Gantt MCP
One command

Gantt charts in Codex CLI

CLI — one command, OAuth in the browser

Add the server once and Codex CLI can schedule a whole project for you — dependencies, working calendars, resource levelling and critical path — then hand back a shareable chart plus PNG, SVG and CSV exports.

Set it up in 5 steps

Requires: A recent @openai/codex. Streamable HTTP and MCP OAuth are native now, so do not set the old experimental_use_rmcp_client flag — it no longer exists.

  1. Update Codex CLI so native streamable-HTTP MCP transport and MCP OAuth are available.

    bash
    npm install -g @openai/codex
codex --version

  2. Add the remote server. Codex writes the entry to the global config, then immediately runs OAuth discovery and opens your browser to consent.

    bash
    codex mcp add gantt --url https://gantt.nare.li/api/mcp

  3. If it prints "MCP server may or may not require login", run the login flow explicitly.

    bash
    codex mcp login gantt

  4. Confirm the server is registered and authenticated.

    bash
    codex mcp list

  5. Equivalent hand-written config if you prefer editing the file directly. Only `url` is required; `auth = "oauth"` is already the default and is shown here for clarity.

    ~/.codex/config.toml
    [mcp_servers.gantt]
url = "https://gantt.nare.li/api/mcp"
auth = "oauth"
startup_timeout_sec = 20

Official documentation ↗

Once it is connected

Ask Codex CLI: “Plan a 6-week website rebuild for a team of four and give me the chart.”

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