Chargebee Webhooks

Chargebee Webhooks

When to Use This Skill

• Setting up Chargebee webhook handlers
• Debugging Basic Auth verification failures
• Understanding Chargebee event types and payloads
• Processing subscription billing events

Essential Code

Chargebee uses Basic Authentication for webhook verification. Here's how to implement it:

Express.js

// Verify Chargebee webhook with Basic Auth
// NOTE: Chargebee uses Basic Auth (not HMAC signatures), so raw body access
// is not required. Use express.json() for automatic JSON parsing:
app.post('/webhooks/chargebee', express.json(), (req, res) => {
  // Extract Basic Auth credentials
  const auth = req.headers.authorization;
  if (!auth || !auth.startsWith('Basic ')) {
    return res.status(401).send('Unauthorized');
  }

  // Decode and verify credentials
  const encoded = auth.substring(6);
  const decoded = Buffer.from(encoded, 'base64').toString('utf-8');
  const [username, password] = decoded.split(':');

  const expectedUsername = process.env.CHARGEBEE_WEBHOOK_USERNAME;
  const expectedPassword = process.env.CHARGEBEE_WEBHOOK_PASSWORD;

  if (username !== expectedUsername || password !== expectedPassword) {
    return res.status(401).send('Invalid credentials');
  }

  // Access the parsed JSON directly
  const event = req.body;
  console.log(`Received ${event.event_type} event:`, event.id);

  // Handle specific event types
  switch (event.event_type) {
    case 'subscription_created':
    case 'subscription_changed':
    case 'subscription_cancelled':
      // Process subscription events
      break;
    case 'payment_succeeded':
    case 'payment_failed':
      // Process payment events
      break;
  }

  res.status(200).send('OK');
});

// Note: If you later need raw body access (e.g., for HMAC signature
// verification with other providers), use express.raw():
// app.post('/webhooks/other', express.raw({ type: 'application/json' }), (req, res) => {
//   const rawBody = req.body.toString();
//   // ... verify signature using rawBody ...
// });

Next.js (App Router)

// app/webhooks/chargebee/route.ts
import { NextRequest } from 'next/server';

export async function POST(req: NextRequest) {
  // Extract Basic Auth credentials
  const auth = req.headers.get('authorization');
  if (!auth || !auth.startsWith('Basic ')) {
    return new Response('Unauthorized', { status: 401 });
  }

  // Decode and verify credentials
  const encoded = auth.substring(6);
  const decoded = Buffer.from(encoded, 'base64').toString('utf-8');
  const [username, password] = decoded.split(':');

  const expectedUsername = process.env.CHARGEBEE_WEBHOOK_USERNAME;
  const expectedPassword = process.env.CHARGEBEE_WEBHOOK_PASSWORD;

  if (username !== expectedUsername || password !== expectedPassword) {
    return new Response('Invalid credentials', { status: 401 });
  }

  // Process the webhook
  const event = await req.json();
  console.log(`Received ${event.event_type} event:`, event.id);

  return new Response('OK', { status: 200 });
}

FastAPI

# main.py
from fastapi import FastAPI, Header, HTTPException, Depends
from typing import Optional
import base64
import os

app = FastAPI()

def verify_chargebee_auth(authorization: Optional[str] = Header(None)):
    """Verify Chargebee webhook Basic Auth"""
    if not authorization or not authorization.startswith("Basic "):
        raise HTTPException(status_code=401, detail="Unauthorized")

    # Decode credentials
    encoded = authorization[6:]
    decoded = base64.b64decode(encoded).decode('utf-8')

    # Split username:password (handle colons in password)
    if ':' not in decoded:
        raise HTTPException(status_code=401, detail="Invalid authorization format")

    colon_index = decoded.index(':')
    username = decoded[:colon_index]
    password = decoded[colon_index + 1:]

    expected_username = os.getenv("CHARGEBEE_WEBHOOK_USERNAME")
    expected_password = os.getenv("CHARGEBEE_WEBHOOK_PASSWORD")

    if username != expected_username or password != expected_password:
        raise HTTPException(status_code=401, detail="Invalid credentials")

    return True

@app.post("/webhooks/chargebee")
async def handle_chargebee_webhook(
    event: dict,
    auth_valid: bool = Depends(verify_chargebee_auth)
):
    """Handle Chargebee webhook events"""
    event_type = event.get("event_type")
    print(f"Received {event_type} event: {event.get('id')}")

    # Process event based on type
    if event_type in ["subscription_created", "subscription_changed", "subscription_cancelled"]:
        # Handle subscription events
        pass
    elif event_type in ["payment_succeeded", "payment_failed"]:
        # Handle payment events
        pass

    return {"status": "OK"}

Common Event Types

⚠️ WARNING: Verify Event Names!

The event type names below are examples and MUST be verified against the Chargebee API documentation for your specific Chargebee configuration. Event names can vary significantly between API versions and configurations.

Special attention required for:

• Payment events (shown as payment_succeeded and payment_failed below)
• Invoice events (shown as invoice_generated below)
• Any custom events specific to your Chargebee setup

Always check your Chargebee Webhook settings for the exact event names your account uses.

Environment Variables

# Chargebee webhook Basic Auth credentials
CHARGEBEE_WEBHOOK_USERNAME=your_webhook_username
CHARGEBEE_WEBHOOK_PASSWORD=your_webhook_password

Local Development

For local webhook testing, use Hookdeck CLI:

brew install hookdeck/hookdeck/hookdeck
hookdeck listen 3000 --path /webhooks/chargebee

No account required. Provides local tunnel + web UI for inspecting requests.

Reference Materials

• Overview - What Chargebee webhooks are, common event types
• Setup - Configure webhooks in Chargebee dashboard
• Verification - Basic Auth verification details and gotchas

Examples

• Express Example - Complete Express.js implementation with tests
• Next.js Example - Next.js App Router implementation with tests
• FastAPI Example - Python FastAPI implementation with tests

Recommended: webhook-handler-patterns

We recommend installing the webhook-handler-patterns skill alongside this one for handler sequence, idempotency, error handling, and retry logic. Key references (open on GitHub):

• Handler sequence — Verify first, parse second, handle idempotently third
• Idempotency — Prevent duplicate processing
• Error handling — Return codes, logging, dead letter queues
• Retry logic — Provider retry schedules, backoff patterns

Related Skills

• stripe-webhooks - Stripe payment webhook handling
• shopify-webhooks - Shopify e-commerce webhook handling
• github-webhooks - GitHub repository webhook handling
• resend-webhooks - Resend email webhook handling
• clerk-webhooks - Clerk auth webhook handling
• elevenlabs-webhooks - ElevenLabs webhook handling
• openai-webhooks - OpenAI webhook handling
• paddle-webhooks - Paddle billing webhook handling
• webhook-handler-patterns - Handler sequence, idempotency, error handling, retry logic
• hookdeck-event-gateway - Production webhook infrastructure (routing, replay, monitoring)