KingPrompt is an AI prompt engineering workbench and prompt library for engineers, developers, creators, and teams building with frontier AI models. It helps users create, customize, test, organize, and export structured prompts for coding, research, automation, content, data analysis, computer use, and voice agents. Users can browse ready-to-use prompt templates by task, including debugging, refactoring, API design, documentation, security audits, marketing, system prompts, and agent workflows. The workbench supports model-specific syntax profiles for Claude, GPT, Gemini, DeepSeek, and Grok, with configurable parameters, saved prompts, prompt synthesis, and an AI tools directory. Developers can also generate OpenAPI and JSON Schema tool definitions, database queries, Dockerfiles, React hooks, Mermaid diagrams, technical documentation, and data transformation pipelines, then contribute prompts through GitHub. KingPrompt reduces the time needed to turn an idea into a precise, reusable instruction while helping users adapt prompts to different AI models. Its combination of prompt templates, model calibration, creator submissions, and an AI ecosystem directory provides a practical alternative to standalone prompt collections.