Install LLMKit in LM Studio

What you need first

• LM Studio, installed.
• Nothing else: the server runs on its publisher's machines and LM Studio connects to it.
• Your own values for YOUR_X_RAPIDAPI_KEY,YOUR_X_RAPIDAPI_HOST.

Steps

1. In LM Studio, open the Program tab and choose Install › Edit mcp.json.
2. Add this block. If the file already has mcpServers, add only the entry inside it.

{
  "mcpServers": {
    "llmkit": {
      "url": "https://llmkit-token-counter-rag-chunker-json-repair.p.rapidapi.com/mcp",
      "headers": { "X-RapidAPI-Key": "YOUR_X_RAPIDAPI_KEY", "X-RapidAPI-Host": "YOUR_X_RAPIDAPI_HOST" }
    }
  }
}

3. Replace YOUR_X_RAPIDAPI_KEY,YOUR_X_RAPIDAPI_HOST with your own values.
4. Save the file and restart LM Studio.

Check it worked

Ask LM Studio: List the tools of llmkit.

If it does not start

401 Unauthorized

The endpoint wants a sign-in or a key. Sign in when LM Studio asks, or check the value in place of the placeholder.

The server starts, but its tools fail

A YOUR_… placeholder is still in the config, or its value is wrong.

Nothing changes after a restart

The file is not valid JSON any more. Look for a missing comma where the block was added.