PostHog Common Errors

Overview

Quick reference for the top 10 most common PostHog errors and their solutions.

Prerequisites

• PostHog SDK installed

• API credentials configured

• Access to error logs

Instructions

Step 1: Identify the Error

Check error message and code in your logs or console.

Step 2: Find Matching Error Below

Match your error to one of the documented cases.

Step 3: Apply Solution

Follow the solution steps for your specific error.

Output

• Identified error cause

• Applied fix

• Verified resolution

Error Handling

Authentication Failed

Error Message:

Authentication error: Invalid API key

Cause: API key is missing, expired, or invalid.

Solution:

Verify API key is set

echo $POSTHOG_API_KEY

Rate Limit Exceeded

Error Message:

Rate limit exceeded. Please retry after X seconds.

Cause: Too many requests in a short period.

Solution: Implement exponential backoff. See posthog-rate-limits skill.

Network Timeout

Error Message:

Request timeout after 30000ms

Cause: Network connectivity or server latency issues.

Solution:

// Increase timeout const client = new Client({ timeout: 60000 }); # 60000: 1 minute in ms

Examples

Quick Diagnostic Commands

set -euo pipefail

Check PostHog status

curl -s https://status.posthog.com

Verify API connectivity

curl -I https://api.posthog.com

Check local configuration

env | grep POSTHOG

Escalation Path

• Collect evidence with posthog-debug-bundle

• Check PostHog status page

• Contact support with request ID

Resources

• PostHog Status Page

• PostHog Support

• PostHog Error Codes

Next Steps

For comprehensive debugging, see posthog-debug-bundle .