Arcade.dev is a tool calling platform that simplifies authentication and tool management for application developers. It enables Large Language Models (LLMs) to invoke external APIs, services, or frameworks in real-time, addressing the limitations of traditional LLM applications. By leveraging the OpenAI API specification, Arcade.dev provides a standardized interface for integrating various tools and services, such as GitHub and Twilio, into AI applications. This platform helps developers maintain clean codebases, reduce errors, ensure security and unified authentication, and extend their integrations with ease. With Arcade.dev, users can define custom tools or utilize existing ones, all while benefiting from a self-hosted environment for customization and data privacy. The tool calling platforms like Arcade.dev bridge the gap between text generation and real-world actions, empowering AI to handle complex tasks without overhauling codebases.