Liquidium MCP Backend Service

A Model Context Protocol (MCP) implementation specifically engineered to interface with the PostHog analytics platform, utilizing the Liquidium intermediary layer. Allows for direct management of markers and project exploration through integrated environments like Claude Desktop or Smithery.

Core Capabilities

• Project Inventory Retrieval: Obtain a comprehensive catalog of all PostHog organizational projects.
• Annotation Deployment: Introduce time-stamped event markers ('annotations') onto selected PostHog datasets.
• Metric Examination and Filtering: Browse and execute targeted searches across existing analytical insights.
• Granular Insight Fetching: Access complete data payloads and metadata for specific, identified insights.

Deployment Procedures

Path 1: Smithery Integration (Recommended Method)

Leveraging Liquidium MCP via Smithery streamlines setup:

1. Navigate to the Liquidium MCP Service on Smithery.
2. Execute the action labeled "Incorporate into Claude."
3. Input your required PostHog Application Programming Interface (API) credential when prompted.
4. The Liquidium capabilities are now accessible within your Claude session.

Path 2: Local System Deployment

1. Prerequisites Check

2. Execution environment requires Python version 3.10 or superior.

3. Must possess a functional package manager (pip or uv).

4. A PostHog API key is mandatory, provisioned with scopes for annotation:write and project:read. Obtainable from your project configuration panel.

5. Installation Sequence

```bash # Repository duplication git clone https://github.com/Shudufhadzo/liquidium-mcp.git

cd liquidium-mcp

# Virtual environment provisioning and activation python -m venv .venv

# Windows activation command .venv\Scripts\activate

# Unix-like systems activation command source .venv/bin/activate

# Install required packages in editable mode pip install -e . ```

1. Configuration File Setup

2. Establish a .env file within the project's root directory: PERSONAL_API_KEY=phx_your_posthog_api_key_here

3. Client Integration (Claude Desktop)

4. Ensure Claude Desktop application is installed.
5. Access the Desktop settings interface and select "Modify Configuration." Alternatively, open the configuration file directly:
   • macOS path: ~/Library/Application Support/Claude/claude_desktop_config.json
   • Windows path: %APPDATA%\Claude\claude_desktop_config.json
6. Augment your claude_desktop_config.json with the following block (adjusting file system paths as necessary for your specific installation): json { "mcpServers": { "posthog": { "command": "/path/to/python", # Determine via: which python "args": [ "-m", "posthog_mcp", "--directory", "/path/to/your/posthog-mcp" # Absolute path to the project directory ] } } } Refer to the official MCP documentation for the most current Claude Desktop configuration instructions if errors persist.

Operational Use Cases

Once configuration is finalized, a wrench icon will manifest in the Claude Desktop interface. Accessible functions include:

Retrieving Project Index

Prompt Claude with:

"Generate a list of my accessible PostHog data repositories"

Insight Querying and Enumeration

Utilize prompts such as: "Show all PostHog metrics available" or "Locate insights related to conversion rate fluctuations within PostHog."

External Knowledge Search

Capability to query external documentation related to PostHog integration:

• "Detail the procedure for setting up a reverse proxy configuration in Next.js specifically involving PostHog data streams."

Marker Generation

Employ the Project Identifier obtained from the inventory listing to place new markers:

"Post a marker onto PostHog project 53497 labeled 'Release Candidate Build 1.2.3'"

Or specify a temporal context:

"Inject a marker into project 53497, dated for the twentieth of March, stating 'Initiated Q2 Marketing Push'"

Troubleshooting Guide

• If the utility icon fails to appear, execute a restart of the Claude Desktop client.
• Examine diagnostic records located at ~/Library/Logs/Claude/mcp*.log (macOS) or %APPDATA%\Claude\logs (Windows).
• Confirm that the supplied PostHog API key possesses the requisite operational permissions.
• Validate that all file paths specified within claude_desktop_config.json are absolute references.

Collaboration

We welcome reports, feature requests, and pull requests! Our development standards align with PostHog's established contribution protocols.

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