Jev MCP Server

用 TypeSafe Jev（System One 决策模型）做 agent harness 工程实验的技术仓库：评测框架、基准报告、可运行的集成工具（MCP server、skill router）。. It runs locally over stdio via the published package.

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

VERIFIED ACTIVE

LAST COMMIT 2026-09-21 · ★ 2 · #401 OF 998 MAINTAINED OTHER · VERIFIED 2026-09-30

Python servers · how we verify → /methodology

01 · Install Jev

before you install - you'll need

TYPESAFE_API_KEY

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

Claude Code

claude mcp add aitejiu-jev-harness-lab -- uvx jev-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "aitejiu-jev-harness-lab": {
      "command": "uvx",
      "args": [
        "jev-mcp"
      ]
    }
  }
}

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

repo age created 2026-09-19 - young repo, little track record yet

license no standard license detected - usage rights unclear; check the repo before commercial use

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

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

03 · Who maintains Jev

jev is maintained by aitejiu. It's the only MCP server we track from this author; the repo dates to Sep 2026.

04 · Facts

repository: github.com/aitejiu/jev-harness-lab
category: other - ranked #401 of 998 actively-maintained other servers as of 2026-09-30.
registry: io.github.Aitejiu/jev (active, first published 2026-09-21)
packages: pypi:jev-mcp

05 · Jev FAQ

What is Jev?

Is Jev still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-21. We re-verify nightly.

How do I install Jev?

Run `uvx jev-mcp`. The README documents one environment variable (TYPESAFE_API_KEY) to set first. You can also paste the ready-made client config above.

Does Jev 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.

06 · Alternatives to Jev

Alternatives to Jev

Maintained other servers if Jev isn't the fit.

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