What is the correct way to monitor my own captcha requests?

[EtaLasquera]

Hi all!

I register into a database every request who I send to capmonsterclud:

C#

return ZennoLab.OwnCode.CommonCode.DataSource();

SQL

insert into 
    capmonster 
values (
    {-Variable.program-},
    getdate()
);

Based on this structure, yesterday I got this results, requests by hour:

And here is my capmonster request data:

Based on graph, the cost of capmonster is based on every time who I send one request into a capmonster or it is based on how many requests capmonster do to solve one captcha?

Usually I send 600 requests day, in exceptions 2000 requests into a day but in past 24 hours capmonster say I use much more than 2000 requests into a day.

Can I check IP of this requests?