Can't upload image file using Wordpress REST API (Node JS)

You'll want to change the formData of your request to specify media as follows:

var formData = {  title: 'Post title',  content: 'Post body',  'media[0]': fs.createReadStream('local/path/to/image.jpg')}

Any additional media should increment the index. You can similarly specify attributes by index:

'media_attrs[0][caption]': 'My Great Photo'

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