nexus

Overview

Nexus serves as a central hub for managing all your AI infrastructure, allowing you to connect multiple MCP servers (via STDIO, SSE, or HTTP) and various LLM providers through a single endpoint. It provides intelligent tool search across all connected resources, enabling context-aware discovery and execution. With built-in security features like OAuth2, CORS, CSRF protection, and flexible rate limiting, it offers enterprise-grade governance for AI deployments. The TOML-based configuration with environment variable substitution makes it easy to set up and customize for different environments.

Try asking AI

After installing, here are 6 things you can ask your AI assistant:

• mcp_search

  Intelligent fuzzy search across all connected MCP tools using natural language queries

  Try:Find tools that can help me analyze dataTry:Search for GitHub-related functionalityTry:Look for file management tools
• llm_openai

  Access OpenAI models through Nexus with full tool calling support

  Try:Use GPT-4 to summarize a documentTry:Create an image with DALL-ETry:Analyze sentiment in this text
• llm_anthropic

  Access Anthropic Claude models through Nexus with full tool calling support

  Try:Ask Claude a question about codeTry:Generate content with ClaudeTry:Get help with technical writing

Note: Tool names inferred from configuration examples and documentation of MCP server aggregation functionality. No explicit tool list found in the README.

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Installation

curl -fsSL https://nexusrouter.com/install | bash

docker pull ghcr.io/grafbase/nexus:latest

[mcp.servers.github]
url = "https://api.githubcopilot.com/mcp/"
auth.token = "{{ env.GITHUB_TOKEN }}"

[mcp.servers.filesystem]
cmd = ["npx", "-y", "@modelcontextprotocol/server-filesystem", "/home/YOUR_USERNAME/Desktop"]

{
  "mcpServers": {
    "nexus": {
      "command": "nexus",
      "args": []
    }
  }
}

FAQ

What MCP protocols does Nexus support?

Nexus supports STDIO (subprocess), SSE (Server-Sent Events), and streamable HTTP MCP servers with automatic protocol detection for remote servers.

How does Nexus handle authentication for MCP servers?

Nexus supports multiple authentication methods including service tokens, OAuth2 forwarding, and header-based authentication for both individual servers and globally.

Can Nexus be used as a load balancer for multiple LLM providers?

Yes, Nexus provides unified routing for OpenAI, Anthropic, Google, and AWS Bedrock LLM providers with full tool calling support, allowing load balancing and aggregation.

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