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Custom Model API (Advanced Users) ​

This guide explains how to use the built-in LLM integration in Liii STEM.

Setup ​

Supported models ​

Currently supported:

Pandoc (Linux only) ​

On Linux, install pandoc before using the plugin:

bash
# Ubuntu
sudo apt-get install pandoc

Then update the LLM plugin in Liii STEM:

update_plugin

Liii STEM includes built-in SiliconFlow and DeepSeek API support. You can use built-in models with no extra configuration.

See: AI Automatic Typesetting

You can also configure your own API keys:

SiliconFlow API key ​

Step 1: Create an account ​

Website: https://cloud.siliconflow.cn/i/h8qNv0VJ

After registration, generate and copy your API key:

api_key

Step 2: Configure key in Liii STEM ​

Open Help -> Plugins -> LLM.

help_llm

Open llm_zh.tm.

llm_zh

Paste your API key and save.

insert_api_key

Then click Literate -> Build buffer.

DeepSeek API key ​

Step 1: Create an account ​

Go to DeepSeek API Keys, create a key, and copy it.

deepseek_api

Step 2: Configure key in Liii STEM ​

Open Help -> Plugins -> LLM.

help_llm

Open llm_zh.tm.

llm_zh

Paste your API key and save.

deepseek_api_key

Then click Literate -> Build buffer.

Proxy configuration ​

In some network environments, you may need a proxy for API access. Liii STEM supports per-provider proxy settings.

You can configure proxies in:

  • Help -> Plugins -> LLM documentation
  • $HOME/.liii_llm_key.json

JSON format ​

json
"<provider-domain>": {
  "api-key": "<your-api-key>",
  "proxy": {
    "http": "<http-proxy-url>",
    "https": "<https-proxy-url>"
  }
}

Example for OpenAI ​

json
"openai.com": {
  "api-key":"Fill in your secret key here",
  "proxy":{
    "http":"http://127.0.0.1:7890",
    "https":"http://127.0.0.1:7890"
  }
}

Disable proxy ​

Either:

  1. Set "proxy": {}
  2. Remove the proxy field

Apply configuration ​

If edited in Liii STEM help docs:

  1. Click Literate -> Build buffer
  2. Restart Liii STEM

If edited in $HOME/.liii_llm_key.json:

  1. Save the file
  2. Restart Liii STEM

Common proxy issues ​

1) Connection timeout ​

  • Check whether the proxy client is running
  • Try a different route
  • Verify proxy address and port
  • Check firewall/security software interception

2) API call errors ​

  • If you configured an HTTPS proxy endpoint like https://127.0.0.1:7890, make sure your proxy server supports HTTPS proxy protocol.
  • Most local clients (Clash, V2RayN, Shadowsocks) expose HTTP or SOCKS ports, not HTTPS proxy ports.
  • Validate JSON syntax (commas, quotes, braces).