Hi Nor.Zaili,
What version of API Developer Portal are you running? If it is v3.0 or v3.1, you can find a list of reports and how to generate them on the sub-pages of this particular wiki page: https://wiki.ca.com/display/APIDP31/Generate+Reports
The above links walks you through the following reports:
If it is a custom report you are looking for, the data can likely be taken out of the database holding the metric data, but CA Support cannot release the details of the SQL commands to run to gather it as directly editing or querying the database isn't officially supported. Any database edits/queries are done "at your own risk".
If I have misunderstood and you need assistance with a different type of report, please clarify the details for me and I'll be happy to assist you further.
Sincerely,
Dustin Dauncey
Support Engineer, Global Customer Success
Email: API-Support@ca.com
Phone: +1 800 225 5224
Outside of North America - ca.com/us/worldwide.aspx
CA API Management Community: ca.com/talkapi