Codex App Integration

The Codex app (desktop) does not need a separate setup inside the app. It reads the same provider configuration as Codex CLI — ~/.codex/config.toml and the environment variables from your terminal session.

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Automatic Configuration via the TerminalCopy Anchor Link

Configure Codex CLI once and the app is ready:

1. Edit ~/.codex/config.toml:

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   model_provider = "nyxos"
   model = "<exact-model-id>"
   model_reasoning_effort = "medium"
   
   [model_providers.nyxos]
   name = "Nyxos Shop"
   base_url = "https://api.nyxos.shop/v1"
   env_key = "OPENAI_API_KEY"
   wire_api = "responses"
   requires_openai_auth = false

2. Set the environment variable with your key (persistent, user scope on Windows):

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   [System.Environment]::SetEnvironmentVariable('OPENAI_API_KEY', 'sk-YOUR_NYXOS_KEY', 'User')

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   # Linux / macOS
   export OPENAI_API_KEY="sk-YOUR_NYXOS_KEY"

3. Restart the Codex app — it launches already connected to https://api.nyxos.shop with your key.

Full details in the Codex CLI guide.