I have created a simple Mendix app with a REST API in my local environment. When attempting to send GET or POST requests using Postman, Thunder Client, or from another Mendix app, I can successfully access the data. However, when attempting to use the built-in fetch function in JS or Axios, I am encountering an 'ECONNREFUSED' error. I only have one app running on the port to which I am attempting to send the request, and as mentioned previously, I am able to successfully access the data using other methods such as Postman, another Mendix app, or a browser. Despite my efforts, I have not been able to find a solution to this issue. Thank you in advance for any responses, and if I am able to find a solution, I will be sure to update this post.
1 answers

Are you running a http proxy on your computer?

It could be that this is being picked up by Mendix, Postman, Thunder Client, etc, but not by your local JavaScript environment. This would explain why it works for some platforms, but not others.

I hope this helps.