Public Servers

RobustMQ provides public test servers for both MQTT and mq9 — use them directly for testing and development without any local deployment.

MQTT Public Server

Server Information

Endpoints

Protocol	Address	Port	Description
MQTT TCP	117.72.92.117	1883	Standard MQTT connection
MQTT SSL/TLS	117.72.92.117	1885	Encrypted MQTT connection
MQTT WebSocket	117.72.92.117	8083	WebSocket connection
MQTT WebSocket SSL	117.72.92.117	8085	Encrypted WebSocket connection
MQTT QUIC	117.72.92.117	9083	QUIC protocol connection

Authentication

• Username: admin
• Password: robustmq

Management Interface

• Dashboard: http://demo.robustmq.com/

Quick Experience

📦 MQTTX Installation: If you haven't installed MQTTX CLI yet, please refer to our MQTTX Installation Guide for detailed installation instructions on different platforms.

Web UI ：https://mqttx.app/web-client#/recent_connections

Using MQTTX Command Line Tool

1. Send Messages

# Send simple message
mqttx pub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "test/topic" -m "Hello RobustMQ!"

# Send QoS 1 message
mqttx pub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "test/qos1" -m "QoS 1 message" -q 1

# Send retained message
mqttx pub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "test/retained" -m "Retained message" -r

# Send JSON format message
mqttx pub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "sensors/temperature" -m '{"value": 25.5, "unit": "celsius"}'

2. Subscribe to Messages

# Subscribe to single topic
mqttx sub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "test/topic"

# Subscribe to wildcard topics
mqttx sub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "test/+"  # Single-level wildcard
mqttx sub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "test/#"  # Multi-level wildcard

# Subscribe and display detailed information
mqttx sub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "test/topic" --verbose

3. Performance Testing

# Publish performance test
mqttx bench pub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "test/bench" -c 10 -C 100

# Subscribe performance test
mqttx bench sub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "test/bench" -c 50

Using MQTTX GUI Client

1. Connection Configuration

• Host: 117.72.92.117
• Port: 1883
• Username: admin
• Password: robustmq
• Client ID: Custom

2. Publish and Subscribe

After connecting successfully, you can:

• Create subscriptions to receive messages
• Publish messages to specified topics
• View real-time message flow

Complete Example

Step 1: Subscribe

# Terminal 1: Subscribe to temperature sensor data
mqttx sub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "sensors/temperature" --verbose

Step 2: Publish

# Terminal 2: Send temperature data
mqttx pub -h 117.72.92.117 -p 1883 -u admin -P robustmq -t "sensors/temperature" -m '{"sensor": "temp-001", "value": 23.5, "unit": "celsius", "timestamp": "2024-01-01T12:00:00Z"}'

Step 3: View Dashboard

Visit http://117.72.92.117:3000/ to view real-time connections and message statistics.

Important Notes

1. Public Server Limitations: This is a public server for testing purposes, do not use in production environments
2. Message Retention: Messages are not permanently retained, please process them promptly
3. Connection Limits: Please use reasonably to avoid excessive resource consumption
4. Security Reminder: Do not transmit sensitive information in messages

Supported Protocol Features

• ✅ MQTT 3.1.1
• ✅ MQTT 5.0
• ✅ QoS 0, 1, 2
• ✅ Retained Messages
• ✅ Will Messages
• ✅ Topic Wildcards
• ✅ SSL/TLS Encryption
• ✅ WebSocket Support
• ✅ QUIC Protocol Support

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mq9 Public Server

mq9 Endpoint

Parameter	Value
NATS address	nats://117.72.92.117:4222
Protocol	NATS (mq9 is built on top of NATS)

This is a shared environment. Anyone who knows the subject name can subscribe — do not send sensitive data.

mq9 Quick Experience

Install the NATS CLI:

# macOS
brew install nats-io/nats-tools/nats

# Other platforms: https://docs.nats.io/using-nats/nats-tools/nats_cli

Set the server address:

export NATS_URL=nats://117.72.92.117:4222

mq9 Create a Mailbox

nats req '$mq9.AI.MAILBOX.CREATE' '{"ttl":3600}'
# → {"mail_id":"m-xxxxxxxx"}

mq9 Send Messages

# Normal (default, no suffix)
nats pub '$mq9.AI.MAILBOX.MSG.{mail_id}' '{"type":"task","payload":"hello mq9"}'

# Urgent
nats pub '$mq9.AI.MAILBOX.MSG.{mail_id}.urgent' '{"type":"interrupt"}'

# Critical (highest priority)
nats pub '$mq9.AI.MAILBOX.MSG.{mail_id}.critical' '{"type":"abort"}'

mq9 Subscribe

# Subscribe to all priorities
nats sub '$mq9.AI.MAILBOX.MSG.{mail_id}.*'

# Subscribe to a single priority
nats sub '$mq9.AI.MAILBOX.MSG.{mail_id}.critical'

mq9 Public Mailbox (Task Queue)

# Create a public mailbox
nats req '$mq9.AI.MAILBOX.CREATE' '{"ttl":3600,"public":true,"name":"demo.queue"}'

# Competing consumers
nats sub '$mq9.AI.MAILBOX.MSG.demo.queue.*' --queue workers

# Send tasks
nats pub '$mq9.AI.MAILBOX.MSG.demo.queue' '{"task":"job-1"}'

mq9 Important Notes

1. Public server is for testing only — do not use in production
2. Do not transmit sensitive information in messages
3. Public mailbox names are visible to everyone — use random or non-sensitive names