Sending files using webhooks is compatible with using Content-Type: multipart/form-data header only. You can send up to 10 files in same request. Notice that you can't send nested parameters using form like embeds. Instead of that put json of message as value of payload_json parameter.

Don't forget to add unique names to name fields when adding images. Otherwise only one of file with same names will be sent.


input data example

result example