If I HAD to estimate, I would say it'll be about 6-8 weeks until the API is fully merged. So closeish to 2-3 months. But, I really don't want to estimate.
I doubt it will be less than 2 weeks. But it could be as short as 2-3 weeks.
The API is being written & tested (as in unit tests written) & reviewed (as in code review) ENTIRELY by volunteers, and the important thing is that it works, and is secure. So it will take how long it takes.
Source: Am reading every ticket & about 90% of comments that get contributed to the kbin repo, but not super active in the Matrix chat atm
shepherd