##  [Ansys Speos - Previous releases](/docs/speos/previous) 

###### Speos RPC

The Speos RPC is based on a gRPC server and provides APIs to interact with Speos solver. This allows you to use Speos software capabilities without starting any CAD and therefore offers the possibility to manage Speos software capabilities with more liberty.

[2026 R1 SP02](/docs/speos-rpc-2026-r1-sp02/index.md)

[2026 R1 SP01](/docs/speos-rpc-2026-r1-sp01/index.md)

[2026 R1](/docs/speos-rpc-2026-r1/index.md)

[2025 R2 SP03](/docs/speos-rpc-2025-r2-sp03/index.md)

[2025 R2 SP01](/docs/speos-rpc-2025-r2-sp01/index.md)

[2025 R2](/docs/speos-rpc-2025-r2/index.md)

[2025 R1 SP04](/docs/speos-rpc-2025-r1-sp04/index.md)

[2025 R1 SP01](/docs/speos-rpc-2025-r1-sp01/index.md)





 

 



###### Speos client APIs documentation

Provides API references and methods for the **SpeosSim**, **SpeosDes**, and **SpeosAsm** interfaces.

[2026 R1 SP01](/docs/speos-client-apis-2026-r1-sp01/client-speos-api-home.md)

[2026 R1](/docs/speos-client-apis-2026-r1/client-speos-api-home.md)

[2025 R2](/docs/speos-client-apis-2025-r2/client-speos-api-home.md)

[2025 R1](/docs/speos-client-apis-2025-r1/client-speos-api-home.md)

[2024 R2](/docs/speos-client-apis-2024-r2/client-speos-api-home.md)

[2024 R1](/docs/speos-client-apis-2024-r1/client-speos-api-home.md)

[2023 R2](https://github.com/ansys-internal/DevRelDocs/raw/main/2023R2/Ansys_Speos_API_2023R2.zip)





 

 



###### Speos NX library

Provides API references and methods for the Speos for NX features.

[2025 R2](/docs/speos-nx-library-2025-r2/index.xhtml)

[2025 R1](/docs/speos-nx-library-2025-r1/index.xhtml)

[2024 R2](/docs/Speos-NX-2024-R2/index.xhtml)





 

 



 

 

 



###### Speos Labs automation APIs 

Provides both general information and API references for automation.

[2025 R2](</docs/speos-labs-automation-2025-r2/lab_api_home.md >)

[2025 R1](</docs/speos-labs-automation-2025-r1/lab_api_home.md >)

[2024 R2](</docs/speos-labs-automation-2024-r2/lab_api_home.md >)

[2024 R1](/docs/speos-labs-automation-apis-2024-r1/lab_api_home.md)

[2023 R2](https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/Optis_UG_LAB/Optis/UG_Lab/automation_17281.html)





 

 



###### Speos Core methods

Provides methods to run external Speos simulations.

[2025 R2](/docs/speos-core-methods-2025-r2/client-speos-core-api-home.md)

[2025 R1](/docs/speos-core-methods-2025-r1/client-speos-core-api-home.md)

[2024 R2](/docs/speos-core-methods-2024-r2/client-speos-core-api-home.md)