OpenAI Codex

The Codex CLI lets you run prompts from the terminal using the v0-1.0-md model over the v0 API.

Prerequisites

• You have Node.js installed.

Install Codex CLI

Install Codex globally:

npm install -g @openai/codex

Set your API key

Set your v0 API key as an environment variable:

export V0_API_KEY="your-api-key-here"

You can add this line to your shell profile (e.g. ~/.zshrc or ~/.bashrc) for persistence.

Configure Codex

Create a config file at ~/.codex/config.json:

{
  "providers": {
    "vercel": {
      "name": "Vercel",
      "baseURL": "https://api.v0.dev/v1",
      "envKey": "V0_API_KEY"
    }
  }
}

Make sure the envKey matches the V0_API_KEY environment variable.

Run Codex

You can now run Codex using the v0-1.0-md model:

codex --provider vercel --model v0-1.0-md

This will open a prompt in your terminal where you can interact with the model.

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