---
title: Configure OPC Server
slug: api-docs/configure-opc-server
docTags: 
createdAt: 2026-05-11T22:14:36.677Z
---

# Configure OPC UA Server with Tags

**UI trigger**: OPC UA -> Import Tags -> Start Server.

Exposes Litmus Edge's DeviceHub tags through the embedded OPC UA server so downstream OPC UA clients can subscribe.

## Step table

| Step | API Name                  | Method | Endpoint / GraphQL Operation                        | Notes                                   | Output             |
| ---- | ------------------------- | ------ | --------------------------------------------------- | --------------------------------------- | ------------------ |
| 1    | Get Node Root             | `POST` | `{{edgeUrl}}/opcua/v2` -> `GetNodeRoot`             | See current OPC UA hierarchy            | Existing node tree |
| 2a   | Import ALL DH Tags        | `POST` | `{{edgeUrl}}/opcua/v2` -> `ImportAllDHTags`         | Imports every DeviceHub tag into OPC UA | Nodes created      |
| 2b   | Import Some DH Tags       | `POST` | `{{edgeUrl}}/opcua/v2` -> `ImportSomeDeviceHubTags` | Selective import by device or tag IDs   | Nodes created      |
| 3    | Start OPC UA Service      | `POST` | `{{edgeUrl}}/opcua/v2` -> `StartOPCUAService`       | Starts the OPC UA server                | Server running     |
| 4    | Get Service Configuration | `POST` | `{{edgeUrl}}/opcua/v2` -> `GetServiceConfiguration` | Verify endpoint URL, auth settings      | Config object      |

## Note: server vs client

This workflow configures the **server** that Litmus Edge exposes (re-exporting DH tags). It is distinct from the **OPC UA Advanced client driver** used to read data **from** external OPC UA servers - that lives under DeviceHub.

## See also

- [OPC UA Advanced Driver concept](#)
- [OPC UA reference](#)