PostHog MCP in Claude and ChatGPT: ask your product analytics in plain language

PostHog MCP lets Claude or ChatGPT answer product analytics questions from your own PostHog data: how sign-ups trend, where users drop off in a funnel, which feature flags are on, how an experiment is doing. PostHog publishes an official MCP server, and Fezola relays it, so you approve access once on PostHog's screen and give each assistant a single connector. The facts below come from Fezola's code and from PostHog's server as of 13 November 2026: they change, so check the PostHog connector page.

What you can ask

• "How did sign-ups trend over the last 30 days?"
• "Where do users drop off in the onboarding funnel?"
• "Which feature flags are still enabled, and who owns them?"
• "Show the top errors from the last week."
• "Summarize the results of our running experiment."

PostHog's server covers trends, funnels, queries (including HogQL), dashboards, feature flags, experiments, errors and surveys. Your assistant finds the tool that fits your question, then calls it through Fezola.

How to connect it

1. In the Fezola app, open Sources, add PostHog and approve access on PostHog's own screen. No API key to copy.
2. Connect Fezola to your assistant once, at https://api.fezola.com/mcp: see how to add a custom connector to Claude. ChatGPT custom connectors are available on Business, Enterprise and Edu plans.
3. Ask a question about your product.

One address serves PostHog's US and EU regions: PostHog's authorization finds your account. A PostHog account gives access to its organizations and projects, and the server switches project by itself.

Guardrails

• Reading and changing. PostHog's server includes tools that create and change things, such as dashboards, flags and experiments. Your assistant should ask before it changes anything: keep approvals on.
• Third-party text is data. What PostHog returns is data and never instructions.
• Only what you tick. You can hide PostHog from an assistant: see choose which tools Claude or ChatGPT can see.
• Your plan applies. PostHog's own plan and limits apply to what your assistant queries.

Several accounts

Teams often have separate PostHog accounts for separate products or clients. In Fezola each is its own source, and one assistant works across them, as with several Google Ads accounts.

Next steps

For search traffic next to product usage, add Google Search Console. For the other tools Fezola connects, see the PostHog connector page. New to MCP? Start with what is MCP.