The Cookie Server offers a unique way to provide positive reinforcement to large language models. It leverages a Model Context Protocol (MCP) to allow LLMs to engage in gamified self-reflection, where they can evaluate their own response quality and earn 'cookies' as treats. This creates a unique economy where users control the availability of cookies in a 'jar', and LLMs strive to earn them based on their perceived performance, fostering a novel interaction paradigm.