Sem MCP Server: Install & Setup

Install Sem in Claude Code

Claude Code

claude mcp add sem -- npx -y @ataraxy-labs/sem

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "sem": {
      "command": "npx",
      "args": [
        "-y",
        "@ataraxy-labs/sem"
      ]
    }
  }
}

Entity-level code intelligence: semantic diff, impact analysis, blame, and context for AI agents

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

Run: claude mcp add sem -- npx -y @ataraxy-labs/sem

software-mansion/argent

Drive iOS Simulators, Android emulators, TVs and Electron/web apps from your coding agent

mock-server/mockserver-monorepo

Mock, record/replay, verify and chaos-test any HTTP, REST, gRPC or LLM dependency over MCP.

dgunning/edgartools

Open-source SEC EDGAR toolkit — 13 tools, 7 prompts, every filing type. No API key required.

callstack/agent-device

Open source device layer for AI agents: control mobile, web, TV, and desktop apps over MCP

jgravelle/jcodemunch-mcp

Retrieves code by symbol via tree-sitter, so an agent reads the function it needs, not the file.

homeassistant-ai/ha-mcp

Comprehensive Model Context Protocol server for managing Home Assistant through AI assistants.