Codex CLI
Configure Codex CLI to use Essevin's OpenAI Responses compatible API.
Codex CLI is OpenAI's coding agent. One-click setup is recommended; manual setup changes one configuration file.
Recommended: one-click setup
Select a plan key
Sign in to the console, open Key Management, and find an OpenAI / Codex plan key.
Generate the setup command
Select One-click integration, then choose Codex CLI and your operating system.
Run and verify
Run the command in a terminal. When it completes, reopen the terminal and run codex.
For a graphical setup, follow the CC Switch guide, select Import CCS beside the key, and choose Codex CLI.
Manual setup: edit config.toml
| System | Configuration file |
|---|---|
| macOS / Linux | ~/.codex/config.toml |
| Windows | C:\Users\your-name.codex\config.toml |
Create the file if it does not exist, then add:
model_provider = "essevin"
model = "gpt-5.5"
[model_providers.essevin]
name = "Essevin"
base_url = "https://api.essevin.com/v1"
wire_api = "responses"
requires_openai_auth = trueSet the key and start Codex:
export OPENAI_API_KEY=sk-your-key
codexUse a Codex plan key from a Codex Plus or Codex Pro group. See Troubleshooting when setup fails.