Quick Guide to Implementing Webhooks in Keap

Hey there, fellow JavaScript dev! Ready to supercharge your Keap integration with webhooks? Let's dive right in and get those real-time updates flowing.

What's the Deal with Webhooks?

Webhooks are like your app's personal news feed from Keap. Instead of constantly asking "Any updates?", Keap will ping your app whenever something interesting happens. Cool, right?

Before We Start Coding

Make sure you've got:

• Your Keap API credentials (you're not going far without these!)
• A comfy Node.js environment
• A basic grasp of Express.js (we'll use it for our webhook endpoint)

Setting Up Your Webhook Receiver

First things first, let's create a simple Express server to catch those incoming webhooks:

const express = require('express');
const crypto = require('crypto');
const app = express();

app.use(express.json());

app.post('/webhook', (req, res) => {
  const signature = req.headers['x-keap-signature'];
  // We'll verify this signature in a bit
  
  console.log('Webhook received:', req.body);
  res.sendStatus(200);
});

app.listen(3000, () => console.log('Webhook server running on port 3000'));

Don't forget to verify that signature! It's like checking ID at the door:

const isValidSignature = (payload, signature, secret) => {
  const hmac = crypto.createHmac('sha256', secret);
  const digest = hmac.update(JSON.stringify(payload)).digest('hex');
  return signature === digest;
};

Registering Your Webhook with Keap

Time to tell Keap where to send those juicy updates. We'll use axios for this:

const axios = require('axios');

const createWebhook = async () => {
  try {
    const response = await axios.post('https://api.infusionsoft.com/crm/rest/v1/hooks', {
      eventKey: 'contact.add',
      hookUrl: 'https://your-app.com/webhook',
      status: 'active'
    }, {
      headers: { 'Authorization': 'Bearer YOUR_ACCESS_TOKEN' }
    });
    console.log('Webhook created:', response.data);
  } catch (error) {
    console.error('Error creating webhook:', error.response.data);
  }
};

createWebhook();

Handling Those Sweet, Sweet Events

When a webhook hits your endpoint, it's party time:

app.post('/webhook', (req, res) => {
  const { event_type, data } = req.body;
  
  switch(event_type) {
    case 'contact.add':
      console.log('New contact added:', data);
      // Do something awesome with the new contact
      break;
    // Handle other event types
    default:
      console.log('Unhandled event type:', event_type);
  }
  
  res.sendStatus(200);
});

When Things Go Wrong (Because They Will)

Webhooks can fail. It's a fact of life. But we're prepared:

const MAX_RETRIES = 3;
const RETRY_DELAY = 5000; // 5 seconds

const processWebhook = async (data, attempt = 1) => {
  try {
    // Process the webhook data
  } catch (error) {
    if (attempt <= MAX_RETRIES) {
      console.log(`Retry attempt ${attempt} in ${RETRY_DELAY}ms`);
      setTimeout(() => processWebhook(data, attempt + 1), RETRY_DELAY);
    } else {
      console.error('Max retries reached. Webhook processing failed.');
    }
  }
};

Taking It for a Spin

Keap's got your back with some nifty testing tools. But you can also whip up a quick local test:

const testWebhook = {
  event_type: 'contact.add',
  data: { id: 123, email: '[email protected]' }
};

axios.post('http://localhost:3000/webhook', testWebhook)
  .then(response => console.log('Test webhook sent'))
  .catch(error => console.error('Error sending test webhook:', error));

Keeping It Secure

Remember:

• Always use HTTPS in production. No exceptions!
• If Keap offers IP whitelisting, use it. It's like a VIP list for your webhook endpoint.

Scaling to the Moon

As your app grows, you might need to level up:

• Process webhooks asynchronously to keep your server snappy.
• For high volume, consider a message queue like RabbitMQ or AWS SQS.

You're a Webhook Wizard, Harry!

And there you have it! You're now armed and ready to implement webhooks in your Keap integration. Remember, the key is to start simple and iterate. Before you know it, you'll be handling webhooks like a pro.

Want to see all this in action? Check out our GitHub repo for a complete working example.

Now go forth and webhook all the things! 🚀