codex can not find mcp
Open 💬 3 comments Opened Apr 27, 2026 by africa1207
💡 Likely answer: A maintainer (github-actions[bot], contributor)
responded on this thread — see the highlighted reply below.
What version of Codex CLI is running?
v0.125.0
What subscription do you have?
plus
Which model were you using?
_No response_
What platform is your computer?
Microsoft Windows NT 10.0.22631.0 x64
What terminal emulator and version are you using (if applicable)?
Windows Terminal (PowerShell)
What issue are you seeing?
[mcp_servers]
[mcp_servers.chrome-devtools]
type = "stdio"
command = "npx"
args = ["-y", "chrome-devtools-mcp@latest"]
[mcp_servers.context7]
type = "stdio"
command = "npx"
args = ["-y", "@upstash/context7-mcp", "--api-key", "my_api_key"]
[mcp_servers.mcp-deepwiki]
type = "stdio"
command = "npx"
args = ["-y", "mcp-deepwiki@latest"]
First, I can confirm that my MCP configuration is correct. I tested it using different versions of Codex, up to v0.120.0, and the AI successfully retrieved the configured MCP and made proper calls. However, starting from v0.121.0 and above, while /mcp can retrieve the MCP and its associated tools, the following calls return empty results:
• Called codex.list_mcp_resources({})
└ {"resources": []}
• Called codex.list_mcp_resource_templates({})
└ {"resourceTemplates": []}
As a result, the AI fails to recognize any MCP resources.
What steps can reproduce the bug?
MCP cannot be used with versions ≥ v0.121.0.
What is the expected behavior?
_No response_
Additional information
_No response_
3 Comments
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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I've been seeing this since 0.117.0 . 0.116.0 was the last version models from local providers ( namely Ollama in my case ) could invoke mcp tools consistently.
My workaround has been a wrapper script that runs 0.116.0 if the profile parameter isn't for gpt 5.x. If it's a gpt5.x profile, then I run the latest ( 0.125.0 at the moment ). #19871
This may be https://github.com/openai/codex/issues/20574