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Connect PostHog to ChatGPT

  • What happened this week?

Ask ChatGPT how signups and activation moved in PostHog this week, with the campaigns that brought them. Lemonado connects them in about 3 minutes, no API keys needed.

Try free with $150 in creditsAdd to ChatGPT
MCPhttps://mcp.lemonado.io/mcp

Why connect PostHog to ChatGPT?

Most PostHog numbers reach ChatGPT as a screenshot or a CSV. Pick Lemonado with @ and ChatGPT queries the events, funnels and web analytics itself, then adds what each source cost in ads.

  • All your PostHog data

    Events, pageviews and their properties, ready to ask about.

  • Always today's numbers

    Persons with UTM and referrer properties, synced from PostHog automatically, so answers use today's numbers.

  • Connect all your tools

    Questions like "What does an activated user cost?" use PostHog and Mixpanel, GA4 at once.

How to connect PostHog to ChatGPT

Add to ChatGPT

Before you start

  • A PostHog account you can sign in to
  • A ChatGPT account
  • A Lemonado account (the free trial works)
  1. 1

    Connect PostHog in Lemonado

    In Lemonado, open Connectors, find PostHog and sign in. Sign in to PostHog and pick the project. Choose the EU region if your PostHog lives there.

  2. 2

    Turn on external access

    In the company's settings, open External tools, turn the connection on, choose which sources it can reach and copy the server URL.

    text
    https://mcp.lemonado.io/mcp
  3. 3

    Open ChatGPT plugins

    Go to chatgpt.com/plugins. Select + and choose Add custom MCP server.

  4. 4

    Add Lemonado

    Name it Lemonado, add a short description, and paste the server URL under Connection. Set authentication to OAuth.

    text
    https://mcp.lemonado.io/mcp
  5. 5

    Create the plugin

    Review the acknowledgement and select Create as a plugin. Check the tools ChatGPT discovers, then install it.

  6. 6

    Ask ChatGPT about PostHog

    Start a new chat, type @ and pick Lemonado. Sign in to Lemonado when ChatGPT asks. Try "@Lemonado Recap this week in PostHog for the team channel: traffic, signups, activation rate and which sources drove them." Or ask: "Why did signups drop?" or "Which campaign landed best?"

Good to know

  • Your ChatGPT account and workspace settings decide whether you can add custom MCP servers. Workspace admins can turn it off.
  • Older guides point to Settings → Apps → Developer mode. OpenAI has replaced that flow with Plugins.

What can ChatGPT do with PostHog?

ChatGPT reads your PostHog numbers when you pick @Lemonado, and writes the update, the summary or the next step for you.

ChatGPT logoChatGPT

@Lemonado Recap this week in PostHog for the team channel: traffic, signups, activation rate and which sources drove them.

Here it is: 18,200 visitors, 640 signups (+11%), 31% activated. Organic search brought the most activated users; paid social brought the most signups.

Source: PostHog

Connect PostHog to another AI app.

Other integrations for ChatGPT

All ChatGPT integrations

Reading this as an AI agent?

Everything an agent needs to set this up, in plain text. Paste this page's link into ChatGPT and ask it to connect you, or copy the block.

For agents · markdown
# Connect PostHog to ChatGPT (Lemonado MCP)

- Server URL: https://mcp.lemonado.io/mcp
- Transport: Streamable HTTP
- Auth: OAuth; the user signs in to Lemonado in the browser. No API keys.
- In Lemonado: connect the PostHog project. Sign in to PostHog and pick the project. Choose the EU region if your PostHog lives there.
- In ChatGPT: Plugins → + → Add custom MCP server

```text
https://mcp.lemonado.io/mcp
```

One-click install: https://chatgpt.com/plugins/plugin_asdk_app_69455664de448191bc42a9f6584d34e5

First question to try: "@Lemonado Recap this week in PostHog for the team channel: traffic, signups, activation rate and which sources drove them."

More: https://lemonado.io/integrations/posthog · https://lemonado.io/llms.txt
FAQ

Frequently Asked Questions

Yes, two ways. PostHog's own hosted server can be added through ChatGPT's developer mode for questions that stay inside PostHog. Lemonado, installed as a plugin, answers the ones that also need ad spend or revenue.

Yes. PostHog's official MCP server is hosted, so ChatGPT can use it too. It covers PostHog only. Lemonado covers PostHog plus your ad platforms, GA4 and the rest of your stack in one connection, so ChatGPT can answer questions across them.

Check that Lemonado is installed at chatgpt.com/plugins, then pick it with @ in a new chat. Workspace admins can turn custom plugins off. In Lemonado, check that PostHog is connected and External tools is on for the company. If sources are missing, check that your site keeps UTM parameters through redirects. PostHog can only record the source it sees on the first page.

Yes, if both are connected in Lemonado. One connection reaches every source you allow, so you can ask things like "Compare Google Ads clicks by campaign last week with PostHog sessions carrying the same utm_campaign."

MCP is included in Lemonado's paid plans and in the free trial, so you can try it before you pay.

See plans and pricing

Still have a question?

Shoot us an email at hello@lemonado.io.

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