PostHog MCP Server

Liquidium MCP Server

A Model Context Protocol (MCP) server for interacting with PostHog analytics through Liquidium. Create annotations and manage projects directly through Claude Desktop or Smithery!

Features

• List Projects: View all available PostHog projects in your organization
• Create Annotations: Add annotations to your PostHog projects with optional timestamps
• List and Search Insights: View and search for insights in your PostHog projects
• Get Insight Details: View detailed information about specific insights

Setup

Option 1: Smithery (Recommended)

The easiest way to use Liquidium MCP is through Smithery:

1. Visit Liquidium MCP on Smithery
2. Click "Add to Claude"
3. Enter your PostHog API Key when prompted
4. Start using Liquidium tools in Claude!

Option 2: Local Installation

1. Prerequisites
   • Python 3.10 or higher
   • pip or uv package manager
   • PostHog API Key with annotation:write and project:read scopes obtained from your project settings
2. Installation
   # clone the repo git clone https://github.com/Shudufhadzo/liquidium-mcp.git cd liquidium-mcp # Create and activate virtual environment python -m venv .venv # On Windows .venv\Scripts\activate # On macOS/Linux source .venv/bin/activate # Install dependencies pip install -e .
3. Configuration
   • Create a .env file in the project root:
     PERSONAL_API_KEY=phx_your_posthog_api_key_here
4. Claude Desktop Setup
   • Install Claude Desktop
   • Open Claude Desktop settings and click "Edit Config". Alternatively, you can open the file from:
     • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
     • Windows: %APPDATA%\Claude\claude_desktop_config.json
   • Add this to your claude_desktop_config.json (adjust paths according to your system):
     { "mcpServers": { "posthog": { "command": "/path/to/python", # Get this by running: which python "args": [ "-m", "posthog_mcp", "--directory", "/path/to/your/posthog-mcp" # Full path to this project ] } } }
     Check the latest documentation on setting up Claude Desktop as MCP client if you ran into any issues.

Usage

After setup, you'll see a hammer icon in Claude Desktop. The following commands are available:

List Projects

Ask Claude:

Get and Search for Insights

Ask Claude:

"List my PostHog insights" or "Search for revenue insights in my PostHog"

Search for documentations online

You can ask:

• "how can i do reverse proxy in nextjs in posthog?"

Create Annotation

Using the Project ID you get from the list of projects, ask Claude:

or with a specific date:

Troubleshooting

• If the hammer icon doesn't appear, restart Claude Desktop
• Check logs at ~/Library/Logs/Claude/mcp*.log (macOS) or %APPDATA%\Claude\logs (Windows)
• Verify your PostHog API key has the correct permissions
• Make sure all paths in claude_desktop_config.json are absolute paths

Contributing

Feel free to open issues and PRs! We follow PostHog's contribution guidelines.