A philosophical enumeration written in Judaeo-Arabic inside a commentary on a legal text is not, on the face of it, destined for daily recitation. Two poetic reworkings did the work. The first is the Ani Maamin, thirteen short sentences each beginning I believe with perfect faith, which reduce each principle to a line and appear in prayer books as an appendix to the morning service. The second is Yigdal, a metrical hymn, usually attributed to a fourteenth-century Italian poet, which sets the same thirteen in verse and is sung at the close of services in many communities.
Neither is Maimonides. Both compress, and the compression changes things: the twelfth principle in its Ani Maamin form, on awaiting the Messiah though he tarry, has a weight in Jewish memory that the philosophical original does not carry, largely because of the melodies attached to it. The hymn form travelled further than the treatise ever could.
The result is a Judaism that recites a creed while continuing to hold that it has none. Both statements are defensible. There is no council, no subscription, no ordination oath and no agreed penalty for dissent, and Marc Shapiro has assembled a long list of respected authorities who held positions Maimonides declared heretical. There is also a text, in the prayer book, said aloud, listing what a Jew believes.