [swaggerからOpenApi GeneratorでSpringのコードを自動生成](https://qiita.com/littleFeet/items/492df2ad68a0799a5e5e) by [@littleFeet](https://qiita.com/littleFeet) at [Qiita](https://qiita.com/)
- 2019-09-24 - [Eine Stunde was mit Api First!](https://www.slideshare.net/JanWeinschenker/eine-stunde-was-mit-api-first) by [@janweinschenker](https://twitter.com/janweinschenker) at [Java Forum Nord](https://javaforumnord.de/)
- 2019-10-10 - [Automatic Generation of REST Clients](https://www.meetup.com/fr-FR/Criteo-Labs-Tech-Talks/events/264775768/) by Thomas Peyrard, Senior Software Engineer at Criteo in [Full-Stack Tech Talks (Meetup)](https://www.meetup.com/fr-FR/Criteo-Labs-Tech-Talks/events/264775768/)
- 2019-10-22 - [OpenAPI + Spring Boot(Kotlin)でファイルダウンロードAPIを作成する](https://qiita.com/boronngo/items/4b78b92526209daeaee9) by [Yuki Furukawa](https://twitter.com/yuki_furukawa5)
- 2019-10-24 - [Microprofile OpenAPI - Code First or Design First?](https://github.com/pe-st/apidocs/blob/master/MicroProfile-OpenAPI-all-slides.pdf) by [Peter [pɛʃə] Steiner](https://twitter.com/pesche) at [eclipsecon Europe 2019](https://www.eclipsecon.org/europe2019/sessions/microprofile-openapi-code-first-or-design-first)
- 2019-11-06 - [Generating API clients based on OpenAPI v3 specifications](https://98elements.com/blog/generating-api-clients-based-on-openapi-v3-specifications) by [Dominik Jastrzębski @ 98elements](https://98elements.com)
- 2019-11-07 - [API First development with OpenAPI - You should you practise it !?](https://www.youtube.com/watch?v=F9iF3a1Z8Y8) by [Nick Van Hoof](https://www.nickvanhoof.com/) at [Devoxx Belgium 2019](https://devoxx.be/)
- 2019-11-08 - [JHipster beyond CRUD - API-First for Enterprises by Enrico Costanzi](https://www.youtube.com/watch?v=m28JFovKQ20) by [Enrico Costanzi](https://twitter.com/enricocostanzi) at [JHipster Conf 2019 in Paris](https://jhipster-conf.github.io/)
- 2019-11-11 - [One Spec to Rule them all - OpenAPI in Action](https://www.youtube.com/watch?v=MMay_nht8ec) by [Andreas Litt](https://github.com/littldr) at [code.talks 2019](https://www.codetalks.com/)
- 2019-11-13 - [OpenAPI 3.0 Editor And Generator With A Spring Boot Example](https://simply-how.com/design-and-generate-api-code-from-openapi) at [Simply How](https://simply-how.com/)
- 2019-11-20 - [Introduction to OpenAPI](https://noti.st/lornajane/HvDH7U/introduction-to-openapi) by [Lorna Mitchell](https://twitter.com/lornajane) at [GOTO Copenhagen 2019](https://gotocph.com/2019/)
- 2019-11-20 - [How to Generate Angular code from OpenAPI specifications](https://dotnetthoughts.net/how-to-generate-angular-code-from-openapi-specifications/) by Anuraj
- 2019-11-23 - [Swagger ではない OpenAPI Specification 3.0 による API サーバー開発](https://www.slideshare.net/techblogyahoo/swagger-openapi-specification-30-api) by [Tetsuya Morimoto](https://github.com/t2y) at [JJUG CCC 2019 Fall](https://ccc2019fall.java-users.jp/)
- 2019-11-24 - [Accelerate Flutter development with OpenAPI and Dart code generation](https://medium.com/@irinasouthwell_220/accelerate-flutter-development-with-openapi-and-dart-code-generation-1f16f8329a6a) by [Irina Southwell](https://medium.com/@irinasouthwell_220)
- 2019-11-26 - [CordaCon 2019 Highlights: Braid Server and OpenAPI Generator for Corda Client API’s](https://blog.b9lab.com/cordacon-2019-highlights-braid-server-and-openapi-generator-for-corda-flows-api-s-d24179ccb27c) by [Adel Rustum](https://blog.b9lab.com/@adelrestom) at [B9lab](https://blog.b9lab.com/)
- 2019-12-03 - [A Road to Less Coding: Auto-Generate APILibrary](https://www.corda.net/blog/a-road-to-less-coding-auto-generate-apilibrary/) at [Corda Blog](https://www.corda.net/blog/)
- 2019-12-05 - [Code generation on the Java VM](https://speakerdeck.com/sullis/code-generation-on-the-java-vm-2019-12-05) by [Sean Sullivan](https://speakerdeck.com/sullis)
- 2019-12-23 - [Use Ada for Your Web Development](https://www.electronicdesign.com/technologies/embedded-revolution/article/21119177/use-ada-for-your-web-development) by [Stephane Carrez](https://github.com/stcarrez)
- 2019-12-23 - [OpenAPIのスキーマを分割・構造化していく方法](https://gift-tech.co.jp/articles/structured-openapi-schema) by [小飯塚達也](https://github.com/t2h5) at [GiFT, Inc](https://gift-tech.co.jp/)
- 2020-01-17 - [OpenAPI demo for Pulp 3.0 GA](https://www.youtube.com/watch?v=mFBP-M0ZPfw&t=178s) by [Pulp](https://www.youtube.com/channel/UCI43Ffs4VPDv7awXvvBJfRQ) at [Youtube](https://www.youtube.com/)
- 2020-01-19 - [Why document a REST API as code?](https://dev.to/rolfstreefkerk/why-document-a-rest-api-as-code-5e7p) by [Rolf Streefkerk](https://github.com/rpstreef) at [DEV Community](https://dev.to)
- 2020-01-28 - [Get Your Serverless Swagger Back with OpenAPI](https://dev.to/matttyler/get-your-serverless-swagger-back-with-openapi-48gc) by [Matt Tyler](https://dev.to/matttyler)
- 2020-02-01 - [Using OpenAPI to Maximise Your Pulp 3 Experience](https://fosdem.org/2020/schedule/event/openapi/) by [Dennis Kliban](https://github.com/dkliban/) at [FOSDEM](https://fosdem.org/)
- 2020-02-07 - [Why you should use OpenAPI for your API design](https://www.youtube.com/watch?v=zhb7vUApLW8&t=927s) by [Nick Van Hoof](https://apiconference.net/speaker/nick-van-hoof/) at [API Conference](https://apiconference.net/)
- 2020-02-17 - [Rubynetes: using OpenAPI to validate Kubernetes configs](https://www.brightbox.com/blog/2020/02/17/using-openapi-to-validate-kubernetes-configs/) by Neil Wilson at [Brightbox](https://www.brightbox.com/)
- 2020-02-20 - [Building SDKs for the future](https://devblog.xero.com/building-sdks-for-the-future-b79ff726dfd6) by [Sid Maestre (Xero)](https://twitter.com/sidneyallen)
- 2020-02-29 - [Providing Support to IoT Devices Deployed in Disconnected Rural Environment (Conference paper)](https://link.springer.com/chapter/10.1007/978-3-030-41494-8_14) by Sergio Laso, Daniel Flores-Martín, Juan Luis HerreraCarlos, CanalJuan Manuel, MurilloJavier Berrocal
- 2020-03-02 - [How To Generate Angular & Spring Code From OpenAPI Specification](https://www.mokkapps.de/blog/how-to-generate-angular-and-spring-code-from-open-api-specification/) by [Michael Hoffmann](https://www.mokkapps.de/)
- 2020-04-22 - [Introduction to OpenAPI Generator](https://nordicapis.com/introduction-to-openapi-generator/) by [Kristopher Sandoval](https://nordicapis.com/author/sandovaleffect/) in [Nordic APIs](https://nordicapis.com/)
- 2020-04-27 - [How we use Open API v3 specification to auto-generate API documentation, code-snippets and clients](https://medium.com/pdf-generator-api/how-we-use-open-api-v3-specification-to-auto-generate-api-documentation-code-snippets-and-clients-d127a3cea784) by [Tanel Tähepõld](https://medium.com/@tanel.tahepold)
- 2020-05-18 - [Spring Boot REST with OpenAPI 3](https://dev.to/alfonzjanfrithz/spring-boot-rest-with-openapi-3-59jm) by [Alfonz Jan Frithz](https://dev.to/alfonzjanfrithz)
- 2020-05-19 - [Dead Simple APIs with Open API](https://www.youtube.com/watch?v=sIaXmR6xRAw) by [Chris Tankersley](https://github.com/dragonmantank) at [Nexmo](https://developer.nexmo.com/)
- 2020-05-28 - [Building APIs with Laravel using OpenAPI](https://www.youtube.com/watch?v=xexLvQqAhiA) by [Chris Tankersley](https://github.com/dragonmantank) at [Laracon EU](https://laracon.eu/)
- 2020-06-12 - [Interoperability by construction: code generation for Arrowhead Clients](https://ieeexplore.ieee.org/document/9274746) by Michele Albano, Brian Nielsen at [2020 IEEE Conference on Industrial Cyberphysical Systems (ICPS)](https://ieeexplore.ieee.org/xpl/conhome/9274544/proceeding)
- 2020-06-29 - [Artifact Abstract: Deployment of APIs on Android Mobile Devices and Microcontrollers](https://ieeexplore.ieee.org/document/9127353) by [Sergio Laso ; Marino Linaje ; Jose Garcia-Alonso ; Juan M. Murillo ; Javier Berrocal](https://ieeexplore.ieee.org/document/9127353/authors#authors) at [2020 IEEE International Conference on Pervasive Computing and Communications (PerCom)](https://ieeexplore.ieee.org/xpl/conhome/9125449/proceeding)
- 2020-07-07 - [5 Best API Documentation Tools](https://blog.dreamfactory.com/5-best-api-documentation-tools/) by Susanna Bouse at [DreamFactory Blog](https://blog.dreamfactory.com/)
- 2020-07-12 - [Open API 3.0の定義からgolangのサーバコードのスケルトンを作成する](https://qiita.com/professor/items/4cbd04ec084d13057bc2) by [@professor (Qiita Blog)](https://qiita.com/professor)
- 2020-07-20 - [Datadog API client libraries now available for Java and Go](https://www.datadoghq.com/blog/java-go-libraries/) by Jordan Obey at [Datadog Blog](https://www.datadoghq.com/blog)
- 2020-07-23 - [Generate Client SDK for .NET Core using Open Api](https://dev.to/no0law1/generate-client-sdk-for-net-core-using-open-api-2dgh) by [Nuno Reis](https://dev.to/no0law1)
- 2020-08-03 - [Criando Bibliotecas para APIs RESTful com OpenAPI, Swagger Editor e OpenAPI Generator](https://medium.com/@everisBrasil/criando-bibliotecas-para-apis-restful-com-openapi-swagger-editor-e-openapi-generator-75349a6420fd) by [everis Brasil (an NTT DATA Company)](https://medium.com/@everisBrasil)
- 2020-09-10 - [Introduction to OpenAPI with Instana](https://www.instana.com/blog/introduction-to-openapi-with-instana/) by [Cedric Ziel](https://www.instana.com/blog/author/cedricziel/) at [Instana Blog](https://www.instana.com/blog/)
- 2020-09-17 - [Generate PowerShellSDK using openapi-generator](https://medium.com/@ghufz.learn/generate-powershellsdk-using-openapi-generator-33b700891e33) by [Ghufran Zahidi](https://medium.com/@ghufz.learn)
- 2020-09-24 - [How to automate API code generation (OpenAPI/Swagger) and boost productivity - Tutorial with React Native featuring TypeScript](https://medium.com/@sceleski/how-to-automate-api-code-generation-openapi-swagger-and-boost-productivity-1176a0056d8a) by [Sanjin Celeski](https://medium.com/@sceleski)
- 2020-10-24 - [Working with Microsoft Identity - React Native Client](https://www.josephguadagno.net/2020/10/24/working-with-microsoft-identity-react-native-client) by [Joseph Guadagno](https://www.josephguadagno.net/)
- 2020-10-31 - [[B2] OpenAPI Specification으로 타입-세이프하게 API 개발하기: 희망편 VS 절망편](https://www.youtube.com/watch?v=J4JHLESAiFk) by 최태건 at [FEConf 2020](https://2020.feconf.kr/)
- 2020-11-05 - [Automated REST-Api Code Generation: Wie IT-Systeme miteinander sprechen](https://www.massiveart.com/blog/automated-rest-api-code-generation-wie-it-systeme-miteinander-sprechen) by Stefan Rottensteiner at [MASSIVE ART Blog](https://www.massiveart.com/blog)
- 2020-12-04 - [Scaling the Test Coverage of OpenAPI Generator for 30+ Programming Languages](https://www.youtube.com/watch?v=7Lke9dHRqT0) by [William Cheng](https://github.com/wing328) at [Open Source Summit Japan + Automotive Linux Summit 2020](https://events.linuxfoundation.org/archive/2020/open-source-summit-japan/) ([Slides](https://speakerdeck.com/wing328/scaling-the-test-coverage-of-openapi-generator-for-30-plus-programming-languages))
- 2021-01-08 - [Hello, New API – Part 1](https://www.nginx.com/blog/hello-new-api-part-1/) by [Jeremy Schulman](https://www.nginx.com/people/jeremy-schulman/) at [Major League Baseball](https://www.mlb.com)
- 2021-02-05 - [REST-API-Roundtrip with SpringDoc and OpenAPI Generator](https://blog.viadee.de/en/rest-api-roundtrip) by [Benjamin Klatt](https://twitter.com/benklatt) at [viadee](https://www.viadee.de/en/)
- 2021-02-17 - [REST-API-Roundtrip with SpringDoc and OpenAPI Generator](https://medium.com/nerd-for-tech/rest-api-roundtrip-with-springdoc-and-openapi-generator-30bd27ccf698) by [cloud @viadee](https://cloud-viadee.medium.com/)
- 2021-03-08 - [OpenAPI Generator 工具的躺坑尝试](https://blog.csdn.net/u013019701/article/details/114531975) by [独家雨天](https://blog.csdn.net/u013019701) at [CSDN官方博客](https://blog.csdn.net/)
- 2021-03-28 - [Trying out NestJS part 4: Generate Typescript clients from OpenAPI documents](https://dev.to/arnaudcortisse/trying-out-nestjs-part-4-generate-typescript-clients-from-openapi-documents-28mk) by [Arnaud Cortisse](https://dev.to/arnaudcortisse)
- 2021-03-31 - [Open API Server Implementation Using OpenAPI Generator](https://www.baeldung.com/java-openapi-generator-server) at [Baeldung](https://www.baeldung.com/)
- 2021-03-31 - [使用OpenAPI Generator實現Open API Server](https://www.1ju.org/article/java-openapi-generator-server) at [億聚網](https://www.1ju.org/)
- 2021-04-19 - [Introducing Twilio’s OpenAPI Specification Beta](https://www.twilio.com/blog/introducing-twilio-open-api-specification-beta) by [GARETH PAUL JONES](https://www.twilio.com/blog/author/gpj) at [Twilio Blog](https://www.twilio.com/blog)
- 2021-04-22 - [Leveraging OpenApi strengths in a Micro-Service environment](https://medium.com/unibuddy-technology-blog/leveraging-openapi-strengths-in-a-micro-service-environment-3d7f9e7c26ff) by Nicolas Jellab at [Unibuddy Technology Blog](https://medium.com/unibuddy-technology-blog)
- 2021-04-27 - [From zero to publishing PowerShell API clients in PowerShell Gallery within minutes](https://speakerdeck.com/wing328/from-zero-to-publishing-powershell-api-clients-in-powershell-gallery-within-minutes) by [William Cheng](https://github.com/wing328) at [PowerShell + DevOps Global Summit 2021](https://events.devopscollective.org/event/powershell-devops-global-summit-2021/)
- 2021-06-22 - [Rest API Documentation and Client Generation With OpenAPI](https://dzone.com/articles/rest-api-documentation-and-client-generation-with) by [Prasanth Gullapalli](https://dzone.com/users/1011797/prasanthnath.g@gmail.com.html)
- 2021-07-19 - [OpenAPI code generation with kotlin](https://sylhare.github.io/2021/07/19/Openapi-swagger-codegen-with-kotlin.html) by [sylhare](https://github.com/sylhare)
- 2021-07-29 - [How To Rewrite a Huge Codebase](https://dzone.com/articles/how-to-rewrite-a-huge-code-base) by [Curtis Poe](https://dzone.com/users/4565446/publiusovidius.html)
- 2021-08-21 - [Generating Client APIs using Swagger Part 1](https://medium.com/@flowsquad/generating-client-apis-using-swagger-part-1-2d46f13f5e92) by [FlowSquad.io](https://medium.com/@flowsquad)
- 2021-09-11 - [Invoking AWS ParallelCluster API](https://docs.aws.amazon.com/parallelcluster/latest/ug/api-reference-v3.html) at [AWS ParallelCluster API official documentation](https://docs.aws.amazon.com/parallelcluster/latest/ug/api-reference-v3.html)
- 2021-09-20 - [OpenAPI Generator - The Babel Fish of the API World](https://www.youtube.com/watch?v=s2zMtwd5klg) by [Cliffano Subagio (Principal Engineer at Shine Solutions)](https://github.com/cliffano) at [Apidays LIVE Australia 2021](https://www.apidays.global/australia2021/)
- 2021-10-02 - [How to Write Fewer Lines of Code with the OpenAPI Generator](https://hackernoon.com/how-to-write-fewer-lines-of-code-with-the-openapi-generator) by [Mikhail Alfa](https://hackernoon.com/u/alphamikle)
- 2021-10-12 - [OpenAPI Generator : 4000 étoiles sur GitHub et des spaghettis](https://www.youtube.com/watch?v=9hEsNBSqTFk) by [Jérémie Bresson](https://github.com/jmini) at [Devoxx FR 2021](https://cfp.devoxx.fr/2021/speaker/jeremie_bresson)
- 2021-10-17 - [Generate a TypeScript HTTP Client From An OpenAPI Spec In DotNET 5](https://richardwillis.info/blog/generate-a-type-script-http-client-from-an-open-api-spec-in-dot-net-5) by [Richard Willis](https://github.com/badsyntax)
- 2021-11-06 - [スタートアップの開発で意識したこと](https://zenn.dev/woo_noo/articles/5cb09f8e2899ae782ad1) by [woo-noo](https://zenn.dev/woo_noo)
- 2021-11-09 - [Effective Software Development using OpenAPI Generator](https://apexlabs.ai/post/effective-software-development-using-openapi-generator) by Ajil Oomme
- 2021-12-07 - [An Introduction to OpenAPI](https://betterprogramming.pub/4-use-cases-of-openapi-which-are-good-to-know-1a041f4ad71e) by [Na'aman Hirschfeld](https://naamanhirschfeld.medium.com/)
- 2022-01-02 - [Towards a secure API client generator for IoT devices](https://arxiv.org/abs/2201.00270) by Anders Aaen Springborg, Martin Kaldahl Andersen, Kaare Holland Hattel, Michele Albano
- 2022-02-02 - [Use OpenApi generator to share your models between Flutter and your backend](https://www.youtube.com/watch?v=kPW7ccu9Yvk) by [Guillaume Bernos](https://feb2022.fluttervikings.com/speakers/guillaume_bernos) at [Flutter Vikings Conference 2022 (Hybrid)](https://feb2022.fluttervikings.com/)
- 2022-03-15 - [OpenAPI Specでハイフン区切りのEnum値をOpenAPI Generatorで出力すると、ハイフン区切りのまま出力される](https://qiita.com/yuji38kwmt/items/824d74d4889055ab37d8) by [yuji38kwmt](https://qiita.com/yuji38kwmt)
- 2022-04-06 - [Effective Software Development using OpenAPI Generator](https://apexlabs.ai/post/openapi-generator) by Ajil Oommen (Senior Flutter Developer)
- 2022-05-13 - [A Path From an API To Client Libraries](https://www.youtube.com/watch?v=XC8oVn_efTw) by [Filip Srnec](https://www.devoxx.co.uk/talk/?id=11211) at Infobip
- 2022-06-01 - [API First, using OpenAPI and Spring Boot](https://medium.com/xgeeks/api-first-using-openapi-and-spring-boot-2602c04bb0d3) by [Micael Estrázulas Vianna](https://estrazulas.medium.com/)
- 2022-06-10 - [Autogenerating Clients with FastAPI and Github Actions](https://www.propelauth.com/post/autogenerating-clients-with-fastapi-and-github-actions) by [Andrew Israel](https://www.propelauth.com/author/andrew)
- 2022-07-01 - [Generate API contract using OpenAPI Generator Maven plugin](https://huongdanjava.com/generate-api-contract-using-openapi-generator-maven-plugin.html) by [Khanh Nguyen](https://huongdanjava.com/)
- 2022-08-01 - [Tutorial: Etsy Open API v3 (ruby)](https://blog.tjoyal.dev/etsy-open-api-v3/) by [Thierry Joyal](https://github.com/tjoyal)
- 2022-09-03 - [OpenAPI Generator For Go Web Development](https://blog.kevinhu.me/2022/09/03/03-openapi-generator/) by [Kevin Hu](https://twitter.com/Oldgunix)
- 2022-11-28 - [The REST API implementation flow](https://tmsvr.com/openapi-code-generation-for-rest-apis/) by [Imre Tömösvári](https://tmsvr.com/author/imre/)
- 2022-12-13 - [API-First with Spring WebFlux and OpenAPI Generator](https://boottechnologies-ci.medium.com/api-first-with-spring-webflux-and-openapi-generator-38b7804c4ed4) by [Eric Anicet](https://boottechnologies-ci.medium.com/)
- 2023-01-06 - [Major Improvements with Helidon and OpenAPI](https://medium.com/helidon/major-improvements-with-helidon-and-openapi-f76a0951508e) by [Tim Quinn](https://medium.com/@tquinno600)
- 2023-02-02 - [Replacing Postman with the Jetbrains HTTP Client](https://lengrand.fr/replacing-postman-in-seconds-with-the-jetbrains-http-client/) by [julien Lengrand-Lambert](https://github.com/jlengrand)
- 2023-04-01 - [OpenAPI Client Code Generation](https://testingboss.com/blog/openapi-client-generation/) by Kwo Ding
- 2023-04-27 - [Create an Angular Client using OpenAPI Specifications](Create an Angular Client using OpenAPI Specifications) by [Patric](https://pguso.medium.com/)
- 2023-05-16 - [Adyen for Java developers](https://www.adyen.com/blog/adyen-java-library) by [Beppe Catanese, Developer Advocate, Adyen](https://github.com/gcatanese)
- 2023-06-28 - [Generate API contract using OpenAPI Generator Maven plugin](https://huongdanjava.com/generate-api-contract-using-openapi-generator-maven-plugin.html) by [Khanh Nguyen](https://huongdanjava.com/)
- 2023-06-30 - [Generate Client SDKs with OpenApi Generator in Springboot](https://medium.com/@ramavathvinayak/generate-client-sdks-with-openapi-generator-in-springboot-f9f012e73c0b) by [Vinayak Ramavath](https://medium.com/@ramavathvinayak)
- 2024-01-24 - [Comment générer des stubs wiremock avec openapi generator](https://www.youtube.com/watch?v=0jhONfBrcKw) by [Alexis Couvreur](https://github.com/acouvreur)
- 2024-03-04 - [Generating TypeScript Types with OpenAPI for REST API Consumption](https://www.pullrequest.com/blog/generating-typescript-types-with-openapi-for-rest-api-consumption/) by [PullRequest](https://www.pullrequest.com/)
- 2024-03-07 - [Fully typed Web Apps with OpenAPI (Part 1)](https://medium.com/@gfox1984/fully-typed-web-apps-with-openapi-part-1-595d55766670) by [Guillaume Renard](https://medium.com/@gfox1984)
- 2024-04-04 - [Working with OpenAPI using Rust](https://www.shuttle.dev/blog/2024/04/04/using-openapi-rust) by [Joshua Mo](https://twitter.com/joshmo_dev)
- 2024-04-08 - [Implement API first strategy with OpenAPI generator plugin](https://medium.com/javarevisited/implement-api-first-strategy-with-openapi-generator-plugin-e4bbe7f0d778) by [Rui Zhou](https://medium.com/@wirelesser)
- 2024-05-06 - [OpenAPI Generator Custom Templates](https://www.javacodegeeks.com/openapi-generator-custom-templates.html) by [Mary Zheng](https://www.javacodegeeks.com/author/mary-zheng)
- 2025-02-09 - [Custom validation with OpenApiGenerator and Spring Boot 3](https://medium.com/@jugurtha.aitoufella/custom-validation-with-openapigenerator-and-spring-boot-3-34a656e815c8) by [Jugurtha Aitoufella](https://medium.com/@jugurtha.aitoufella)
- 2025-02-20 - [Optimizing API Integration in a Large React Application Using OpenAPI Generator](https://www.youtube.com/watch?v=-B33pQnGQUI) by Stefano Marzo
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: 600k weekly downloads via NPM CLI wrapper, 30M 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).
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.
- rank within top 50 in https://github.com/openapitools/openapi-generator/graphs/contributors
- to contribute, here are some good [starting points](https://github.com/openapitools/openapi-generator/issues?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22)
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)
OpenAPI Generator is a fork of [Swagger Codegen](https://github.com/swagger-api/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](docs/qna.md) for more information.
