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Creating your API key

1

Navigate to PostHog API settings

Go to eu.posthog.com/settings/user-api-keys.
If your project is in the US, change the URL prefix to us.posthog.com.
2

Click Create key

Open the Personal API keys section and select Create personal API key.
PostHog API Keys settings page showing the Create personal API key button

PostHog API Keys settings with Create personal API key button

3

Fill in the form

  • Select Projects
  • Choose the project you want to integrate
Create personal API key form showing project selection and access tabs

Create personal API key form with project selection

4

Set access permissions

Select MCP Server from the Scopes dropdown.
PostHog Scopes dropdown with MCP Server selected

Select MCP Server from the Scopes dropdown

5

Create and copy your API key

Click Create key and paste it into the form at userjourneys.
You’re all set