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

# Multi-File RAG API

> Search for embeddings relevant to a query across multiple uploaded files simultaneously.

### Request Body

**Content-Type**: `application/json`

```json theme={null}
{
  "query": "string",                // Query to search across multiple files
  "file_ids": ["string", "string"], // Array of multiple file UUIDs to search in
  "k": 3                           // Optional: Number of related chunks to return (default: 3)
}

```

### Authentication

Before making requests to the AI Tutor RAG API, you need to obtain your API key from your dashboard.

Example Request

```json theme={null}
const res = await fetch("https://rag-api-llm.up.railway.app/embeddings", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "authorization": apiKey,
  },
  body: JSON.stringify({
    query: "tell me about ross and nice art",
    file_ids: [
      "387dffa2-5f6c-4ad0-8d27-fb0ea0cbff83",
      "38b5d591-77c7-4612-a88c-ee1eaebba7bf"
    ]
  }),
});

```

### Response

```json theme={null}
{
  "success": true,
  "documents": [
    {
      "content": "Ross created a beautiful painting of mountain landscapes.",
      "file_id": "387dffa2-5f6c-4ad0-8d27-fb0ea0cbff83",
      "score": "0.89"
    },
    {
      "content": "The art gallery featured nice contemporary pieces.",
      "file_id": "38b5d591-77c7-4612-a88c-ee1eaebba7bf",
      "score": "0.76"
    }
  ]
}


```

### Error Responses

```json theme={null}


{
  "success": false,
  "error": {
    "message": "Invalid API key provided",
    "code": "unauthorized"
  }
}


```

```json theme={null}



{
  "success": false,
  "error": {
    "message": "No file IDs provided",
    "code": "invalid_request"
  }
}


```

```json theme={null}



{
  "success": false,
  "error": {
    "message": "One or more file IDs are invalid",
    "code": "invalid_file_ids"
  }
}
```