Answered by Shaykh Faraz Rabbani
During prayer, can one read Ayatul Kursi as a sura after Sura Fatihah?
It is permitted to limit oneself to Ayat al-Kursi after the Fatiha.
The wajib of recitation is, “the extent of 3 short suras of the Qur’an.” [Radd al-Muhtar] Ayat al-Kursi (Qur’an, 2: 255) is longer than this.
And Allah alone gives success.