OpenAI has launched a powerful but risky “Developer Mode” for ChatGPT, granting paying subscribers full read-and-write access to external tools via the Model Context Protocol (MCP). We’ve (finally) added full support for MCP tools in ChatGPT. In developer mode, developers can create connectors and use them in chat for write actions (not just search/fetch). How to Use Developer Mode and Its Practical ImplicationsFor developers willing to navigate these risks, enabling the new mode is straightforward. Yet, it also places the nascent, and at times vulnerable, MCP standard at the center of a new, more dangerous frontier of AI application development.