OpenAI has announced the launch of a new Developer Mode for ChatGPT, giving Plus and Pro subscribers advanced access to the Model Context Protocol (MCP) client across all available tools. This beta feature opens up both read and write capabilities for connectors, allowing developers to build more powerful workflows and integrations. OpenAI, however, has cautioned users that “it’s powerful but dangerous and is intended for developers who understand how to safely configure and test connectors.”
Once activated through Settings → Connectors → Advanced → Developer mode, users can import MCPs by connecting to a remote server, with support for SSE and streaming HTTP protocols. Authentication options include OAuth or no authentication, depending on the developer’s requirements. The new mode gives developers greater flexibility with features such as toggling specific tools on or off, refreshing connector data, and even issuing custom prompts to call tools directly in a conversation. OpenAI recommends developers be very specific with their requests: “Be explicit: ‘Use the Acme CRM connector’s update_record tool to…’.”
To reduce risks, write actions require explicit user confirmation before they are executed. OpenAI also advises developers to carefully inspect JSON payloads before approving actions, warning that “incorrect write actions can inadvertently destroy, alter or share data.” The system is designed to respect the readOnlyHint annotation, treating any tool without it as having write capabilities by default.
Developer Mode also introduces enhanced debugging visibility, letting users see both input and output data for tools, which can be particularly helpful when testing or troubleshooting integrations. This increased transparency gives developers more control over how connectors behave and interact with ChatGPT.
OpenAI emphasizes that granting tool permissions should be done carefully and only to trusted applications. With the ability to execute write-enabled operations and control external data, this feature is meant for technically proficient users who can configure and test safely without compromising security or data integrity.
