Connecting Your Tools with Webhooks

Webhooks let you connect Closed to virtually any other tool. When something happens in Closed—a proposal is viewed, signed, or status changes—we can instantly notify your other systems.

What Are Webhooks?

A webhook is an automated message sent from Closed to another system when something happens. Think of it like a notification—but for your software, not your phone.

When you configure a webhook, you tell Closed: "When X happens, send a message to this URL." The receiving system can then take action based on that message.

Available Webhook Events

Closed can send webhooks for these events:

Setting Up a Webhook

1. Go to Settings → Integrations → Webhooks
2. Click "Add Webhook"
3. Enter the endpoint URL - This is where Closed will send the data
4. Select which events to send - Choose one or more events
5. Optionally add a secret - For verifying webhook authenticity
6. Save and test - Send a test event to verify it works

{
  "event": "proposal.signed",
  "timestamp": "2025-01-21T14:32:15Z",
  "data": {
    "proposal_id": "prop_abc123",
    "proposal_title": "ACME Rebrand Project",
    "client_name": "ACME Corp",
    "client_email": "[email protected]",
    "total_value": 24000,
    "currency": "GBP",
    "signed_at": "2025-01-21T14:32:15Z",
    "signer_name": "Sarah Mitchell"
  }
}

Connecting to Popular Tools

You can use webhooks with automation platforms to connect Closed to hundreds of tools:

Using Zapier

1. Create a new Zap with "Webhooks by Zapier" as the trigger
2. Select "Catch Hook" and copy the webhook URL
3. Paste that URL in Closed's webhook settings
4. Send a test event from Closed
5. Add your actions (create HubSpot contact, send Slack message, etc.)

Using Make (Integromat)

1. Create a new scenario with "Webhooks" as the trigger
2. Select "Custom webhook" and create a new webhook
3. Copy the URL and add it to Closed
4. Build your automation with any of Make's integrations

Using n8n

1. Add a Webhook node as your trigger
2. Copy the production URL from n8n
3. Configure it in Closed's webhook settings
4. Connect to any of n8n's 300+ integrations

Common Automations

Here are popular ways agencies use webhooks:

Webhook Delivery & Reliability

Closed includes features to ensure your webhooks are delivered reliably:

• Automatic retries: If delivery fails, we retry with exponential backoff
• Delivery logs: View the full history of webhook deliveries and responses
• Payload inspection: See exactly what was sent and what was returned
• Manual retry: Resend any failed webhook with one click

View webhook delivery status in Settings → Integrations → Webhooks → Delivery Logs.

Security

Webhooks can include a secret for verification:

• When you add a secret, Closed includes a signature header with each webhook
• Your receiving system can verify this signature to confirm the webhook came from Closed
• This prevents malicious actors from sending fake webhooks to your endpoint

Troubleshooting

Summary

Webhooks are the key to making Closed work with your existing tools. Start with simple automations—Slack notifications or CRM updates—and build from there. With platforms like Zapier or Make, you can connect Closed to virtually any tool without writing code.