From what I have seen, other than tachanun (nefilat apayim) the chazzan stands for the entire davening. Why is this so? Why not sit for things like krias shema?
- Anybody can ask a question
- Anybody can answer
- The best answers are voted up and rise to the top
This is addressed by the gemarah Yerushalmi Sotah 7:4 which learns the idea out of the pasuk in Devarim 27:26
The gemarah explains that the standing (up) of the torah implies that the Chazzan should stand.
CF Ramban ad loc who seems to apply this only to the lifting of the torah (hagbah) but I believe the plain reading of the gemarah supports my answer.
He is the the Shliach - the emissary - to the King, so to speak, and a emissary always stands before a king.