Mo. Rev. Stat. § 408.095: Charging interest of more than two percent per month a misdemeanor, exceptions.

Every person or persons, company, corporation or firm, and every agent of any person, persons, company, corporation* or firm, who shall take or receive, or agree to take or receive, directly or indirectly, by means of commissions of brokerage charges, or otherwise, for the forbearance or use of money or other commodities, any interest at a rate greater than two percent per month, except as permitted by the laws of this state, shall be deemed guilty of a misdemeanor. Nothing herein contained shall be construed as authorizing a higher rate of interest than is now provided by law.