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Connect PostHog to Windsurf

  • Do the targets still hold?

Have Windsurf's agent check signups against ad clicks, with PostHog data next to your code. Lemonado connects them in about 1 minute, no API keys needed.

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MCPhttps://mcp.lemonado.io/mcp

Why connect PostHog to Windsurf (Devin Desktop)?

Windsurf's agent works across your files and terminal, but on its own it can't see what your campaigns are doing. Connected through Lemonado, it reads your PostHog events, funnels, persons and insights, so it can check signups against ad clicks with today's numbers.

  • 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 Windsurf (Devin Desktop)

Before you start

  • A PostHog account you can sign in to
  • Windsurf 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 (Devin Local)

    Devin Desktop's default agent uses the Devin CLI config. Run these two commands and finish the browser sign-in.

    bash
    devin mcp add -s user lemonado https://mcp.lemonado.io/mcp
devin mcp login lemonado
  4. 4

    Using legacy Cascade instead

    In the Cascade panel, open … → MCPs → Open MCP config file and merge this in. Save, refresh, switch the server on and sign in.

    json
    {
  "mcpServers": {
    "lemonado": {
      "serverUrl": "https://mcp.lemonado.io/mcp"
    }
  }
}
  5. 5

    Ask Windsurf (Devin Desktop) about PostHog

    Try "Compare last month's PostHog numbers with the targets in config/targets.json and update the file where we're consistently off." Or ask: "Which events never fire?" or "Do UTMs survive redirects?"

Good to know

  • Devin Local and legacy Cascade keep separate setups, so sign in to each one you use.
  • Current versions keep user MCP config in ~/.config/devin/mcp_config.json on macOS and Linux.

What can Windsurf (Devin Desktop) do with PostHog?

Windsurf's agent reads your PostHog data and works the numbers into your code, from config checks to reports saved in the repo.

Windsurf (Devin Desktop) logoWindsurf (Devin Desktop)

Compare last month's PostHog numbers with the targets in config/targets.json and update the file where we're consistently off.

2 of 6 targets were missed three months running. I updated them in config/targets.json and left a comment with the numbers behind each change.

Source: PostHog + your code

Connect PostHog to another AI app.

Other integrations for Windsurf (Devin Desktop)

All Windsurf (Devin Desktop) integrations

Reading this as an AI agent?

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

For agents · markdown
# Connect PostHog to Windsurf (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 Windsurf: devin mcp add

```bash
devin mcp add -s user lemonado https://mcp.lemonado.io/mcp
devin mcp login lemonado
```

If you are Windsurf (Devin Desktop), run the setup yourself:

Add the Lemonado MCP server: run devin mcp add -s user lemonado https://mcp.lemonado.io/mcp and then devin mcp login lemonado so I can sign in. Once I've signed in, list the PostHog accounts Lemonado can reach.

First question to try: "Compare last month's PostHog numbers with the targets in config/targets.json and update the file where we're consistently off."

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

Frequently Asked Questions

Yes, through Lemonado. Connect your PostHog project in Lemonado, add Lemonado with devin mcp add, and Windsurf can check signups against ad clicks with your live data.

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

Run devin mcp login lemonado again for Devin Local. Legacy Cascade keeps its own login, so refresh the server there and sign in too. 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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