I may be wrong but I think the max payload per response is 255 bytes and if the response is more than that it will send the reply in multiple messages.
I have a weather webhook that returns in multiple messages because the reply is more than 255 bytes in total.
@sb4, the response will be in 512 byte chunks with as many chunk should as it takes, including the last partial chunk. Your subscription callback needs to handle the multiple chunks if you expect a large response.
Is an example available how to split the payload in multiple messages, RWB?
It is possible to check how long the string is and give a message “to long to handle” as example with IF/THEN?