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Setting Up 9router Gateway & Model Context Protocol (MCP) in OpenCode

February 20, 2026

Combining local multi-LLM routing with Model Context Protocol (MCP) turns AI CLI tools like OpenCode into full-fledged infrastructure and development agents.

1. Configuring 9router Gateway in OpenCode

9router acts as a local proxy gateway (http://127.0.0.1:20128/v1) using @ai-sdk/openai-compatible. It routes model aliases to specialized LLM combos:

  • 9router/codegen-combo – Primary agent for building and complex refactoring.
  • 9router/quick-combo – Lightweight agent for fast codebase exploration (explorer subagent).
{
  "provider": {
    "9router": {
      "npm": "@ai-sdk/openai-compatible",
      "options": {
        "baseURL": "http://127.0.0.1:20128/v1",
        "apiKey": "sk-7808cd13d16801d8-2hfyu1-45f240fe"
      },
      "models": {
        "codegen-combo": { "name": "codegen-combo" },
        "quick-combo": { "name": "quick-combo" }
      }
    }
  },
  "model": "9router/codegen-combo"
}

2. Integrating Local MCP Servers

Model Context Protocol (MCP) gives OpenCode direct access to external tools and live infrastructure:

Active MCP Integrations

  1. MikroTik MCP (mcp-server-mikrotik): Allows AI agents to query and configure network interfaces, firewall rules, and routes over SSH (192.168.88.1:22).
  2. CodeGraph MCP (codegraph serve --mcp): Provides instant 1-call knowledge graph exploration of repository symbols and call paths.
  3. Playwright MCP (@playwright/mcp@latest): Enables browser automation and UI testing directly from CLI agent prompts.
  4. Shadcn & 21st.dev MCP: Fetches component definitions and modern UI design system primitives.
{
  "mcp": {
    "mikrotik": {
      "type": "local",
      "command": ["uvx", "mcp-server-mikrotik"],
      "environment": {
        "MIKROTIK_HOST": "192.168.88.1",
        "MIKROTIK_PORT": "22"
      },
      "enabled": true
    },
    "codegraph": {
      "type": "local",
      "command": ["codegraph", "serve", "--mcp"],
      "enabled": true
    }
  }
}

Summary

With 9router handling resilient LLM failovers and MCP providing real-time infrastructure tools, OpenCode can inspect network topologies, execute code refactoring, and run automated browser checks within a single session.

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