Postmancer vs Serena

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

	Postmancer A standalone MCP server for API testing and management — let AI assistants call REST APIs in natural language. Unverified stdio (local) No auth Stale TypeScript	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	TypeScript	Python
Transport	stdio (local)	stdio (local)
Auth	None	None
GitHub stars	28	12k
Last commit	10 months ago	23 days ago
Verified
Actively maintained
Install	`npm install -g postmancer`	`uvx --from git+https://github.com/oraios/serena serena start-mcp-server`
Repo	Open	Open

Verdict

Pick Postmancer if you prefer its approach (a standalone mcp server for api testing and management — let ai assistants call rest apis in natural language).

Pick Serena if you prefer the more popular, battle-tested option, and you need the broadest set of tools.

Add Postmancer

Install / run

npm install -g postmancer

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

{
  "mcpServers": {
    "postmancer": {
      "command": "npx",
      "args": [
        "-y",
        "postmancer"
      ],
      "env": {
        "LOG_LEVEL": "info"
      }
    }
  }
}

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

Postmancer or Serena — which is better?

Pick Postmancer if you prefer its approach (a standalone mcp server for api testing and management — let ai assistants call rest apis in natural language). Pick Serena if you prefer the more popular, battle-tested option, and you need the broadest set of tools.

Can I use both Postmancer 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 Postmancer and Serena work with Claude, Cursor and Windsurf?

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

View Postmancer →View Serena →More comparisons →