The following section gives a general introduction to working with yunIO. The information described in the following section is a prerequisite for all subsequent sections.

Starting yunIO #

To access the yunIO Designer, enter the designer-URL in a web browser.
The URL pattern to access the yunIO Designer is http://[host]:[port]. Example: http://localhost:8077.

  • If the yunIO service runs on a local server, replace [host] with localhost.
  • If the yunIO service does not run on the same machine as the browser, replace [host] with the name or IP address of the host on which the service runs.
  • After the installation the yunIO Designer is accessible under the default port 8077.
    You can configure the port under Settings in the yunIO Designer.

Note: Make sure that the yunIO service is running and that the default port 8077 is not blocked by your firewall.

Adding an SAP Connection #

In the Connection menu you can add new SAP connections and edit or delete existing connections.

  1. To add a new SAP connection, click [Add Connection] (1).
    To edit an existing connection, click the edit icon (Edit) of the connection you want to edit (2). web-ui
  2. Enter the connection information of your SAP system under System (3).
  3. Enter your SAP credentials under Authentication (4).
  4. To validate the connection parameters, click [Test Connection] (5). A window with a status message opens.
  5. Click [Save] to save the connection settings.

For more detailed information on establishing an SAP connection, see SAP Connection.

Creating a Service #

In the Services menu you can create new web services and edit, run or delete existing web services.

  1. To create a new service, click [Add Service] (1).
  2. Enter a name for the service and choose an existing SAP connection under General (2).
  3. Optional: Add a short description for the service.
  4. Choose an Extraction Type (3). yunIO offers the following options: SAP Tables or Views,Function Modules or Transaction.
  5. Click [Save and edit]. To set up the service, see SAP Table or View, Function Module / BAPI or Transactions.

To edit the name, description and source of an existing service, click the Edit icon.
To edit the extraction type settings of the service, click the Edit icon.

How to run a Service #

Web services created with yunIO can be integrated into all cloud applications that support REST API/Swagger (OpenAPI), e.g. Power Automate, Nintex, etc.

  • To test a service after creation, trigger the URL of the service endpoint under Service (1). The service is then executed in your web browser.
  • To integrate a yunIO web service into a tool that supports Swagger/OpenAPI, copy the code or download the service definition (2).


Note: Only services that do not require parameters supplied by a caller will display any SAP results in the browser. For parameterized services, use a tool that supports Swagger/OpenAPI definitions (e.g.Swagger Inspector, Postman) .


yunIO services support the http methods POST and GET.

Data Length No restrictions. Maximum URL length is 2048 characters.
Parameters Parameters are part of the http request body. Supports query parameters in the URL.
Data Safety Parameters are not stored in the browser history or in web server logs. Parameters are visible in the service URL. Data is cached.
Data Types No restrictions. Only supports ASCII characters.

Recommendation: We recommend using the POST method with Transport Layer Security (HTTPS) to ensure data protection. Do not use the GET method to send sensible data, e.g. credentials.

When using the OpenAPI/Swagger definition, POST and GET are both available. Select the method you want to use:

Example for using POST with an input parameter NAME1:

Example for using GET with an input parameter NAME1: