PromptBase is an online marketplace that connects buyers and sellers of prompts for various AI models. Buyers can find high-quality prompts, save money on API costs, and improve AI performance. Sellers can monetize their skills, reach a wide audience, and get paid for their work. The platform features an easy-to-use search, advanced search filter, rating system, and secure payment system. PromptBase is a valuable resource for anyone working with AI prompts.