PostHog MCP for Codex

The PostHog MCP server enables Codex to directly interact with your PostHog data – managing feature flags, querying analytics, investigating errors, and more.

Server URL

https://mcp.posthog.com/mcp

The PostHog authentication server automatically routes you to the correct data region (US or EU) based on the account you log in with.

Quick install

The PostHog Wizard can install the MCP server directly into Codex:

npx @posthog/wizard mcp add

Codex plugin

You can also install PostHog as a Codex plugin:

codex plugin marketplace add PostHog/ai-plugin

After adding the plugin, run codex in your terminal and select PostHog from the /plugins menu to install and enable.

codex
# Then run /plugins, select PostHog, and install

Manual MCP setup

Run the following command in your shell. Codex supports native OAuth, so you'll be prompted to log in to PostHog when you first use the MCP.

codex mcp add posthog --url https://mcp.posthog.com/mcp

Be mindful of prompt injection – LLMs can be tricked into following untrusted commands, so always review tool calls before executing them.

What's next

• Use cases – 20+ example prompts and multi-step recipes for the most useful MCP workflows
• Tools reference – every tool the MCP server exposes, grouped by category
• FAQ and advanced setup – auth, scoping, filtering, safety, and other operational details