Codex

Use ZoneToken with Codex — both the VSCode extension and the CLI read the same configuration files under ~/.codex/.

1. Provider config

Edit the file ~/.codex/config.toml:

# ZoneToken Configuration for Codex CLI
model = "gpt-5.5"
model_provider = "zonetoken"

[model_providers.zonetoken]
name = "zonetoken"
base_url = "https://api.zonetoken.net/v1"
wire_api = "responses"

[agents.subagent]
model = "gpt-5.5"

2. Authentication

Edit the file ~/.codex/auth.json:

{
  "auth_mode": "apikey",
  "OPENAI_API_KEY": "<apiKey>"
}

Replace the placeholder

Set OPENAI_API_KEY to your real ZoneToken API key in place of <apiKey>.

VSCode extension vs CLI

Both surfaces share the files above:

• CLI — run codex in your terminal; it reads ~/.codex/config.toml and ~/.codex/auth.json automatically.
• VSCode extension — install the Codex extension; it uses the same ~/.codex/ configuration, so no extra setup is required once the files above are in place.