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

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

How do I install Javalens MCP or Langfuse MCP Java 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 Javalens MCP and Langfuse MCP Java free or paid?

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

Which MCP server has more tools and community activity?

Javalens MCP lists 75 tools with 1 views and 38 GitHub stars. Langfuse MCP Java lists 55 tools with 3 views and 3 GitHub stars.

Can I use both Javalens MCP and Langfuse MCP Java 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

Javalens MCP vs Langfuse MCP Java

In-depth architectural comparison of the Javalens MCP and Langfuse MCP Java 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

Javalens MCP

Monitoring · Local stdio

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

Langfuse MCP Java

Monitoring · Local stdio

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

Verdict Summary: Choose Javalens MCP if you need specialized Monitoring tools running via a local process. Choose Langfuse MCP Java 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 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: search_symbols, go_to_definition, find_references.

Explore Javalens MCP Details

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: .

Feature & Specification Comparison

Specification	Javalens MCP pzalutski-pixel Monitoring	Langfuse MCP Java log-logn Monitoring
Summary	56 semantic Java analysis tools via Eclipse JDT. Compiler-accurate navigation, refactoring, find references, call hierarchy, and code metrics for AI agents.	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)
Category & Scope

Tools & Capabilities Breakdown

Javalens MCP Tools (75)

search_symbols

Search types, methods, fields by glob pattern

go_to_definition

Navigate to symbol definition

find_references

Find all usages of a symbol

find_implementations

Find interface/class implementations

get_type_hierarchy

Get inheritance chain

get_document_symbols

Get all symbols in a file

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).

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"
      }
    }
  }
}

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"
      }
    }
  }
}

Frequently Asked Questions

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

More alternatives to Javalens MCP More alternatives to Langfuse MCP Java Monitoring category hub Canonical compare URL