Can I upload user files to my service through an action?

[former.token]

Yeah, just noticed it here

Unable to upload a file to my external API and always getting an validation error that indicates params are not getting passed correctly

The issue you’re encountering with uploading a file to your external API seems to be related to how you’ve defined the file upload process in your OpenAPI schema and how you’re handling the request in your PowerShell script. Based on your OpenAPI schema, the endpoint /fileUpload expects a multipart/form-data request with two required fields: fileSource (the binary data of the file) and name. The fileSource field should contain the actual binary data of the .zip file, and the name field is a st…

So the only way is to use the conventional app, and then direct user to GPT that would support what I outlined above.