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Connect PostHog to Claude Code

  • Do campaign UTMs survive to signup?

Use Claude Code to check your PostHog tracking against the code, and save funnel analysis you can rerun. Lemonado connects them in about 1 minute, no API keys needed.

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MCPhttps://mcp.lemonado.io/mcp

Why connect PostHog to Claude Code?

Claude Code sees every capture() call and UTM handler in your repo. With Lemonado it also sees what PostHog received and what your ads paid for, so it can fix the tracking gap and tie it back to the campaigns it affects in one session.

  • 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 Claude Code

Before you start

  • A PostHog account you can sign in to
  • Claude Code installed
  • 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

    Add the server

    With Claude Code installed, run one of these in your terminal. Most people want the first: it adds Lemonado to every project.

    bash
    # every project (recommended)
claude mcp add --scope user --transport http lemonado https://mcp.lemonado.io/mcp

# this project only
claude mcp add --transport http lemonado https://mcp.lemonado.io/mcp
  4. 4

    Sign in

    Start Claude Code with claude and run /mcp. Choose Lemonado and finish the sign-in in your browser.

    bash
    claude
/mcp
  5. 5

    Ask Claude Code about PostHog

    Ask a question about the accounts your connection can reach. Claude Code can also write the numbers into a file or a script for you. Try "Check that utm_source and utm_campaign survive from the landing page to the signup event in our code, and how many PostHog signups last week have none." Or ask: "Which events never fire?" or "Can it report every week by itself?"

Good to know

  • The command uses Claude Code's default local scope. Use --scope user to share the server across projects.

What can Claude Code do with PostHog?

Claude Code queries your PostHog data while it works in your repo: it saves data as files, checks tracking against code and runs headless with claude -p.

Claude Code logoClaude Code

Check that utm_source and utm_campaign survive from the landing page to the signup event in our code, and how many PostHog signups last week have none.

They're lost when the signup page redirects through /auth/callback, which drops the query string. 41% of last week's signups have no utm_campaign.

Source: PostHog + your code

Connect PostHog to another AI app.

Other integrations for Claude Code

All Claude Code integrations

Reading this as an AI agent?

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

For agents · markdown
# Connect PostHog to Claude Code (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 Claude Code: Terminal: claude mcp add

```bash
# every project (recommended)
claude mcp add --scope user --transport http lemonado https://mcp.lemonado.io/mcp

# this project only
claude mcp add --transport http lemonado https://mcp.lemonado.io/mcp
```

If you are Claude Code, run the setup yourself:

Add the Lemonado MCP server for all my projects by running: claude mcp add --scope user --transport http lemonado https://mcp.lemonado.io/mcp
Then tell me to run /mcp and sign in to Lemonado. Once I've signed in, list the PostHog accounts Lemonado can reach.

First question to try: "Check that utm_source and utm_campaign survive from the landing page to the signup event in our code, and how many PostHog signups last week have none."

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

Frequently Asked Questions

Yes. Add both with claude mcp add. PostHog's server is handy for managing flags and experiments; Lemonado brings ad spend and revenue next to PostHog data. Claude Code picks the right one for each question.

Yes. PostHog's official MCP server is hosted, so Claude Code 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 Claude Code can answer questions across them.

Run claude mcp list to see whether lemonado is connected. If it needs authentication, run /mcp inside Claude Code and sign in again. 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 "Divide last month's spend on Google Ads, Meta and LinkedIn by the PostHog users each one sent who completed onboarding."

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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