I correct your English.

I want a free AI grammar checker. What options are available? All services require payment to access full functionality.

Explanation:

1. "I wanna" should be changed to "I want" for proper grammar.
2. "Free AI grammarai grammar checker" should be corrected to "free AI grammar checker" for clarity and accuracy.
3. "What options are there?" is corrected to "What options are available?" for better phrasing and clarity.
4. "All services are need to paid to use full function" should be changed to "All services require payment to access full functionality" for correct grammar and clarity.