Cruxible Core MCP Server

Cruxible is a governed state engine for AI agents. It produces a Crux: an executable artifact of your domain knowledge with a code-like lifecycle - typed, reviewed, versioned, auditable, and tested against outcomes. It runs locally over stdio via the published package.

People connecting this server to Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-08-25 · ★ 16 · #341 OF 848 MAINTAINED OTHER · VERIFIED 2026-08-25

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

01 · Install Cruxible Core

before you install - you'll need

Set CRUXIBLE_SERVER_STATE_DIR before connecting.

Claude Code

claude mcp add cruxible-ai-cruxible-core -- uvx cruxible-core

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "cruxible-ai-cruxible-core": {
      "command": "uvx",
      "args": [
        "cruxible-core"
      ]
    }
  }
}

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 cruxible-core - check the name against the project README before installing (PyPI has no namespace ownership)

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

03 · What Cruxible Core can do

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

Latest releases

v0.3.2 · 2026-08-07

See CHANGELOG.md for this release's notes.

v0.3.1 · 2026-08-04

See CHANGELOG.md for this release's notes.

v0.3.0 · 2026-07-31

See CHANGELOG.md for this release's notes.

04 · Who maintains Cruxible Core

cruxible-core is maintained by cruxible-ai. It's the only MCP server we track from this author; the repo dates to Mar 2026.

05 · Facts

repository: github.com/cruxible-ai/cruxible-core
category: other - ranked #341 of 848 actively-maintained other servers as of 2026-08-25.
release cadence: 10+ releases in the last 90 days (latest 2026-08-07)
registry: io.github.cruxible-ai/cruxible-core (active, first published 2026-03-06)
packages: pypi:cruxible-core

06 · Cruxible Core FAQ

What is Cruxible Core?

Is Cruxible Core still maintained?

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

How do I install Cruxible Core?

Run `uvx cruxible-core`. The README documents one environment variable (CRUXIBLE_SERVER_STATE_DIR) to set first. Set CRUXIBLE_SERVER_STATE_DIR before connecting. You can also paste the ready-made client config above.

Does Cruxible Core 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 Cruxible Core

Alternatives to Cruxible Core

Maintained other servers if Cruxible Core isn't the fit.

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