I have configured Xcode 26.3RC to utilize Claude and Claude Agent. However, it does not seem to access Claude's config.json where I supply information for the MCP servers that I use with Claude.
If I manually tell Xcode to look in the config file it finds the appropriate API keys, but that's not really a usable experience.
Thanks for the post, was it working well in Xcode 26.2?
I was just a few days ago configuring Claude as well to see how it works, there are a few experts in the team and I’ll refer to their expertise as I am still in the process of learning as well.
My only suggestion when Xcode 26.3 RC isn’t automatically picking up your for Claude and MCP servers, it may be due to how the environment variables or model configurations are being handled. As I saw Claude running on the terminal, you can verify this by running in your terminal to ensure it returns the expected path. After updating environment variables or scheme settings, fully restart Xcode and any terminal sessions to ensure changes take effect. My thought is that could be permission? Ensure that Xcode and the terminal have read permissions for the and its containing directory.
Looking forward to experts here to better guidance!!
Awesome question that hopefully becomes a thread of suggestions.
Albert Pascual Worldwide Developer Relations.
Hi!
Claude Agent in Xcode uses a specific config.json file, different from a global json file you might have been using with a previous Claude Code installation.
For Claude Agent, this would be located in this directory:
~/Library/Developer/Xcode/CodingAssistant/ClaudeAgentConfig
You can find more information on our documentation
Let me know if this works!
