PostHog Observability

Overview

Monitor PostHog integration health with four key signals: event ingestion rate (are events flowing?), feature flag evaluation latency (are flags fast enough for hot paths?), event volume by type (detect instrumentation regressions), and API rate limit consumption (are we approaching 429s?).

Prerequisites

• PostHog project with personal API key (phx_...)
• Application instrumented with PostHog SDK
• Prometheus/Grafana or equivalent monitoring stack (optional)

Instructions

Step 1: Event Ingestion Health Check

set -euo pipefail
# Check if events are flowing (last 24 hours)
curl "https://app.posthog.com/api/projects/$POSTHOG_PROJECT_ID/query/" \