When a new text is generated MyAX will send a HTTP POST request to the webhook URL. It has a signature header to verify the integrity/authenticity and some data about the object and the text in the post data body.
HTTP_X_MYAX_SIGNATURE: "sha1=47d5b4154bc4161aaf4279d127f1a52d64895da1"
The checksum is calculated as hmac sha1 hexdigest. The key is your API token. The message is the post data.
{
"id": 9001
"name": "<The name of the object>",
"text": "<The new text (raw)>",
"text_as_html": "<The new text (as html from markdown)>",
"uid": "<The uid you put in the object>",
"content_project_name": "<Name of the content project>",
"content_project_id": 1337,
"text_modified": "2015-10-21T23:29:00.000000+00:00",
}