Langfuse Webhooks & Events

Overview

Configure Langfuse webhooks to receive notifications on prompt version changes. Langfuse supports webhook events for prompt lifecycle: Created, Updated (labels/tags changed), and Deleted. Use webhooks to trigger CI/CD pipelines, sync prompts to external systems, or notify teams via Slack.

Prerequisites

• Langfuse Cloud or self-hosted instance
• HTTPS endpoint to receive webhook POST requests
• Webhook secret for HMAC signature verification

Instructions

Step 1: Create Webhook Endpoint

// app/api/webhooks/langfuse/route.ts (Next.js App Router)
import { NextRequest, NextResponse } from "next/server";
import crypto from "crypto";