Send Template Messages to WhatsApp via Webhook
Your app detects a payment failure. Instead of email, a webhook fires to Notis, which sends a pre-approved WhatsApp template: 'Payment Failed. Order: #12345. Action: Retry or update card.' Customer gets it on WhatsApp where they're already checking. Higher engagement, faster action.
Trigger
Webhook received
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Action
Send template message
Send a template message to a whatsapp number.
Why this helps
Critical notifications go out via email or Slack, but engagement is low. WhatsApp template messages have higher read and response rates, but setting them up feels complex.
- Send notifications via WhatsApp template for higher engagement
- Trigger from any external system via a simple webhook
- Use pre-approved templates to ensure compliance and professionalism
Setup
Build it in a few focused steps.
- 1Connect WhatsApp to Notis and pre-approve a message template (e.g., 'Payment Failed. Order: {{order_id}}. Action: {{action}}').
- 2Create an automation: 'When a webhook arrives with template data, send the WhatsApp template message with the provided variables.'
- 3Select 'Notis Webhook' as your trigger type.
- 4Notis gives you a webhook URL and template structure. Add that to your app or monitoring tool.
- 5Test by sending a sample webhook and verifying the template message arrives.
Questions about this workflow
How do I get a WhatsApp template approved?
WhatsApp requires pre-approval for most messaging outside the 24-hour window. Notis handles the submission process; you just describe what you want to send.
What variables can I pass through the webhook?
Whatever your system has: order ID, customer name, error message, next steps. Notis interpolates them into the template message.
How do I handle sensitive data in templates?
Template messages are for public info (order confirmations, alerts). For sensitive data, use direct messages instead. Notis can route based on data type.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Linear to Whatsapp. A trigger fires from one place; an action lands in another.
Linear triggers
Whatsapp actions
Comment Received Trigger
Triggered when a comment is received.
Create message template
Create a new message template for the whatsapp business account. templates must be approved by whatsapp before they can be used. templates are required for marketing messages and messages sent outside the 24-hour window.
Issue Created Trigger
Triggered when a new issue is created.
Delete message template
Delete a message template from the whatsapp business account. this permanently removes the template and it cannot be recovered. only delete templates that are no longer needed.
Issue Updated Trigger
Triggered when an issue is updated. For example labels are changed, issue status is changed, etc.
Get business profile
Get the business profile information for a whatsapp business phone number. this includes business details like description, address, website, and contact info.
Private Team Comment Created
Fires when a new comment is posted on an issue in a private Linear team (polled with the connected user's token).
Get media
Get information about uploaded media including a temporary download url. the download url is valid for 5 minutes and can be used to retrieve the actual media file. this is useful for downloading media that was sent to your whatsapp number.
Private Team Issue Created
Fires when a new issue appears in a private Linear team (polled with the connected user's token).
Get media info
Get metadata about uploaded media without generating a download url. this is useful for checking file size, type, and hash without downloading the file. use get media if you need the actual download url.
Private Team Issue Properties Updated
Fires when properties on an issue change in a private Linear team (polled with the connected user's token).
Get message templates
Get all message templates for the whatsapp business account. templates are required for sending messages outside the 24-hour window and for marketing/utility messages.
Project Created
Fires when a new Linear project is created. Covers projects in both public and private teams — polls with the connected user's token, so visibility matches what the connected user can see in Linear.
Get phone number
Get details of a specific phone number associated with a whatsapp business account.
Project Properties Updated
Fires when properties on a Linear project change (status, lead, target date, priority, etc.). Covers projects in both public and private teams — polls with the connected user's token.
Get phone numbers
Get all phone numbers associated with a whatsapp business account (waba).
Connect any two apps with Notis in the middle.
Not just Linear and Whatsapp. Any combination from 985+ integrations.
When this happens · Trigger
Do this · Action
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