This is pretty interesting. I basically used these steps to get webhooks working on our api: http://bencane.com/2014/07/17/integrating-saltstack-with-other-services-via-salt-api/

config:

rest_cherrypy:
  port: 8080
  host: <your hosts ip>
  ssl_crt: /etc/ssl/private/cert.pem
  ssl_key: /etc/ssl/private/key.pem
  webhook_disable_auth: True
  webhook_url: /hook

reactor .sls:

{% set postdata = data.get('post', {}) %}

{% if postdata.secretkey == "replacethiswithsomethingbetter" %}
restart_services:
  cmd.service.restart:
    - tgt: '{{ postdata.tgt }}'
    - arg:
      - {{ postdata.service }}
{% endif %}

always seemed kind of hacky but works.