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Inbound message and message status webhooks

You need to configure both your Inbound Message and Message Status webhooks.

Configure your webhook URLs

There are at least two webhooks you must configure:

When messages status updates are generated, such as delivered, rejected or accepted, callbacks will be received on the Message Status webhook URL.

When an inbound message is received, a callback with message payload is invoked on the Inbound Message webhook URL.

IMPORTANT: Both webhook URLs should be configured. At the very least your webhook handlers should return 200 responses for both Inbound Message and Message Status callbacks. This ensures potential callback queuing issues are avoided.

To configure the webhook URLs

From Nexmo Dashboard go to Messages and Dispatch.

TIP: If the Webhook URLs for messages in your Nexmo Account are already in production use and you would like a second one for using the Messages API, please email and ask for a sub API Key.

Enter your Webhook URLs in the fields labeled Status URL and Inbound URL.

The values you enter for webhook URLs depends on where your webhook server is located. If your server was running on port 3000 on your webhook URLs might be:

Webhook URL
Status URL
Inbound URL

NOTE: The default method of POST should be used for both of the webhook URLs.

Inbound SMS webhooks

Messages API does not support inbound SMS message and SMS delivery receipt callbacks via the application-specific webhooks described in the previous section. In order to receive callbacks for SMS message and SMS delivery receipts you need to set the account-level webhooks for SMS.

Testing locally via Ngrok

If you want to test your application locally you can use Ngrok.

See our information on Using Ngrok for local development

If using Ngrok in this manner you would use the Ngrok URLs for your webhook URLs:

Callback queue

Please note that callbacks emanating from Nexmo, such as those on your Message Status webhook URL and Inbound Message URL, are queued by Nexmo on a per-account basis, not a per-application basis.

To avoid callbacks stalling the callback queue, please ensure that all applications acknowledge callbacks with a 200 response. Further, it is advisable to cease activity on a test application 24 hours before deleting it, or removing webhook configuration, otherwise it could potentially leave callbacks in your callback queue that will not be acknowledged, and therefore result in delays on callbacks destined for your production applications.