Exa MCP Server vs OPC UA MCP Server
A side-by-side look at the Exa MCP Server and OPC UA MCP Server MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Exa MCP Server for search & data extraction work as a local process; choose OPC UA MCP Server for industrial & iot over a hosted endpoint. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Exa MCP Server when
- You need dedicated capabilities in the Search & Data Extraction domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
- You want tools like
web_search_exa, web_fetch_exa.
Choose OPC UA MCP Server when
- You need dedicated capabilities in the Industrial & IoT domain.
- You prefer a remote HTTP/SSE transport.
- You want tools like
opcua_read, opcua_write, opcua_get_value.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Search & Data Extraction | Industrial & IoT |
| Quality signal | 73/100 · Great | 53/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Remote HTTP/SSE |
| Auth | No auth required | Not declared |
| Pricing | Free | Not declared |
| Required env vars | None listed | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 5,167 | 5 |
| Directory activity | 11 views 0 installs 0 upvotes | 4 views 0 installs 0 upvotes |
| Tools | 2 | 16 |
| Full listing | View Exa MCP Server | View OPC UA MCP Server |
Tools & capabilities
Exa MCP Server tools 2
web_search_exaSearch the web for any topic and get clean, ready-to-use content. Best for: Finding current information, news, facts, people, companies, or answering questions about any topic. Returns: Clean text content from top search results. Query tips: describe the ideal page, not keywords. "blog post comparing React and Vue performance" not "React vs Vue". Use category:people / category:company to search through Linkedin profiles / companies respectively. If highlights are insufficient, follow up with web_fetch_exa on the best URLs.web_fetch_exaRead a webpage's full content as clean markdown. Use after web_search_exa when highlights are insufficient or to read any URL. Best for: Extracting full content from known URLs. Batch multiple URLs in one call. Returns: Clean text content and metadata from the page(s).
OPC UA MCP Server tools 16
opcua_readRead one or more node values. Subscribed nodes are served from the live cache; others go live unless `max_age_ms` allows a cached value.opcua_writeWrite a value to a node. Validates the value's type against the node before writing.opcua_get_valueRead a single node's value - a convenience wrapper over `opcua_read`.opcua_get_value_by_nameRead a value by browse name instead of node ID, via the discovery index.opcua_browseList a node's immediate children.opcua_browse_nodesRecursively browse from a node up to a depth limit, nesting children under their parent.opcua_node_infoGet a node's metadata (data type, access level, etc.).opcua_find_similar_nodesFuzzy-match browse names against the discovery index.opcua_subscribeStart push-based updates for one or more nodes at a given interval.opcua_unsubscribeCancel a subscription, by ID or by naming one of its nodes.opcua_list_subscriptionsList active subscriptions.opcua_connectManage the connection explicitly (mainly relevant in stdio mode).- +4 more on the listing page
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.
Exa MCP Server
{
"mcpServers": {
"exa-labs-exa-mcp-server": {
"command": "npx",
"args": [
"-y",
"exa-mcp-server"
]
}
}
}
OPC UA MCP Server
{
"mcpServers": {
"opc-ua-mcp-server": {
"url": "https://xyz.trycloudflare.com/mcp"
}
}
}
Frequently asked questions
Exa MCP Server is categorized under Search & Data Extraction and uses a local stdio subprocess. OPC UA MCP Server belongs to Industrial & IoT and uses a remote HTTP/SSE transport. Pick Exa MCP Server for search & data extraction work and OPC UA MCP Server 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.
Exa MCP Server is listed as free. Auth: no auth required. OPC UA MCP Server 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 exa-labs-exa-mcp-server and opc-ua-mcp-server as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Exa MCP Server has a quality signal of 73/100 (Great) with 11 views, 0 installs and 5,167 GitHub stars. OPC UA MCP Server has 53/100 (Good) with 4 views, 0 installs and 5 GitHub stars.