Industrial MCP servers by write policy
As of 3 November 2026, OT AI Hub lists 21 industrial MCP servers. The groups below use the same write-policy labels as the methodology page. Is it safe to connect AI to a PLC? explains what to do with the count before a pilot.
This is not a safety case. The counts describe the public tool surface on each entry's last-verified date. They do not certify a server, a model, a network, or a plant. A gated write is still a write once you arm it.
- Read-only1
Proxus Industrial MCP Server
- Writes gated14
Ignition MCP Module, ignition-mcp (community), IndustriConnect BACnet MCP, IndustriConnect DNP3 MCP, IndustriConnect EtherCAT MCP, IndustriConnect EtherNet/IP MCP, IndustriConnect Modbus MCP, IndustriConnect MQTT / Sparkplug MCP, IndustriConnect OPC UA MCP, IndustriConnect PROFIBUS MCP, IndustriConnect PROFINET MCP, IndustriConnect S7 MCP, plctap, and twincat-mcp
- Writes exposed5
AWS IoT SiteWise MCP Server, FieldWorks protocol adapters, kukapay/modbus-mcp, kukapay/opcua-mcp, and OPC Foundation OPC UA MCP
- Inside the IDE1
CODESYS Development System MCP Server