Hi Frankie Frankie ,  I have uploaded a complete example here that you can use to understand how to call the DeepL provider from project automation in a StandAlone application.

Example project:
https://github.com/RWS/Sdl-Community/tree/master/Code%20samples/ProjectAutomation/ProjectAutomation

Steps:

1. Download an install the signed version of DeepL provider first.  You can download it from here: https://appstore.rws.com/Plugin/24

2. Install Trados Studio 2024 (latest CU)

3. Open the sample project (above) in VS.
Important: open the VS as a admin.  This is needed as you'll be compiling & running the exe in the installation folder of Trados Studio

4. In VS, ensure you have unchecked the option PInvokeStackImbalance
- Open the Exception Settings: Ctrl+Alt+E
- Uncheck: Managed Debugging Assistants->PInvokeStackImbalance

5. From the program.cs, update the information  in the TODO's

static void Main(string[] args)
{
    // TODO: Set location where to find the source files
    var sourceFilesDirectory = @"c:\temp\source files folder";

    // TODO: Set location for the project output folder... projects will be created here in sub-folders
    var projectsDirectory = @"c:\temp\projects";
    if (!Directory.Exists(projectsDirectory))
	{
		Directory.CreateDirectory(projectsDirectory);
	}

	// TODO: Set the source and target language combination
	var sourceLanguage = "en-US"; // Change this to match the source language
	var targetLanguage = "it-IT"; // Change this to match the target language

	// TODO: Set the memory resource
	var memory = new MemoryResource
	{
        //Example to connect to deepL provider (https://appstore.rws.com/Plugin/24)
        Uri = new Uri("deepltranslationprovider:///"),
        UserNameOrClientId = "[your DeepL account e-mail]",
        Credential = "[your DeepL account API key]"
    };

	CreateProject(sourceFilesDirectory, projectsDirectory, sourceLanguage, targetLanguage, memory);

	Console.WriteLine("Done!");
	Console.ReadLine();
}

let me know how it goes