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OpenAI Codex CLI

OpenAI Codex CLI reads its config from ~/.codex/config.toml.

stdio

[[mcp_servers]]
name = "bridgent-hello"
command = "bridgent"
args = [
  "dev",
  "/abs/path/to/server.ts"
]

Reload Codex (/reload or restart) — add and echo show up in the tool list.

HTTP

[[mcp_servers]]
name = "bridgent-hello"
transport = "streamable-http"
url = "http://127.0.0.1:3333/mcp"

Troubleshooting

Codex doesn't see the server → check codex --version against the latest release; older builds might not yet support MCP
TOML parse error → make sure args is a string array, not a single string
See Codex CLI docs for the canonical config schema