Using esp_efuse_mac_get_default() in IDE 2.X to get ESP8266/ESP32 MAC address

Pilot Error :flight_arrival:

Anyway, I found the API you asked about. Compiles but untested:

#include "esp_mac.h"

void setup() {
  uint8_t mac[8];
  esp_efuse_mac_get_default(mac);

}

void loop() {
}