Unable to use ACE MCP.

Open 💬 2 comments Opened Feb 27, 2026 by haoqinghai

What version of the Codex App are you using (From “About Codex” dialog)?

26.226.940 (720)

What subscription do you have?

team

What platform is your computer?

Darwin 24.6.0 arm64 arm

What issue are you seeing?

"When I try to use ace mcp in the Codex app, I get the error: 'Error calling tool codebase-retrieval: This directory cannot be dynamically indexed for security reasons.' However, it works perfectly fine in Cursor APP."

<img width="862" height="111" alt="Image" src="https://github.com/user-attachments/assets/b2a80166-7246-4f90-bf8a-8a5f5bc80805" />

What steps can reproduce the bug?

"Configure Auggie ACE MCP to allow the agent to search the codebase."

What is the expected behavior?

_No response_

Additional information

_No response_

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