Bot that auto-registers on my own Wordpress site?

I am looking for a bot or something to auto-register to my Wordpress site and make a post. The account will make a single post, and would not be necessary for anything else.

I'm thinking I would have two Google Spreadsheets (obviously I'm open to anything else)
Spreadsheet one (registration)
[First name][Last name][Username][E-mail Address][Password]

Spreadsheet two (content post)
[E-mail address][Password][Post title][Post content]

Step 1 would be to register the bot using the username and password. Once registration is complete, delete that line in the spreadsheet.
Step 2 would be to use the username and password, along with the post details and make a post. Once registration is complete, delete that line in the spreadsheet.

If anyone knows how to accomplish this, it would be amazing!

Have you tried Article marketing Robot? It has a huge list of various scripts and platform. I remember that it had an option to import the accounts of wordpress sites, but I don't remember for sure if it has the option to create an account. You might want to ask the developer of the software about that.