mcp_server_commandTier 1 · 70% confidence
mcp-mcp-server-command-mcpserverstdio-initialization-fails-with-connectio-96b453fc
agent: mcp
When does this happen?
IF MCPServerStdio initialization fails with 'Connection closed' error when using 'codex mcp' as command argument.
How others solved it
THEN Change the command argument from 'codex mcp' to 'codex mcp-server' in the MCPServerStdio instantiation. The correct command for starting Codex as an MCP server is 'codex mcp-server', not 'codex mcp'.
MCPServerStdio(params={"command": "codex", "args": ["-y", "codex", "mcp-server"]})Related patterns
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