: A valid WinCC/Connectivity Pack license is mandatory. Without it, the API will return a 402 Payment Required error.
If REST isn’t suitable, consider:
For the REST service to run automatically when the WinCC Runtime starts, it needs to be added to the startup list. wincc rest api
The WinCC REST API transforms Siemens WinCC from a localized control room application into an open, collaborative enterprise data hub. By translating complex PLC data into structured JSON over HTTP, it empowers IT developers, data scientists, and automation engineers to build interconnected systems with minimal friction. Whether you are running WinCC V8 or deploying WinCC Unified, mastering this API is a critical step toward unlocking true industrial digital transformation. : A valid WinCC/Connectivity Pack license is mandatory
if (response.IsSuccessful)
throw new Exception($"Error reading tag: response.ErrorMessage"); The WinCC REST API transforms Siemens WinCC from
The REST interface allows external clients—such as mobile apps, MES (Manufacturing Execution Systems), or AI agents—to perform the following actions: