##  [Ansys optiSLang - Previous releases](/docs/optislang/previous) 

###### **Remote Control interface optiSLang Web Service REST API**

Remotely build, modify, and control​ projects or the web service.

[2024 R2](/api-catalog/optislang-web-service-rest-api/api-description-2024r2)

[2024 R1](/api-catalog/optislang-web-service-rest-api/api-description-241)

[2023 R2](/api-catalog/optislang-web-service-rest-api/api-description)





 

 



###### **Interfaces and Customization Guide**

Extend optiSLang functionality via plugins (customer login required).

[2025 R2](/docs/optislang-interfaces-and-customizations-2025-r2/index.md)

[2025 R1](https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v251/en/opti_api/opti_api.html)

[2024 R2](https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v242/en/opti_api/opti_api.html)

[2024 R1](https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v241/en/opti_api/opti_api.html)

[2023 R2](https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/opti_api/opti_api.html)





 

 



 

 

 



###### **Metamodels**

Postprocess or use 0D and nD metamodels.

Check out the [MOP](/product/optiSLang-MOPSolver-API-2023-R2/index.xhtml) and the [Field-MOP](/product/SoS-C-API-of-FMOPSolver-Library/index.xhtml) documentation.





 

 



###### **Client APIs**

- View [optiSLang Python API 2026 R1](/docs/optislang-python-api-2026-r1/index.md) for workflows. Download previous version: [optiSLang Python API 2025 R1](https://github.com/ansys/DevRelPublic/blob/main/Downloads/optiSLang/optiSLang-Python_doc_2025_R2.zip) or [optiSLang Python API 2024 R2](https://github.com/ansys/DevRelDocs/raw/main/2024R1/python_api.zip)
- See [Postprocessing Python scripting 2025 R1](/docs/optislang-3d-postprocessing-script-api-2025-r1/index.xhtml) or [Postprocessing Python scripting 2024 R2](https://ansyshelp.ansys.com/public/account/secured?returnurl=/Views/Secured/corp/v242/en/opti_ug/opti_ug_python_scripting.html?q=python") for postprocessing.
- See the [oSP3D Script API 2024 R1](h/product/oSP3D/index.xhtml) and its renamed, more recent version, [optiSLang 3D Postprocessing Script API 2024 R2 SP02](/product/optiSLang-3D-Postprocessing-Script-API-2024-R2-SP02/index.xhtml) for 3D postprocessing.