ChatGPT has finally got the full Model Context Protocol (MCP) support in its developer mode. Earlier, MCP integrations were limited to read-only actions like fetching data or performing searches. However, with the recent update, MCP connectors can now perform write actions, allowing developers to modify external systems, trigger workflows, and chain complex automations directly within ChatGPT.
We’ve (finally) added full support for MCP tools in ChatGPT.
— OpenAI Developers (@OpenAIDevs) September 10, 2025
In developer mode, developers can create connectors and use them in chat for write actions (not just search/fetch). Update Jira tickets, trigger Zapier workflows, or combine connectors for complex automations. pic.twitter.com/1W0rTGGEnu
This means ChatGPT can now update Jira tickets, run Zapier workflows, or combine multiple connectors for multi-step processes like incident management and notifications. Currently, the feature is limited to ChatGPT Plus and Pro users.
Furthermore, the developer mode also allows you to register MCP connectors with read and write methods, making it possible to prototype and refine integrations directly in chat without custom middleware. Apart from that, the Enterprises can now automate internal ticketing, sync CRM data, trigger code builds, and more from a single ChatGPT interface.
In order to use the feature, developers have to enable developer mode by going to Settings > Connectors > Advanced > Developer mode and add MCP connectors that support OAuth or no authentication. According to the company, the new MCP write functionality comes with strict security and error-handling measures to ensure safe operations.
