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OTAPI.USP 1.0.13

There is a newer prerelease version of this package available.
See the version list below for details. 
dotnet add package OTAPI.USP --version 1.0.13
 
 
NuGet\Install-Package OTAPI.USP -Version 1.0.13
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="OTAPI.USP" Version="1.0.13" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="OTAPI.USP" Version="1.0.13" />
 


 Directory.Packages.props
 

 

 
<PackageReference Include="OTAPI.USP" />
 


 Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add OTAPI.USP --version 1.0.13
The NuGet Team does not provide support for this client. Please contact its maintainers for support. 
#r "nuget: OTAPI.USP, 1.0.13"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package OTAPI.USP@1.0.13
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=OTAPI.USP&version=1.0.13
 


 Install as a Cake Addin
 

 

 
#tool nuget:?package=OTAPI.USP&version=1.0.13
 


 Install as a Cake Tool
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

OTAPI Unified Server Process

OTAPI.USP is a secondary IL patch built on top of OTAPI, enabling multiple isolated Terraria server instances to run within a single process.

Unlike standard OTAPI builds, this package introduces a breaking change by redirecting access to static fields within the Terraria server to their instance-scoped equivalents. This change allows each server instance to operate in a fully isolated execution context—enabling true multi-server concurrency within a single host process.

Key Features

  • 🧩 Built on top of OTAPI (IL-patched TerrariaServer.exe)
  • ⚠️ Breaking change: static server state is redirected to instance-level context
  • 🧵 Supports multiple Terraria server instances running in parallel threads
  • 💡 Enables advanced hosting models (e.g., high-density server clusters, custom orchestration, dynamic scaling)

Compatibility

  • Terraria: 1.4.4.9
  • OTAPI: 3.2.6+9348ecf600322b8492d16a48bf9b1fd6eb7619a3

Important Notes

  • This package is not drop-in compatible with standard OTAPI mods.
  • Due to static field redirection, code that relies on traditional static access (e.g., Main.time, Netplay) must be adapted to use the appropriate instance context.
  • For mod development or integration, consult the API documentation or source examples on GitHub.

Licensing

This package follows the licensing terms of OTAPI and the original Terraria server executable. See COPYING.txt for details.

Product Versions Compatible and additional computed target framework versions.
.NET net9.0 net9.0 is compatible.  net9.0-android net9.0-android was computed.  net9.0-browser net9.0-browser was computed.  net9.0-ios net9.0-ios was computed.  net9.0-maccatalyst net9.0-maccatalyst was computed.  net9.0-macos net9.0-macos was computed.  net9.0-tvos net9.0-tvos was computed.  net9.0-windows net9.0-windows was computed.  net10.0 net10.0 was computed.  net10.0-android net10.0-android was computed.  net10.0-browser net10.0-browser was computed.  net10.0-ios net10.0-ios was computed.  net10.0-maccatalyst net10.0-maccatalyst was computed.  net10.0-macos net10.0-macos was computed.  net10.0-tvos net10.0-tvos was computed.  net10.0-windows net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on OTAPI.USP:

Package Downloads
UnifierTSL

An experiment-friendly Terraria server launcher based on OTAPI USP, hosting multiple worlds in a single process with per-instance consoles, a release assistant, and plugin scaffolding

GitHub repositories

This package is not used by any popular GitHub repositories.

Preliminary Terraria 1.4.4.9