go-unifi-mcp

go-unifi-mcp

A Model Context Protocol (MCP) server for UniFi Network Controller, written in Go.

Overview

go-unifi-mcp provides an MCP interface to UniFi Network Controller, enabling AI assistants and other MCP clients to interact with your UniFi infrastructure.

Why this exists

I couldn’t find an MCP server that supported both v1 and v2 firewall rules and IPv6, so I built one. This wraps the go-unifi library (which I trust from my Terraform provider experience) and leans on its generated API surface. The server is generated from the controller’s own API definitions, which makes it much easier to keep tool coverage up to date as UniFi evolves.

UniFi controller versioning

This project generates tools against the same UniFi Controller version pinned by go-unifi. When go-unifi updates its supported controller version, we regenerate our field definitions and tool metadata to match. We support the same controller range; see their controller support range.

Installation

Binary (GitHub Releases)

Download pre-built binaries from the Releases page. Binaries are available for macOS and Linux (amd64/arm64).

# macOS (Apple Silicon)
curl -L https://github.com/claytono/go-unifi-mcp/releases/latest/download/go-unifi-mcp_darwin_arm64.tar.gz | tar xz
sudo mv go-unifi-mcp /usr/local/bin/

# macOS (Intel)
curl -L https://github.com/claytono/go-unifi-mcp/releases/latest/download/go-unifi-mcp_darwin_amd64.tar.gz | tar xz
sudo mv go-unifi-mcp /usr/local/bin/

# Linux (amd64)
curl -L https://github.com/claytono/go-unifi-mcp/releases/latest/download/go-unifi-mcp_linux_amd64.tar.gz | tar xz
sudo mv go-unifi-mcp /usr/local/bin/

# Linux (arm64)
curl -L https://github.com/claytono/go-unifi-mcp/releases/latest/download/go-unifi-mcp_linux_arm64.tar.gz | tar xz
sudo mv go-unifi-mcp /usr/local/bin/

Homebrew

Available from the claytono/homebrew-tap tap:

brew install claytono/tap/go-unifi-mcp

Nix

# Run without installing
nix run github:claytono/go-unifi-mcp

# Install to your profile
nix profile install github:claytono/go-unifi-mcp

Docker

Multi-architecture images (amd64/arm64) are published to GitHub Container Registry.

# Latest (pinned to most recent release, rebuilt on base image updates)
docker pull ghcr.io/claytono/go-unifi-mcp:latest

# Edge (built from main on every merge, unstable)
docker pull ghcr.io/claytono/go-unifi-mcp:edge

Go Install

go install github.com/claytono/go-unifi-mcp/cmd/go-unifi-mcp@latest

Configuration

UniFi Credentials

The server requires access to a UniFi Network Controller. Two authentication methods are supported:

1. API Key (preferred): Create an API key in your UniFi controller under

Settings > Control Plane > Integrations. Set UNIFI_HOST and UNIFI_API_KEY.

1. Username/Password: Use a local admin account. Set UNIFI_HOST,

UNIFI_USERNAME, and UNIFI_PASSWORD.

Claude Desktop

Add to your claude_desktop_config.json:

Using the binary:

{
  "mcpServers": {
    "unifi": {
      "command": "/usr/local/bin/go-unifi-mcp",
      "env": {
        "UNIFI_HOST": "https://your-controller:443",
        "UNIFI_API_KEY": "your-api-key"
      }
    }
  }
}

Using Docker:

{
  "mcpServers": {
    "unifi": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "UNIFI_HOST",
        "-e",
        "UNIFI_API_KEY",
        "ghcr.io/claytono/go-unifi-mcp:latest"
      ],
      "env": {
        "UNIFI_HOST": "https://your-controller:443",
        "UNIFI_API_KEY": "your-api-key"
      }
    }
  }
}

Claude Code

claude mcp add unifi -- go-unifi-mcp

Then set the required environment variables in your shell before running claude.

Environment Variables

| Variable | Required | Default | Description | | ------------------ | -------- | --------- | ------------------------------- | | UNIFI_HOST | Yes | — | UniFi controller URL | | UNIFI_API_KEY | \ | — | API key (preferred auth method) | | UNIFI_USERNAME | \ | — | Username for password auth | | UNIFI_PASSWORD | \* | — | Password for password auth | | UNIFI_SITE | No | default | UniFi site name | | UNIFI_VERIFY_SSL | No | true | Whether to verify SSL certs | | UNIFI_LOG_LEVEL | No | error | go-unifi client log level | | UNIFI_TOOL_MODE | No | lazy | Tool registration mode |

\* Either UNIFI_API_KEY or both UNIFI_USERNAME and UNIFI_PASSWORD must be set.

Log Levels

The UNIFI_LOG_LEVEL variable controls logging from the underlying go-unifi client library. The default is error because the client otherwise emits INFO messages to stderr, which can interfere with tools like mcp-cli that parse JSON on stdout/stderr.

| Level | Description | | ---------- | ------------------------------------ | | disabled | No logging | | trace | Most verbose, including wire details | | debug | Debug messages | | info | Informational messages | | warn | Warnings only | | error | Errors only (default) |

Tool Modes

The server supports two tool registration modes, following the pattern established by unifi-network-mcp:

| Mode | Tools | Context Size | Description | | ------- | ----- | ------------ | ----------------------------------------------- | | lazy | 3 | ~200 tokens | Meta-tools only (default, recommended for LLMs) | | eager | 252 | ~55K tokens | All tools registered directly |

Lazy mode (default) registers only 3 meta-tools that provide access to 252 UniFi operations (generated from the controller API):

• tool_index - Search/filter the tool catalog by category or resource
• execute - Execute any tool by name with arguments
• batch - Execute multiple tools in parallel

This dramatically reduces context window usage while preserving full functionality. The LLM first queries the index to find relevant tools, then executes them via the dispatcher.

Eager mode registers all 252 tools directly, which may be useful for non-LLM clients or debugging but consumes significant context.

Update semantics: Updates use a read-modify-write flow against the controller API. We fetch the current resource, merge your fields, and submit the full object. This avoids clearing unspecified fields, but it is not atomic and concurrent updates can race (last write wins) because the UniFi API does not expose etags or revision IDs. In practice this is unlikely to be an issue, but it's something to be aware of.

ID Resolution

Responses from the UniFi API contain opaque ID references (e.g. network_id, usergroup_id, networkconf_id). By default, the server resolves these to human-readable names by looking up the referenced resource and injecting a sibling _name field:

{
  "src_networkconf_id": "609fbf24e3ae433962e000de",
  "src_networkconf_name": "IOT"
}

Resolution uses a per-request cache, so listing 100 firewall rules that reference networks only makes one additional ListNetwork API call. Typical overhead is 10-40ms depending on how many distinct resource types are referenced.

To disable resolution for a specific call, pass "resolve": false in the tool arguments.

Query Parameters

All list operations support optional post-processing parameters for filtering and projecting results.

filter — Match items by field values. Supports three operators:

// Exact match
{"filter": {"type": "usw"}}

// Substring match (case-insensitive)
{"filter": {"name": {"contains": "office"}}}

// Regular expression (RE2 syntax: https://github.com/google/re2/wiki/Syntax)
{"filter": {"name": {"regex": "^ap-.*"}}}

// Multiple conditions (ANDed together)
{"filter": {"type": "uap", "name": {"contains": "echo"}}}

search — Case-insensitive full-text search across all string field values:

{ "search": "living room" }

fields — Project the response to include only specific keys:

{ "fields": ["name", "ip", "mac"] }

Parameters can be combined. Execution order is filter → search → fields, so you can filter on fields that are excluded from the output:

{
  "filter": { "type": "uap" },
  "search": "echo",
  "fields": ["name", "ip"]
}

Development

Prerequisites

• Nix with flakes enabled
• direnv (optional but recommended)

Developing

# Clone the repository
git clone https://github.com/claytono/go-unifi-mcp.git
cd go-unifi-mcp

# Enter the development environment
nix develop
# Or with direnv:
direnv allow

# Install pre-commit hooks
pre-commit install

# Run linters
task lint

# Run tests
task test

# Run tests with coverage
task coverage

Available Tasks

task lint        # Run linters via pre-commit
task test        # Run tests
task coverage    # Run tests with coverage checks
task build       # Build the binary
task generate    # Run go generate

Testing with mcp-cli

The development environment includes mcp-cli for interactive testing of the MCP server.

1. Create .envrc.local with your UniFi credentials (not tracked in git):

   export UNIFI_HOST="https://your-controller:443"
   export UNIFI_API_KEY="your-api-key"
   # Or use username/password:
   # export UNIFI_USERNAME="admin"
   # export UNIFI_PASSWORD="password"

1. Build the binary:

   task build

1. Test with mcp-cli:

The .mcp_servers.json config provides two server entries:

• go-unifi-mcp - eager mode (252 tools)
• go-unifi-mcp-lazy - lazy mode (3 meta-tools)

Eager mode (direct tool access):

   # List tools (shows all 252)
   mcp-cli info go-unifi-mcp

   # Call a tool directly
   mcp-cli call go-unifi-mcp list_device '{}'
   mcp-cli call go-unifi-mcp list_network '{"site": "default"}'

Lazy mode (meta-tools):

   # List tools (shows only 3 meta-tools)
   mcp-cli info go-unifi-mcp-lazy

   # Query the tool index
   mcp-cli call go-unifi-mcp-lazy tool_index '{}'
   mcp-cli call go-unifi-mcp-lazy tool_index '{"category": "list"}'
   mcp-cli call go-unifi-mcp-lazy tool_index '{"resource": "network"}'

   # Execute a tool via the dispatcher
   mcp-cli call go-unifi-mcp-lazy execute '{"tool": "list_device", "arguments": {}}'

   # Batch execute multiple tools
   mcp-cli call go-unifi-mcp-lazy batch '{"calls": [{"tool": "list_network", "arguments": {}}, {"tool": "list_device", "arguments": {}}]}'

Credits

This project builds upon:

• go-unifi - Go client library for UniFi

Network Controller

• unifi-network-mcp - Python

MCP server for UniFi that inspired this project

• mcp-go - Go SDK for Model Context

Protocol

License

MPL-2.0