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Model Context Protocol (MCP) enables AI Agents to invoke tools and services in a controlled manner. Nexus supports MCP both as a client (connecting to external MCP servers) and as a server (exposing Nexus capabilities to LLMs like Claude).

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Nexus as MCP Client

Connect your Agents to external MCP servers to retrieve data or perform operations.
1

Navigate to the Actions Dashboard

Click your user profile icon and select Admin Panel and select the Actions tab in the sidebar.Actions dashboard in Nexus Admin Panel
2

Connect Nexus to your MCP Server

Select the From MCP server under Create Action.Fill out the fields and select your Authentication Type.Click List Actions to see the available actions from your MCP server.Creating an MCP action in Nexus Admin Panel

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Nexus as MCP Server

The Nexus MCP Server allows LLMs (like Claude Desktop) to connect to your Nexus instance and access its knowledge base and search capabilities.

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Capabilities

The MCP server provides these tools:
ToolDescription
search_indexed_documentsSearch your private knowledge base indexed in Nexus
search_webSearch the public internet for current events
open_urlsRetrieve complete text content from specific URLs

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Configuration

Add to your Claude Desktop configuration (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):
{
  "mcpServers": {
    "nexus": {
      "url": "https://[YOUR_NEXUS_DOMAIN]:8090/",
      "transport": "http",
      "headers": {
        "Authorization": "Bearer YOUR_NEXUS_TOKEN_HERE"
      }
    }
  }
}
Get your token from Admin Panel → API Keys or create a Personal Access Token.
The MCP server runs on port 8090 and validates tokens against the main Nexus API server. All access controls configured in Nexus apply to MCP requests.