Using FishXCode with Codex

Video Tutorial

Install Codex

pnpm

pnpm install -g @openai/codex

npm

npm install -g @openai/codex

yarn

yarn global add @openai/codex

bunx

bunx --global @openai/codex

Configure Environment Variables

1. Visit https://fishxcode.com/console/token to obtain your API Key

2. Create ~/.codex/config.toml with this configuration:

   model_provider = "fishxcode"
   model = "gpt-5.4"
   review_model = "gpt-5.4"
   model_reasoning_effort = "medium"
   model_reasoning_summary = "detailed"
   disable_response_storage = true
   preferred_auth_method = "apikey"
   model_verbosity = "high"
   
   [model_providers.fishxcode]
   name = "OpenAI using Chat Completions"
   base_url = "https://api.fishxcode.com/v1"
   wire_api = "responses"
   requires_openai_auth = true
   
   [features]
   skills = true
   image_generation = false

3. Create ~/.codex/auth.json, setting OPENAI_API_KEY to your FishXCode API Key:

   {
     "OPENAI_API_KEY": "your_api_key_here"
   }

Launch Directly

cd my-project
codex

Using Codex in VSCode

1. Install the Codex extension
2. Access settings and switch to JSON configuration mode
3. Add these settings:

{
  "chatgpt.apiBase": "https://api.fishxcode.com/v1",
  "chatgpt.config": {
    "preferred_auth_method": "api_key",
    "model_provider": "fishxcode"
  }
}

4. Click the Codex icon to begin using it