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Built-in nodes Credentials library

MQTT credentials

Documentation for MQTT credentials. Use these credentials to authenticate MQTT in n8n, a workflow automation platform.

MQTT credentials

You can use these credentials to authenticate the following nodes:

MQTT
MQTT Trigger

Prerequisites

Install an MQTT broker.

MQTT provides a list of Servers/Brokers at MQTT Software.

Supported authentication methods

Broker connection

Related resources

Refer to MQTT's documentation for more information about the MQTT protocol.

Refer to your broker provider's documentation for more detailed configuration and details.

Using broker connection

To configure this credential, you'll need:

Your MQTT broker's Protocol
The Host
The Port
A Username and Password to authenticate with
If you're using SSL, the relevant certificates and keys

To set things up:

Select the broker's Protocol, which determines the URL n8n uses. Options include:
- Mqtt: Begin the URL with the standard mqtt: protocol.
- Mqtts: Begin the URL with the secure mqtts: protocol.
- Ws: Begin the URL with the WebSocket ws: protocol.
Enter your broker Host.
Enter the Port number n8n should use to connect to the broker host.
Enter the Username to log into the broker as.
Enter that user's Password.
If you want to receive QoS 1 and 2 messages while offline, turn off the Clean Session toggle.
Enter a Client ID you'd like the credential to use. If you leave this blank, n8n will generate one for you. You can use a fixed or expression-based Client ID.
- Client IDs can be useful to identify and track connection access. n8n recommends using something with n8n in it for easier auditing.
If your MQTT broker uses SSL, turn the SSL toggle on. Once you turn it on:
1. Select whether to use Passwordless connection with certificates, which is like the SASL mechanism EXTERNAL. If turned on:
  1. Select whether to Reject Unauthorized Certificate: If turned off, n8n will connect even if the certificate validation fails.
  2. Add an SSL Client Certificate.
  3. Add an SSL Client Key for the Client Certificate.
2. One or more SSL CA Certificates.

Refer to your MQTT broker provider's documentation for more detailed configuration instructions.

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Motorhead credentials

Documentation for the Motorhead credentials. Use these credentials to authenticate Motorhead in n8n, a workflow automation platform.

MSG91 credentials

Documentation for MSG91 credentials. Use these credentials to authenticate MSG91 in n8n, a workflow automation platform.

On this page

MQTT credentials

Supported authentication methods

Related resources

Using broker connection

MQTT credentials