Spec Left MCP Server

SpecLeft keeps feature intent and test coverage aligned by turning plans into version-controlled specs, then generating pytest test skeletons from those specs. It runs locally over stdio via the published package.

People who work with planning, pytest and sdd and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-04-15 · ★ 3 · #45 OF 66 MAINTAINED MAPS & LOCATION · VERIFIED 2026-09-18

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

01 · Install Spec Left

Claude Code

claude mcp add specleft-specleft -- uvx specleft

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "specleft-specleft": {
      "command": "uvx",
      "args": [
        "specleft"
      ]
    }
  }
}

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

pypi package specleft - check the name against the project README before installing (PyPI has no namespace ownership)

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

03 · What Spec Left can do

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

Latest releases

v0.4.0 · 2026-02-26

Publish MCP Pipeline · Add MCP publish workflow · MCP Fix Publish pipeline · SpecLeft becomes fully open source · Bump python-frontmatter from 1.0.1 to 1.1.0 · Bump pyyaml from 6.0.2 to 6.0.3

v0.3.0 · 2026-02-22

Local agent github workflow · Align CLI version with package metadata (#87) · Add SpecLeft skill file security and integrity workflow (#95) · Optimize CLI output defaults for agent efficiency (#94) · Add MCP server for…

v0.2.2 · 2026-02-11

Fix skeleton/validate/stats not finding plan-generated specs

04 · Who maintains Spec Left

SpecLeft is maintained by specleft. It's the only MCP server we track from this author; the repo dates to Jan 2026.

05 · Facts

repository: github.com/specleft/specleft
website: https://specleft.dev/
category: maps & location - ranked #45 of 66 actively-maintained maps & location servers as of 2026-09-18.
registry: io.github.SpecLeft/specleft (active, first published 2026-02-22 · 2 versions)
packages: pypi:specleft

06 · Spec Left FAQ

What is Spec Left?

Is Spec Left still maintained?

Yes - as of 2026-09-18, its last commit was 2026-04-15. We re-verify nightly.

How do I install Spec Left?

Run `uvx specleft`. You can also paste the ready-made client config above.

Does Spec Left run locally?

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

07 · Alternatives to Spec Left

Alternatives to Spec Left

Maintained maps & location servers if Spec Left isn't the fit.

More maps & location MCP servers · Open Eagle Eye · Dadata MCP · Notra · Variflight MCP · Switzerland MCP 🇨🇭

More Python MCP servers · Lumino MCP Server · Sqlsure · Dev Track · Agendum · Repo2graph · see all