For given list of the website find out all the parameters need to be passed to successfully create event. Create automated bots to scan through different regions and find out such parameter requirement for all given regions for a website
Create Script/API to post event on the websites.
Script will take required parameter data from our database and if anything is missing, it will ask user to fill that information from web form
Create automated script to retrieve the responses of users on third party websites either through API calls or running bots on time interval
If the above is not possible parse the email notification received on account and retrieve user details
User details should consist of email, Name, mobile number, Status ,event id etc.
Please Go through the following document for better understanding:
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If any clarification required i will be happy to do.