Before you pay for public records online, be sure to check out the option that some of what you want may be available for free. I wish that all states put records on free in an easy-to-find way, but that’s not true yet.
Attorneys General and other state offices do have records online so check some of the state agencies. Licensing records are common. In some counties you can get the court schedule electronically. It really varies by state.
The best master list I’ve seen is developed by BRB Publications. It gives an alphabetical state list and when you click in on the state you can see what is available.