Stop Paying for Slack Alerts: Send Sentry Errors to Slack for Free

Tired of paying for Sentry’s Slack integration? Good news: you don’t have to. With a simple setup using Sentry webhooks, Vercel Edge Functions, and Slack’s free API, you can receive real-time error notifications in Slack—without paying for a premium plan. Here’s how to set it up. Why Pay for What You Can Build? Sentry’s built-in Slack integration sits behind a paywall. For indie developers and small projects, that cost often isn’t justified. Instead, you can: Use Sentry’s webhook integration Catch events with a Vercel Edge Function Send formatted messages using Slack’s free chat.postMessage API Same result. Zero extra cost. Step 1: Set Up the Sentry Webhook Sentry provides a legacy webhook integration that sends event data to any external endpoint. Open your Sentry project settings Go to Legacy Integrations → Webhooks Add a new webhook (You'll paste your Vercel function URL here after deployment) That’s it. Sentry will now send error events to your custom endpoint. Step 2: Create the V