OpenAI Adds Full MCP Tool Support in ChatGPT Developer Mode: Enabling Write Actions, Workflow Automation, and Enterprise Integrations - MarkTechPost

Editors Pick Agentic AI Model Context Protocol (MCP) New Releases Staff OpenAI Adds Full MCP Tool Support in ChatGPT Developer Mode: Enabling Write Actions, Workflow Automation, and Enterprise Integrations By Michal Sutter - September 11, 2025 OpenAI has just introduced a major upgrade to ChatGPT’s developer mode by adding full support for Model Context Protocol (MCP) tools . Until now, MCP integr.