Is the denier of intercession an infidel, and is this by consensus or is it disputed?

Whoever denies a matter known to be an essential part of the religion by scholarly consensus, or denies a single letter from the Book of Allah, or a mutawatir (mass-transmitted) sunnah out of rejection, is considered a disbeliever. The same applies to one who denies the definitive implication of a text if it is among what is known to be an essential part of the religion. Scholars differed concerning deeming one who denies a khabar al-ahad (solitary report) authentically transmitted from the Messenger of Allah, peace be upon him, a disbeliever. The correct view is that he is a disbeliever if he believes in its authenticity and is not making an interpretation. The denial that leads to disbelief is a denial of rejection (juhood), not an interpretation (ta’weel).

Intercession (shafa'ah) is established by mutawatir (mass-transmitted) evidence, and whoever denies it is considered a heretic (zindiq). The Grand Intercession (al-shafa'ah al-kubra) is agreed upon, while the disagreement lies in the intercession of the Prophet, peace be upon him, for those who committed major sins, which has been denied by innovators.

It is not permissible to rule a specific individual who denies intercession as a disbeliever before establishing the proof against him and removing any doubt.