Is it possible to post files to Slack using the incoming Webhook?

Question

I am trying out the Slack\'s API using the incoming webhook feature, posting messages works flawlessly, but it doesn\'t seem to allow any file attachments.

Looking t

Answer 1

No, its is not possible to upload files through an incoming Webhook. But you can attach image URLs to your attachments with the image_url tag.

To upload files you need to use the Slack Web API and the files.upload method. Yes, it requires a different authentication, but its not that complicated if you just use a test token for all API calls.