The Book of Occultation — al-Ṭūsī · Hadith 540 (#Ḥadīth #23)

ومنهم علي بن جعفر الهماني، وكان فاضلا مرضيا من وكلاء أبي الحسن وأبي محمد عليهما السلام.

And among them Ali bin Ja’far Hammani, he was an accomplished man with a pleasing personality and was a representative of Imam Hadi and Imam Hasan Askari .

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).