lobehub/docs/self-hosting/environment-variables/basic.mdx
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---
title: Customize LobeChat Deployment with Environment Variables
description: >-
Learn about the common environment variables used to customize LobeChat
deployment, including access code, OAuth SSO, base path, and default agent
configuration.
tags:
- LobeChat
- environment variables
- deployment
- access code
- OAuth SSO
- base path
- default agent configuration
---
# Environment Variables
LobeChat provides some additional configuration options during deployment, which can be customized using environment variables.
## Common Variables
### `ACCESS_CODE`
- Type: Optional
- Description: Add a password to access the LobeChat service. You can set a long password to prevent brute force attacks.
- Default: -
- Example: `awCTe)re_r74` or `rtrt_ewee3@09!`
### `API_KEY_SELECT_MODE`
- TypeOptional
- DescriptionControls the mode for selecting the API Key when multiple API Keys are available. Currently supports `random` and `turn`.
- Default`random`
- Example`random` or `turn`
When using the `random` mode, a random API Key will be selected from the available multiple API Keys.
When using the `turn` mode, the API Keys will be retrieved in a polling manner according to the specified order.
### `NEXT_PUBLIC_BASE_PATH`
- Type: Optional
- Description: Add a `basePath` for LobeChat.
- Default: -
- Example: `/test`
### `DEFAULT_AGENT_CONFIG`
- Type: Optional
- Description: Used to configure the default settings for the LobeChat default agent. It supports various data types and structures, including key-value pairs, nested fields, array values, and more.
- Default: -
- Example: `'model=gpt-4-1106-preview;params.max_tokens=300;plugins=search-engine,lobe-image-designer'`
The `DEFAULT_AGENT_CONFIG` is used to configure the default settings for the LobeChat default agent. It supports various data types and structures, including key-value pairs, nested fields, array values, and more. The table below provides detailed information on the configuration options, examples, and corresponding explanations for the `DEFAULT_AGENT_CONFIG` environment variable:
| Configuration Type | Example | Explanation |
| --- | --- | --- |
| Basic Key-Value Pair | `model=gpt-4` | Set the model to `gpt-4`. |
| Nested Field | `tts.sttLocale=en-US` | Set the language locale for the text-to-speech service to `en-US`. |
| Array | `plugins=search-engine,lobe-image-designer` | Enable the `search-engine` and `lobe-image-designer` plugins. |
| Chinese Comma | `plugins=search-enginelobe-image-designer` | Same as above, demonstrating support for Chinese comma separation. |
| Multiple Configurations | `model=glm-4;provider=zhipu` | Set the model to `glm-4` and the model provider to `zhipu`. |
| Numeric Value | `params.max_tokens=300` | Set the maximum tokens to `300`. |
| Boolean Value | `enableAutoCreateTopic=true` | Enable automatic topic creation. |
| Special Characters | `inputTemplate="Hello; I am a bot;"` | Set the input template to `Hello; I am a bot;`. |
| Error Handling | `model=gpt-4;maxToken` | Ignore invalid entry `maxToken` and only parse `model=gpt-4`. |
| Value Override | `model=gpt-4;model=gpt-4-1106-preview` | If a key is repeated, use the value that appears last; in this case, the value of `model` is `gpt-4-1106-preview`. |
Further reading:
- [[RFC] 022 - Default Assistant Parameters Configuration via Environment Variables](https://github.com/lobehub/lobe-chat/discussions/913)
## Plugin Service
### `PLUGINS_INDEX_URL`
- Type: Optional
- Description: Index address of the LobeChat plugin market. If you have deployed the plugin market service on your own, you can use this variable to override the default plugin market address.
- Default: `https://chat-plugins.lobehub.com`
### `PLUGIN_SETTINGS`
- Type: Optional
- Description: Used to configure plugin settings. Use the format `plugin-name:setting-field=setting-value` to configure the settings of the plugin. Separate multiple setting fields with a semicolon `;`, and separate multiple plugin settings with a comma `,`.
- Default: `-`
- Example: `search-engine:SERPAPI_API_KEY=xxxxx,plugin-2:key1=value1;key2=value2`
The above example sets the `SERPAPI_API_KEY` of the `search-engine` plugin to `xxxxx`, and sets `key1` of `plugin-2` to `value1`, and `key2` to `value2`. The generated plugin settings configuration is as follows:
```json
{
"plugin-2": {
"key1": "value1",
"key2": "value2"
},
"search-engine": {
"SERPAPI_API_KEY": "xxxxx"
}
}
```
## Assistant Market
### `AGENTS_INDEX_URL`
- Type: Optional
- Description: Index address of the LobeChat assistant market. If you have deployed the assistant market service on your own, you can use this variable to override the default market address.
- Default: `https://chat-agents.lobehub.com`