With multiple text inputs turned on, it is displayed on the action execution screen that the actual transmitted value becomes the default line break code \n , but when executed, it becomes Malformed JSON in request body. It seems that a value that looks like a space is transmitted in experimantal > args of the data before processing due to customizing the results, and I don't think this has been replaced by a line break code. Source: HTTP API parameters: - name: detail - Advanced settings: text (required), ON for entering multiple lines, OFF for specifying line breaks Method: POST Request type: JSON Request body: { “name”: “{{name}}”, “companyId”: “{{companyId}}”, “detail”: “{{detail}}”, } ※It's a memory that didn't work without putting double quotes before and after the variables in the request body, but as far as I can see from the documentation, it seems unnecessary. However, the behavior did not change even without double quotes.