JavaLens vs Serena

A side-by-side comparison of two Developer Tools servers — tools, transport, auth, maintenance, and copy-paste config for each.

	JavaLens Compiler-accurate Java code analysis for AI agents, built on Eclipse JDT with 75 semantic tools. Unverified stdio (local) No auth Java	Serena LSP-powered coding agent toolkit: semantic symbol search, references and structural edits. Verified stdio (local) No auth Python
Category	Developer Tools	Developer Tools
Language	Java	Python
Transport	stdio (local)	stdio (local)
Auth	None	None
GitHub stars	31	12k
Last commit	11 days ago	23 days ago
Verified
Actively maintained
Install	`npx -y javalens-mcp`	`uvx --from git+https://github.com/oraios/serena serena start-mcp-server`
Repo	Open	Open

Verdict

Pick JavaLens if you need the broadest set of tools.

Pick Serena if you prefer the more popular, battle-tested option, and you want a verified, documented setup.

Add JavaLens

Install / run

npx -y javalens-mcp

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "javalens": {
      "command": "npx",
      "args": [
        "-y",
        "javalens-mcp"
      ],
      "env": {
        "JAVA_PROJECT_PATH": "/path/to/your/java/project"
      }
    }
  }
}

Add Serena

Install / run

uvx --from git+https://github.com/oraios/serena serena start-mcp-server

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "serena": {
      "command": "uvx",
      "args": [
        "--from",
        "git+https://github.com/oraios/serena",
        "serena",
        "start-mcp-server"
      ]
    }
  }
}

Requires `uv` (the Python package runner). Install it from https://docs.astral.sh/uv/ if `uvx` is not found.

FAQ

JavaLens or Serena — which is better?

Pick JavaLens if you need the broadest set of tools. Pick Serena if you prefer the more popular, battle-tested option, and you want a verified, documented setup.

Can I use both JavaLens and Serena?

Yes — MCP clients let you enable multiple servers at once. Add both configs to your client's mcpServers and use whichever tool fits the task.

Do JavaLens and Serena work with Claude, Cursor and Windsurf?

Both do. Copy the per-client config below into Claude Desktop, Cursor, or Windsurf.

View JavaLens →View Serena →More comparisons →