> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nextchat.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Environment Variables

> Environment variables for selfhost deployments.

## Examples

> Few examples to get you started

### Enable `CODE` Authentication with OpenAI API Key

> Users required to input access password to use the API, they can also using their own api key to use NextChat.

| Variable Name    | Value       |
| ---------------- | ----------- |
| `CODE`           | `password1` |
| `OPENAI_API_KEY` | `sk_xxxxx`  |

### Enable OpenAI to all users who have access to your website

| Variable Name    | Value      |
| ---------------- | ---------- |
| `OPENAI_API_KEY` | `sk_xxxxx` |

### Using Azure as GPT Model Provider

| Variable Name       | Value                                                           |
| ------------------- | --------------------------------------------------------------- |
| `AZURE_URL`         | `https://{azure-resource-url}/openai/deployments/{deploy-name}` |
| `AZURE_API_KEY`     | `azure_key_123456`                                              |
| `AZURE_API_VERSION` | `2022-06-01-preview`                                            |

### Using Google Gemini Pro as Model Provider

| Variable Name    | Value               |
| ---------------- | ------------------- |
| `GOOGLE_API_KEY` | `google_key_123456` |

## Avaliable Environment Variables

| Variable Name          | Required | Default Value            | Description                                                                                                                                           | Example                                                          |
| ---------------------- | -------- | ------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------- |
| `CODE`                 | Optional |                          | Access password, separated by comma.                                                                                                                  | `password1,password2`                                            |
| `OPENAI_API_KEY`       | Required |                          | Your OpenAI API key, join multiple API keys with comma.                                                                                               | `key1,key2`                                                      |
| `BASE_URL`             | Optional | `https://api.openai.com` | Override OpenAI API request base URL.                                                                                                                 | `http://your-openai-proxy.com`                                   |
| `OPENAI_ORG_ID`        | Optional |                          | Specify OpenAI organization ID.                                                                                                                       | `org-1234`                                                       |
| `AZURE_URL`            | Optional |                          | Azure deploy URL.                                                                                                                                     | `https://{azure-resource-url}/openai/deployments/{deploy-name}`  |
| `AZURE_API_KEY`        | Optional |                          | Azure API Key.                                                                                                                                        | `azure_key_123456`                                               |
| `AZURE_API_VERSION`    | Optional |                          | Azure API Version, find it at Azure Documentation.                                                                                                    | `2022-06-01-preview`                                             |
| `GOOGLE_API_KEY`       | Optional |                          | Google Gemini Pro API Key.                                                                                                                            | `google_key_123456`                                              |
| `GOOGLE_URL`           | Optional |                          | Google Gemini Pro API URL.                                                                                                                            | `https://googleapis.com/gemini/v1`                               |
| `HIDE_USER_API_KEY`    | Optional | Empty                    | If you do not want users to input their own API key, set this value to 1.                                                                             | `1`                                                              |
| `DISABLE_GPT4`         | Optional | Empty                    | If you do not want users to use GPT-4, set this value to 1.                                                                                           | `1`                                                              |
| `ENABLE_BALANCE_QUERY` | Optional | Empty                    | If you do want users to query balance, set this value to 1, or you should set it to 0.                                                                | `1`                                                              |
| `DISABLE_FAST_LINK`    | Optional | Empty                    | If you want to disable parse settings from URL, set this to 1.                                                                                        | `1`                                                              |
| `CUSTOM_MODELS`        | Optional | Empty                    | To control custom models, use `+` to add a custom model, use `-` to hide a model, use `name=displayName` to customize model name, separated by comma. | `+llama,+claude-2,-gpt-3.5-turbo,gpt-4-1106-preview=gpt-4-turbo` |