Modbus | AI Builder Hub Review & Alternatives | Flaex AI

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Modbus

Safety: 55/100

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This MCP server provides a standardized interface for interacting with Modbus devices, enabling AI agents to read and write data to industrial control systems.

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Overview

This MCP server provides a standardized interface for interacting with Modbus devices, enabling AI agents to read and write data to industrial control systems.

This MCP server is relatively safe for read-only operations and data analysis. However, write operations should be performed with caution, as they can directly impact industrial processes. Proper network security measures and configuration are crucial to mitigate risks.

Performance depends on the Modbus device and network configuration. Serial connections may have lower bandwidth compared to TCP/UDP. Optimize Modbus communication parameters for best results.

Cost is primarily related to the resources used to run the MCP server and any associated network infrastructure. Modbus protocol itself is typically royalty-free.

Python18 starsMIT

Connections & Capabilities

Connects To

GitHub

Capabilities

ReadWrite

Client Compatibility

Claude Desktop

full

Cursor

untested

Windsurf

untested

VS Code (Copilot)

untested

Quickstart

Claude Desktop Config

{
   "mcpServers": {
       "Modbus MCP Server": {
           "command": "uv",
           "args": [ "--directory", "/path/to/modbus-mcp", "run", "modbus-mcp" ],
           "env": { "MODBUS_TYPE": "tcp", "MODBUS_HOST": "127.0.0.1", "MODBUS_PORT": 502 },
       }
   }
}

Environment Variables

MODBUS_TYPEMODBUS_HOSTMODBUS_PORTMODBUS_SLAVE_IDMODBUS_SERIAL_PORTMODBUS_BAUDRATEMODBUS_PARITYMODBUS_STOPBITSMODBUS_BYTESIZEMODBUS_TIMEOUT

Tools (7)

safe

read_register

Reads the value of a Modbus holding register.

Read-only operation, no side effects.

moderate

write_register

Writes a value to a Modbus holding register.

Can modify device parameters, but not destructive if used carefully.

safe

read_coils

Reads the status of Modbus coils.

Read-only operation, no side effects.

moderate

write_coil

Writes a value to a Modbus coil.

Can control digital outputs, but not destructive if used carefully.

safe

read_input_registers

Reads the values of Modbus input registers.

Read-only operation, no side effects.

safe

read_multiple_holding_registers

Reads the values of multiple Modbus holding registers.

Read-only operation, no side effects.

safe

analyze_register

Analyzes Modbus register values with a customizable prompt.

Read-only operation, no side effects.

Security

Auth Method

None

Known Risks

!Lack of authentication mechanisms exposes the Modbus device to unauthorized access if the network is compromised.
!Incorrect write operations can cause equipment malfunction or process disruption.
!Reliance on environment variables for configuration can lead to security vulnerabilities if not properly managed.
!Modbus protocol itself has inherent security limitations, such as no encryption or integrity checks.

Safety Score

moderate risk

Positive

+Supports read-only operations for data retrieval.
+Requires explicit configuration of Modbus parameters.
+No direct internet exposure without proper network setup.
+Limited scope of operations within the Modbus protocol.

Risks

-Allows write operations to Modbus registers and coils, potentially affecting industrial processes.
-No built-in authentication or access control beyond Modbus's inherent limitations.
-Incorrect configuration can lead to unintended changes in device behavior.
-Vulnerable to Modbus-specific attacks if not properly secured at the network level.

Use Cases

Industrial Automation

-Monitoring sensor data from industrial equipment.
-Controlling actuators and valves in a manufacturing process.
-Integrating Modbus devices with SCADA systems.

Building Management Systems

-Reading temperature and humidity sensors.
-Controlling lighting and HVAC systems.
-Monitoring energy consumption.

Data Analysis

-Collecting data from Modbus devices for historical analysis.
-Identifying trends and anomalies in industrial processes.
-Optimizing equipment performance based on data insights.

Predictive Maintenance

-Monitoring equipment health parameters.
-Predicting potential failures based on historical data.
-Scheduling maintenance activities to prevent downtime.

Who Is This For?

Best For

Integrating Modbus devices with AI agents.
Monitoring and controlling industrial processes.
Collecting data from Modbus devices for analysis.
Retrofitting existing Modbus systems with modern AI capabilities.

Not Ideal For

Applications requiring high security without additional security measures.
Real-time control systems with strict latency requirements.
Environments where unauthorized access is a significant concern.

Autonomy & Execution

Default ModeConfigurable

Destructive Tools

Autonomy should be carefully configured, especially when write operations are enabled. Consider implementing safety checks and validation logic to prevent unintended consequences.

StatelessYes

Retry LogicNot documented

ConcurrencySingle-threaded

Production Tip

Implement thorough testing and validation procedures before deploying to production to ensure correct operation and prevent unintended consequences.

FAQ

What Modbus modes are supported?

Modbus TCP, Modbus UDP, and Modbus Serial (RTU/ASCII) are supported, configurable via environment variables.

How do I secure the Modbus connection?

Implement network segmentation, firewalls, and VPNs to restrict access to the Modbus network. Consider using Modbus TCP with TLS encryption if supported by the devices.

What happens if a write operation fails?

The MCP server will likely return an error message. Implement error handling in your AI agent to handle such cases gracefully.

Can I use this MCP server with multiple Modbus devices?

Yes, but you'll need to configure separate instances of the MCP server for each device or implement a multiplexing mechanism.

How do I monitor the performance of the Modbus connection?

Implement logging and monitoring to track response times, error rates, and other relevant metrics.

What are the limitations of the Modbus protocol?

Modbus has inherent security limitations, such as no authentication or encryption. It also has limited data types and a relatively low bandwidth.

How do I handle different data types in Modbus registers?

You'll need to implement data type conversion and interpretation in your AI agent based on the Modbus device's documentation.

Key Features

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Metrics

Discovered2/14/2026

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Modbus

Overview

Connections & Capabilities

Connects To

Capabilities

Client Compatibility

Quickstart

Claude Desktop Config

Environment Variables

Tools (7)

Security

Safety Score

Positive

Risks

Use Cases

Industrial Automation

Building Management Systems

Data Analysis

Predictive Maintenance

Who Is This For?

Best For

Not Ideal For

Autonomy & Execution

FAQ

What Modbus modes are supported?

How do I secure the Modbus connection?

What happens if a write operation fails?

Can I use this MCP server with multiple Modbus devices?

How do I monitor the performance of the Modbus connection?

What are the limitations of the Modbus protocol?

How do I handle different data types in Modbus registers?

Key Features

Metrics

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