PostHog's official hosted MCP server gives AI assistants access to analytics queries, SQL insights, feature flags, experiments, error tracking and CDP destinations. It is a free remote endpoint; you sign in through PostHog's auth server, which routes you to the US or EU region automatically, and a personal API key can be sent as a bearer token instead. The PostHog wizard (npx @posthog/wizard mcp add) can install it into Codex, Cursor, Claude and VS Code.
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Connect
- 1Connect it in ChatGPT
Turn on Developer mode in ChatGPT (Settings → Security and login), open Plugins, select + and paste https://mcp.posthog.com/mcp as the MCP server URL, then sign in with OAuth. Add it to a chat from the composer's tools menu.
- 2Or add it to Codex or the API
codex mcp add posthog --url https://mcp.posthog.com/mcp codex mcp login posthogThe login command opens a browser to finish OAuth.
Configs are generated from the publisher's documented endpoint. Check their docs for plan requirements and scopes. New to this? Read the step-by-step tutorial.
Things to ask
- “How many users signed up last week, broken down by referrer?”
- “Create a feature flag called new-checkout rolled out to 10% of users”
- “What are the top errors in production over the last 24 hours?”
- “Summarize the results of our pricing page experiment”