Is it possible to integrate with an external system?

 Following are the use cases:
1) Getting an input e.g. name from the website and show a simple customized welcome message like "Welcome <name> to our quiz show"
2) Sending an output e.g. quiz score at the end of the quiz.
Please suggest.

3) I am actually planning to integrate the animations with our portal
and therefore the name will be passed from our portal as an input parameter
using JavaScript or NodeJS script etc. We don't want to capture the name
within the animation.

4) And for the quiz result, we wanted to be returned to our portal
preferably using a REST API or if it is possible to update a database table
directly from the animation. we are using the PostgreSQL database.

Please suggest.
Regards
Anit