Write a script

The services of a web programmer are required. It requires writing a script. Interested in the “script” that will support the account of the social network Vkontakte online under the condition of the activity of another person. Simulating simultaneous activity. I thought to put on the cron server a task that will execute this “script” with an interval of 2-3 seconds. As far as I understand, VK does not directly give the user status, but it can be obtained from the xml file of the foap page, which requires an account token. I wanted to know the cost of this project. Integration with the CAPTCHA service is not required. Thanks for your reply!