Accessing crewai over OpenAPI for integration

Hello,
I am looking for a pattern where I can use REST API to call crewai project. Consider following pattern -
Postman ↔ CrewAI ↔ watsonx
I have running code (CrewAI ↔ watsonx) on my local where I can use terminal to execute crewai. I want to make this code available over REST API.
Can anyone help me?