Api vs implementation - You mean in the dependency phase? If yes, then ok.
List of external plugins or dependencies:
com.android.application
com.android.library
kotlin-android
kotlin-kapt
maven
kotlin-android-extensions
com.android.tools.build:gradle:3.5.1
org.jetbrains.kotlin:kotlin-gradle-plugin
com.google.android.gms:strict-version-matcher-plugin:1.2.0
com.google.gms:google-services:4.3.2
com.google.firebase:perf-plugin:1.3.1
io.fabric
com.google.android.gms.strict-version-matcher-plugin
com.google.firebase.firebase-perf
io.fabric.tools:gradle:1.28.1
com.google.gms.google-services