Sentry

A two-way integration which works on Javascript & Python.

Once installed, it will:

Add a direct link in Sentry to the profile of the person affected in PostHog.
Send an $exception event to PostHog with a direct link to Sentry.

This way, debugging issues becomes a lot easier, and you can also correlate error data with your product metrics.

Requirements

This requires either PostHog Cloud, or a self-hosted PostHog instance running version 1.30.0 or later.

Not running 1.30.0? Find out how to update your self-hosted PostHog deployment!

You'll also need an account with Sentry.

Installation

Make sure you're using both PostHog and Sentry as JS modules. You'll need to replace 'your organization' and project-id with the organization and project-id from Sentry.

'your organization' will be in the URL when you go to your Sentry instance, like so: https://sentry.io/organizations/your-organization/projects/
project-id will be the last few digits in your Sentry DSN, such as https://adf90sdc09asfd3@9ads0fue.ingest.sentry.io/project-id

Web

import posthog from 'posthog-js'
import * as Sentry from '@sentry/browser'

posthog.init('<ph_project_api_key>')

Sentry.init({
    dsn: '<your Sentry DSN>',
    integrations: [new posthog.SentryIntegration(posthog, 'your organization', project - id)],
})

How do I install this with Python?

Terminal

pip install posthog

In your app, import the posthog library and set your api key and host before making any calls.

Python

import posthog

# Substitutes posthog.api_key which still exists but has been deprecated
posthog.project_api_key = '<ph_project_api_key>'

# Only necessary if you want to use feature flags
posthog.personal_api_key = '<ph_personal_api_key>'

# You can remove this line if you're using app.posthog.com
posthog.host = '<ph_instance_address>'

You can read more about the differences between the project and personal API keys in the dedicated API authentication section of the Docs.

Note: As a general rule of thumb, we do not recommend having API keys in plaintext. Setting it as an environment variable would be best.

You can find your keys in the 'Project Settings' page in PostHog.

To debug, you can toggle debug mode on:

Python

posthog.debug = True

And to make sure no calls happen during your tests, you can disable them, like so:

Python

if settings.TEST:
    posthog.disabled = True

Usage

Once installed you'll now have $exception events in PostHog, which have a "Sentry URL" link to take you to the exception:

From Sentry you will now be able to go directly to the affected person in PostHog and watch the session recording for when the exception happened, see what else the user has done, and find their details. Don't forget to click the little icon to the side of the URL, not the URL itself.