Opcua MCP vs MCP Rs485
A side-by-side look at the Opcua MCP and MCP Rs485 MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Opcua MCP for industrial & iot work; choose MCP Rs485 for industrial & iot as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Opcua MCP when
- You need dedicated capabilities in the Industrial & IoT domain.
- Its auth model fits you: No auth required.
- You have the keys it needs:
OPCUA_SERVER_URL. - You want tools like
Description, Returns.
Choose MCP Rs485 when
- You need dedicated capabilities in the Industrial & IoT domain.
- You prefer a local stdio subprocess transport.
- You want tools like
list_ports, connect_rs485, disconnect_rs485.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Industrial & IoT | Industrial & IoT |
| Quality signal | 37/100 · Fair | 47/100 · Fair |
| Install command | Not confirmed yet | Confirmed |
| Transport | — | Local subprocess (stdio) |
| Auth | No auth required | Not declared |
| Pricing | Free | Not declared |
| Required env vars | OPCUA_SERVER_URL | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 30 | 0 |
| Directory activity | 4 views 0 installs 0 upvotes | 0 views 0 installs 0 upvotes |
| Tools | 2 | 6 |
| Full listing | View Opcua MCP | View MCP Rs485 |
Tools & capabilities
Opcua MCP tools 2
DescriptionRead the value of a specific OPC UA node.ReturnsA string with the node ID and its value (e.g., "Node ns=2;i=2 value: 42").
MCP Rs485 tools 6
list_portsLists all available serial ports on the systemconnect_rs485Opens a connection to an RS485 devicedisconnect_rs485Closes an RS485 connectionread_rs485Reads data from an open RS485 connectionwrite_rs485Writes data to an RS485 connectionget_connection_statusGets the status of an RS485 connection
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Opcua MCP
No confirmed install command for Opcua MCP yet — follow the setup steps linked from its listing page rather than a guessed package name.
MCP Rs485
{
"mcpServers": {
"mcp-rs485": {
"command": "uvx",
"args": [
"mcp-rs485"
]
}
}
}
Frequently asked questions
Opcua MCP is categorized under Industrial & IoT and uses an install path we have not confirmed yet. MCP Rs485 belongs to Industrial & IoT and uses a local stdio subprocess. Pick Opcua MCP for industrial & iot work and MCP Rs485 for industrial & iot.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client. Opcua MCP has no confirmed install command yet — follow its own setup instructions.
Opcua MCP is listed as free. Auth: no auth required. MCP Rs485 has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add kukapay-opcua-mcp and mcp-rs485 as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Opcua MCP has a quality signal of 37/100 (Fair) with 4 views, 0 installs and 30 GitHub stars. MCP Rs485 has 47/100 (Fair) with 0 views, 0 installs and 0 GitHub stars.