# External (non-OpenAI) Pull Request Requirements Currently, mcp server fail to start with: ``` 🖐 MCP client for `<CLIENT>` failed to start: missing field `user_agent` ```` It isn't clear to me yet why this is happening. My understanding is that this struct is simply added as a new field to the response but this should fix it until I figure out the full story here. <img width="714" height="262" alt="CleanShot 2025-09-10 at 13 58 59" src="https://github.com/user-attachments/assets/946b1313-5c1c-43d3-8ae8-ecc3de3406fc" />