Sem MCP Server

Semantic version control built on Git. Instead of lines changed, sem tells you what entities changed: functions, methods, classes. It runs locally over stdio via the published package.

People connecting developer tools tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Rust.

VERIFIED ACTIVE

LAST COMMIT 2026-08-24 · ★ 3,309 · #6 OF 139 MAINTAINED DEVELOPER TOOLS · VERIFIED 2026-08-25

Apache-2.0 · Rust servers · how we verify → /methodology

01 · Install Sem

before you install - you'll need

SEM_NO_TELEMETRY

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

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

Claude Desktop / Cursor / VS Code - add to config

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

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license Apache-2.0 - declared in the repository

npm package @ataraxy-labs/sem - published under the repo owner's npm scope (@ataraxy-labs)

registry namespace io.github.Ataraxy-Labs is GitHub-verified and matches the repo owner

03 · What Sem can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.23.1 · 2026-08-22

v0.23.0 · 2026-08-22

v0.22.1 · 2026-08-16

04 · Who maintains Sem

sem is maintained by ataraxy-labs. It's the only MCP server we track from this author; the repo dates to Feb 2026.

05 · Facts

repository: github.com/ataraxy-labs/sem
website: https://ataraxy-labs.com/
category: developer tools - ranked #6 of 139 actively-maintained developer tools servers as of 2026-08-25.
release cadence: 10+ releases in the last 90 days (latest 2026-08-22)
registry: io.github.Ataraxy-Labs/sem (active, first published 2026-07-03 · 9 versions)
packages: npm:@ataraxy-labs/sem

06 · Sem FAQ

What is Sem?

Semantic version control built on Git. Instead of lines changed, sem tells you what entities changed: functions, methods, classes. It runs locally over stdio via the published package.

Is Sem still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-24 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install Sem?

Run `npx -y @ataraxy-labs/sem`. The README documents one environment variable (SEM_NO_TELEMETRY) to set first. You can also paste the ready-made client config above.

Does Sem run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Sem

Alternatives to Sem

Maintained developer tools servers if Sem isn't the fit.

Pairs well with

Servers that cover what Sem doesn't - only shown when the pairing reason fits the companion.

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