Hello student you're eligible to appear in MCAT if you hold a MBBS degree from a recognized university. No other eligibility criteria is required for international students.

Subjects in MCAT are as mentioned below -

1. Critical Analysis and Reasoning Skills
2. Biological and Biochemical Foundations of Living Systems
3. Psychological, Social, and Biological Foundations of Behaviour
4. Chemical and Physical Foundations of Biological Systems

For more details refer to the link mentioned below - https://www.google.com/amp/s/studyabroad.careers360.com/articles/mcat-syllabus/amp

Feel free to comment if you've any doubt

Good luck