form inline validation address using api

Applicant enters home address text field (zip code and city is prefilled from previous step in the funnel), onblur we want to do inline validation.

As part of inline validation, want to check if address is valid and residential.

Have lots of applicants using android or ios to fill out the form.

3rd party api providers (that do is_valid & is_residential) are saying that their 98th percentile response latency in north-east is about 200 ms. We have applicants all over usa.

Is anyone using such kind of inline validation using 3rd party api? Should we do it?

TIA.