Opera Omnia MCP server

Opera Omnia MCP Server provides access to a comprehensive library of JSON datasets from the Opera Omnia project. This server allows you to retrieve creative content for games, storytelling, and bot development through an MCP (Model Context Protocol) interface.

Installation

To get started with the Opera Omnia MCP Server:

1. Clone the repository
2. Install dependencies:

npm install

3. Build the project:

npm run build

Running the Server

Start the server with:

npm start

MCP Configuration

Add the following to your MCP settings file:

{
  "mcpServers": {
    "opera-omnia": {
      "command": "node",
      "args": ["path/to/opera-omnia-mcp/build/index.js"],
      "disabled": false,
      "autoApprove": []
    }
  }
}

Replace path/to/opera-omnia-mcp with the actual path to your project directory.

Features and Capabilities

The Opera Omnia MCP Server provides several tools for accessing and manipulating datasets:

List Categories

Retrieve all available data categories:

const result = await use_mcp_tool({
  server_name: "opera-omnia",
  tool_name: "list_categories",
  arguments: {}
});

List Datasets

Get all datasets within a specific category:

const result = await use_mcp_tool({
  server_name: "opera-omnia",
  tool_name: "list_datasets",
  arguments: {
    category: "characters"
  }
});

Get Complete Dataset

Retrieve the entire contents of a specific dataset:

const result = await use_mcp_tool({
  server_name: "opera-omnia",
  tool_name: "get_dataset",
  arguments: {
    category: "characters",
    dataset: "personalities"
  }
});

Get Random Item

Select a random item from a dataset:

const result = await use_mcp_tool({
  server_name: "opera-omnia",
  tool_name: "get_random_item",
  arguments: {
    category: "characters",
    dataset: "personalities"
  }
});

Filter Items

Get items matching specific criteria:

const result = await use_mcp_tool({
  server_name: "opera-omnia",
  tool_name: "get_filtered_items",
  arguments: {
    category: "characters",
    dataset: "personalities",
    filter: "brave"
  }
});

Combine Datasets

Combine multiple datasets and retrieve random selections:

const result = await use_mcp_tool({
  server_name: "opera-omnia",
  tool_name: "combine_datasets",
  arguments: {
    datasets: [
      { category: "characters", dataset: "personalities" },
      { category: "characters", dataset: "backstories" }
    ],
    count: 3
  }
});

Generate Creative Content

Create content using templates and multiple datasets:

const result = await use_mcp_tool({
  server_name: "opera-omnia",
  tool_name: "generate_content",
  arguments: {
    template: "A {adjective} {class} must {quest} to obtain {artifact}",
    datasets: {
      adjective: { category: "attributes", dataset: "adjectives" },
      class: { category: "rpg", dataset: "classes" },
      quest: { category: "situations", dataset: "quests" },
      artifact: { category: "equipment", dataset: "artifacts" }
    }
  }
});

Using MCP Resources

You can also access data through URI-style resource paths:

List All Categories

const result = await access_mcp_resource({
  server_name: "opera-omnia",
  uri: "opera-omnia://categories"
});

List Datasets in a Category

const result = await access_mcp_resource({
  server_name: "opera-omnia",
  uri: "opera-omnia://category/characters"
});

Get Dataset Contents

const result = await access_mcp_resource({
  server_name: "opera-omnia",
  uri: "opera-omnia://dataset/characters/personalities"
});

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "opera-omnia" '{"command":"node","args":["path/to/opera-omnia-mcp/build/index.js"],"disabled":false,"autoApprove":[]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "opera-omnia": {
            "command": "node",
            "args": [
                "path/to/opera-omnia-mcp/build/index.js"
            ],
            "disabled": false,
            "autoApprove": []
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "opera-omnia": {
            "command": "node",
            "args": [
                "path/to/opera-omnia-mcp/build/index.js"
            ],
            "disabled": false,
            "autoApprove": []
        }
    }
}

3. Restart Claude Desktop for the changes to take effect