Connect the Server to Codex

Outcome

Register your local MCP server so Codex can call it.

1) Build First

pnpm --filter @create-something/codex-demo-mcp build

2) Add MCP Config

Use Codex MCP management to register your local server:

codex mcp add codex-demo -- node "$(pwd)/packages/codex-demo-mcp/dist/index.js"

This writes server config to your Codex config and uses an absolute path based on the current repo.

3) Verify Registration

codex mcp get codex-demo

4) Reload Codex Session

After saving config, restart your Codex session so the new server is discovered.

5) Verify in Chat

Ask Codex:

Use the codex-demo MCP tool echo_text with text "hello from mcp".

If connected correctly, you should see a response containing Echo: hello from mcp.

Next

Continue to Test, Debug, Iterate.