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Codex CLI uses ~/.codex/config.toml for MCP configuration.

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HTTP example

[mcp_servers.pwno-mcp]
url = "http://127.0.0.1:5500/mcp"

​
stdio example

[mcp_servers.pwno-mcp]
command = "docker"
args = [
  "run",
  "--rm",
  "-i",
  "--cap-add=SYS_PTRACE",
  "--cap-add=SYS_ADMIN",
  "--security-opt",
  "seccomp=unconfined",
  "--security-opt",
  "apparmor=unconfined",
  "-v",
  "/ABSOLUTE/PATH/TO/YOUR/PROJECT/workspace:/workspace",
  "ghcr.io/pwno-io/pwno-mcp:latest",
  "--stdio"
]

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Check configuration

codex mcp list