n8n helps technical and non-technical users streamline and automate workflows. With the ClickSend integration, you can easily automate sending SMS, MMS, voice, fax, and direct mail, and even trigger actions based on inbound SMS.
Prerequisites
Before you begin:
Create an n8n account
Create a ClickSend account
New accounts come with free test credits
Locate your ClickSend API credentials
Authentication
To authenticate your ClickSend account in n8n:
In your n8n workflow, add a ClickSend node.
Select Create new credentials.
Enter your ClickSend username and API key (not your password).
Click Test Credentials — you should see a "Connection tested successfully" message.
Sending SMS with n8n
To send SMS messages from n8n:
Add a ClickSend SMS node to your workflow.
Provide the following fields:
To – Recipient’s number in international format (e.g., +61411111111)
Message – Your message content (max 1,224 characters)
Sender Number – Use a TFN, 10DLC, alpha tag, or a validated own number
(Optional) Custom String – Add a reference for reporting
(Optional) Schedule – Set a specific time to send your message
Sending MMS with n8n
To send MMS messages:
Add a ClickSend MMS node to your workflow.
Fill out these required fields:
To – Recipient’s international number
Message – Up to 1,500 characters
Image URL – A public .jpeg URL (one image only)
Subject – Required; up to 20 characters
Sender Name – Must be TFN, 10DLC, or shared number (alpha tags are not supported)
Troubleshooting
If things aren't working as expected:
Check credentials: Use your ClickSend username and API key.
Check account credit: [Top up here]
Phone number format: Use international format (e.g., +1, +44)
Required fields:
SMS: Recipient number + message
MMS: Recipient number + message + image URL + subject
Alpha tag issues?
Max 11 characters, no spaces
Check alpha tag support by country
Some countries may require global sending to be enabled (contact support)
FAQs
Can I send from an alpha tag?
Yes — make sure it's 11 characters max, no spaces. Not supported in all countries.
Can I receive inbound SMS using alpha tags?
No. Inbound is only supported on shared numbers, dedicated numbers, TFNs, and 10DLCs.
How do I set an alpha tag as sender?
Enter your business name (11 characters or fewer) in the Sender Number field.
Other ClickSend Features in n8n
In addition to SMS and MMS, ClickSend's n8n integration supports:
Send Fax
Send Voice
Send Postcard
Send Letter / Direct Mail
Inbound SMS Trigger
Trigger actions in n8n when an inbound SMS is received on your TFN or 10DLC.