What is the key difference between Langfuse MCP Java and Javalens MCP?

Langfuse MCP Java belongs to the Monitoring category with local stdio execution, while Javalens MCP belongs to the Monitoring category with local stdio execution.

How do I install Langfuse MCP Java or Javalens MCP in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Langfuse MCP Java and Javalens MCP free or paid?

Langfuse MCP Java operates under a BYOK (Pay Provider Direct) model (API Key required). Javalens MCP operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Langfuse MCP Java lists 55 tools with 3 views and 3 GitHub stars. Javalens MCP lists 75 tools with 1 views and 37 GitHub stars.

Can I use both Langfuse MCP Java and Javalens MCP together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Langfuse MCP Java vs Javalens MCP

In-depth architectural comparison of the Langfuse MCP Java and Javalens MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Langfuse MCP Java

Monitoring · Local stdio

Quality: 53/100 (Good) | Auth: API Key required

Javalens MCP

Monitoring · Local stdio

Quality: 57/100 (Good) | Auth: No auth required

Verdict Summary: Choose Langfuse MCP Java if you need specialized Monitoring tools running via a local process. Choose Javalens MCP if your workspace requires Monitoring integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Langfuse MCP Java when:

You need dedicated capabilities in the Monitoring domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
You have access to required keys: LANGFUSE_PUBLIC_KEY, LANGFUSE_SECRET_KEY, LANGFUSE_HOST, LANGFUSE_TIMEOUT.
Primary tools included: fetch_traces, fetch_trace, find_exceptions.

Explore Langfuse MCP Java Details

Choose Javalens MCP when:

You need dedicated capabilities in the Monitoring domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
You have access to required keys: JAVA_PROJECT_PATH.
Primary tools included: .

Feature & Specification Comparison

Specification	Langfuse MCP Java log-logn Monitoring	Javalens MCP pzalutski-pixel Monitoring
Summary	Query Langfuse traces, debug exceptions, analyze sessions, scores, datasets, schema, observations and manage prompts. Full observability toolkit for LLM applications. (https://github.com/langfuse/langfuse)	56 semantic Java analysis tools via Eclipse JDT. Compiler-accurate navigation, refactoring, find references, call hierarchy, and code metrics for AI agents.
Category & Scope

Tools & Capabilities Breakdown

Langfuse MCP Java Tools (55)

fetch_traces

Paginated list of traces. Filter by `userId`, `name`, `sessionId`, `tags`, `fromTimestamp`, `toTimestamp`.

fetch_trace

Full detail of a single trace including nested observations, input/output, metadata, latency, and token usage. Requires `traceId`.

find_exceptions

Traces whose `level` equals `ERROR`. Supports time range and pagination.

find_exceptions_in_file

Error-level traces whose metadata contains a given file name substring. Requires `fileName`.

get_exception_details

Full detail of a single error trace. Requires `traceId`.

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Langfuse MCP Java Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "log-logn-langfuse-mcp-java": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/inspector"
      ],
      "env": {
        "LANGFUSE_PUBLIC_KEY": "YOUR_LANGFUSE_PUBLIC_KEY_HERE",
        "LANGFUSE_SECRET_KEY": "YOUR_LANGFUSE_SECRET_KEY_HERE",
        "LANGFUSE_HOST": "YOUR_LANGFUSE_HOST_HERE",
        "LANGFUSE_TIMEOUT": "YOUR_LANGFUSE_TIMEOUT_HERE"
      }
    }
  }
}

Javalens MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "pzalutski-pixel-javalens-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "javalens-mcp"
      ],
      "env": {
        "JAVA_PROJECT_PATH": "YOUR_JAVA_PROJECT_PATH_HERE"
      }
    }
  }
}

Frequently Asked Questions

Langfuse MCP Java is categorized under Monitoring and uses a local stdio subprocess. In contrast, Javalens MCP belongs to Monitoring using local stdio subprocess. Select Langfuse MCP Java when you need capabilities focused on monitoring and Javalens MCP when you require tools for monitoring.

More alternatives to Langfuse MCP Java More alternatives to Javalens MCP Monitoring category hub