Vyos

CI codecov PyPI Python License: MIT

MCP server for VyOS router management via the HTTPS REST API. Provides both router management tools and live VyOS documentation lookup.

Installation

pip install mcp-server-vyos

Configuration

Set environment variables:

• VYOS_URL — Router API endpoint (e.g., https://vyos.example.com)
• VYOS_API_KEY — API key for authentication
• VYOS_READ_ONLY — Set to true to disable all mutating tools (config changes, reboot, poweroff, etc.)

VyOS Router Setup

Enable the HTTPS API on your VyOS router:

configure
set service https api keys id my-mcp-key key <your-api-key>
set service https api rest
commit
save

Claude Code

Add to your MCP client configuration:

{
  "mcpServers": {
    "vyos": {
      "command": "mcp-server-vyos",
      "env": {
        "VYOS_URL": "https://vyos.example.com",
        "VYOS_API_KEY": "your-api-key"
      }
    }
  }
}

Read-Only Mode

For safe, query-only access (monitoring, investigation, documentation lookup), enable read-only mode:

{
  "mcpServers": {
    "vyos": {
      "command": "mcp-server-vyos",
      "env": {
        "VYOS_URL": "https://vyos.example.com",
        "VYOS_API_KEY": "your-api-key",
        "VYOS_READ_ONLY": "true"
      }
    }
  }
}

This registers only non-mutating tools: vyos_info, vyos_retrieve, vyos_return_values, vyos_exists, vyos_config_diff, vyos_config_history, vyos_show, vyos_traceroute, vyos_interface_stats, vyos_system_resources, vyos_route_table, vyos_firewall_stats, vyos_bgp_summary, vyos_docs_search, and vyos_docs_read.

Tools

Router Management

Tool	Description
vyos_info	System info (no auth required)
vyos_retrieve	Read configuration at a path
vyos_return_values	Get multi-valued config node values
vyos_exists	Check if a config path exists
vyos_config_diff	Show config differences (saved vs running, or by revision)
vyos_config_history	List config revision history (number, timestamp, user, method)
vyos_show	Run operational show commands
vyos_validate	Validate config syntax (temporary apply with auto-rollback)
vyos_configure	Apply config with commit-confirm (safe default)
vyos_confirm	Confirm a pending commit-confirm
vyos_save	Save running config to disk
vyos_load	Load a configuration file
vyos_merge	Merge config file or string into running config
vyos_generate	Generate keys, certificates, etc.
vyos_reset	Reset operations
vyos_reboot	Reboot the router
vyos_poweroff	Power off the router
vyos_image_add	Add a system image from URL
vyos_image_delete	Delete a system image

Diagnostics

Tool	Description
vyos_traceroute	Traceroute to a host (structured mtr report)
vyos_interface_stats	Interface RX/TX counters, errors, and link state
vyos_system_resources	CPU, memory, storage, and uptime snapshot
vyos_route_table	Routing table (RIB) by family/protocol (show ip route)
vyos_firewall_stats	Firewall and NAT rule hit counters
vyos_bgp_summary	BGP neighbor summary (state, prefixes received)

Documentation

Tool	Description
vyos_docs_search	Search VyOS docs by topic and page content (returns snippets)
vyos_docs_read	Read a specific documentation page

Documentation is fetched live from the vyos-documentation repository, so it stays in sync with the latest VyOS releases. Results are cached for 1 hour.

Safety

• Configuration changes use commit-confirm by default -- changes auto-revert after 5 minutes unless confirmed with vyos_confirm
• vyos_configure accepts a list of operations applied atomically in one commit-confirm -- batch related changes into a single call so they commit or roll back together
• Destructive operations (vyos_reboot, vyos_poweroff, vyos_image_delete) include warning descriptions
• API keys are never logged or included in tool outputs
• Self-signed TLS certificates are accepted by default (common on VyOS)

Development

uv venv && source .venv/bin/activate
uv pip install -e ".[dev]"
pytest
ruff check .

License

MIT