Thank you very much tpartner.

I managed to get it to work. However, I decided to do some stuff different then I described it before, I will try to explain my current approach so that if people have a similar problem can profit.

Im using Microsoft Botframework and integrate it into a Limsurveyquestion using the JavaScript Ui component from BotFramework-WebChat (Github: github.com/microsoft/BotFramework-WebChat ).

From the Botframework I can send events, that I can receive using JavaScript (example code can be found here: github.com/microsoft/BotFramework-WebCha...oming-activity-event ).

The data of the events I can then use to prefill a question that is hidden using the CSS class "hidden". The code that i use for this look like this:

window.addEventListener('webchatincomingactivity', ({ data }) => {
console.log(`Received an activity of type "${data.type}":`);
console.log(data);
if(data.type === "event"){
$("#answer8944X7X28").val(data.value).trigger('keyup');

}
});

If you're API is already in javascript : cleraly : best is adding it in an hidden (by css) question