OpenAI adds full MCP support to ChatGPT Developer Mode
On October 13 2025, OpenAI released full support for the Model Context Protocol (MCP) inside ChatGPT’s Developer Mode, allowing secure read-and-write connections between the chatbot and external systems. This turns ChatGPT into an automation hub able to fetch data, trigger actions, and integrate with enterprise tools. Benefit: developers can build custom workflows without complex APIs. Significance: a key step toward embedding intelligent agents directly into business operations.