OpcuaSAFE
An MCP server that connects to OPC UA-enabled industrial systems.
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
An MCP server that connects to OPC UA-enabled industrial systems, allowing AI agents to monitor, analyze, and control operational data in real time.
This project is ideal for developers and engineers looking to bridge AI-driven workflows with industrial automation systems.
Features
- Read OPC UA Nodes: Retrieve real-time values from industrial devices.
- Write to OPC UA Nodes: Control devices by writing values to specified nodes.
- Browse nodes: Request to list allopcua nodes
- Read multiple OPC UA Nodes: Retrieve multiple real-time values from devices.
- Write to multiple OPC UA Nodes: Control devices by writing values to multiple nodes.
- Seamless Integration: Works with MCP clients like Claude Desktop for natural language interaction.
Tools
The server exposes five tools:
- `read_opcua_node`:
- Description: Read the value of a specific OPC UA node.
- Parameters:
node_id(str): OPC UA node ID (e.g.,ns=2;i=2).- Returns: A string with the node ID and its value (e.g., "Node ns=2;i=2 value: 42").
- `write_opcua_node`:
- Description: Write a value to a specific OPC UA node.
- Parameters:
node_id(str): OPC UA node ID (e.g.,ns=2;i=3).value(str): Value to write (converted based on node type).- Returns: A success or error message (e.g., "Successfully wrote 100 to node ns=2;i=3").
- `Browse nodes`:
- Description: Read the value of a specific OPC UA node.
- `Read multiple OPC UA Nodes`:
- Description: Read the value of a specific OPC UA node.
- `Write to multiple OPC UA Nodes`:
- Description: Read the value of a specific OPC UA node.
Example Prompts
- "What’s the value of node ns=2;i=2?" → Ret
bc60793c18ebOBSERVED · 2026-10-09Connect
Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.
claude mcp add opcua-mcp -- uvx opcua-mcp
{
"mcpServers": {
"opcua-mcp": {
"command": "uvx",
"args": [
"opcua-mcp"
]
}
}
}Exposed tools (5)
3 read · 2 write · 0 destructive.
| Tool | Risk | Description |
|---|---|---|
browse_opcua_node_children | read | |
read_multiple_opcua_nodes | read | |
read_opcua_node | read | |
write_multiple_opcua_nodes | write | |
write_opcua_node | write |
Trust audit
SAFEgrade B · trust 89/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | PASS |
| L1 | Static analysis of the code | PASS |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | PASS |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- none-observed
- Network
- none-observed
- Shell
- none-observed
- Dependencies
- pinned
- Secrets in source
- none-found
Findings (0)
No findings outside the package's declared scope.
Gates applied: no_behavioural_pass.
bc60793c18ebfull audit observations/trust-audit/mcp-server/kukapay__opcua.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-09 | bc60793c18eb | SAFE | B | 89 | first audit |
Questions
What is the Opcua MCP server?
An MCP server that connects to OPC UA-enabled industrial systems.
What tools does Opcua expose?
5 in total: 3 read-only, 2 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.
Is Opcua safe to connect to an agent?
The audit found nothing in the source that contradicts what it says it does, and graded it B (89/100). Grade A is held back for packages that have also passed a sandboxed behavioural run, which is why a clean server reads B.
What credentials does Opcua need?
No credential environment variables were found in its source, so it appears to need none.
How current is this page?
The grade is for one exact copy of the source (bc60793c18eb), read on 2026-10-09. The repository is watched and re-audited when it changes.