Chat Crystal MCP Server

Local-first AI PKM for coding conversations Website · Download Desktop · npm · Docs · 简体中文

People who work with codex, electron and knowledge graph and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-14 · ★ 58 · #48 OF 304 MAINTAINED MEMORY · VERIFIED 2026-09-18

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

01 · Install Chat Crystal

before you install - you'll need

The README does not document required environment variables for a basic install.

Claude Code

claude mcp add zengliangyi-chatcrystal -- npx -y chatcrystal

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "zengliangyi-chatcrystal": {
      "command": "npx",
      "args": [
        "-y",
        "chatcrystal"
      ]
    }
  }
}

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 chatcrystal - unscoped; check the name against the project README before installing

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

03 · What Chat Crystal can do

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

Latest releases

v0.6.0 · 2026-09-05

Runtime & Dependencies · Raised the supported runtime and CI/Docker baseline to Node.js 24 and completed the major migrations to Vercel AI SDK 7, React 19, Vite 8, Tailwind CSS 4, Electron 44, and the current Fastify 5…

v0.5.4 · 2026-09-03

OrcaRouter · Added OrcaRouter as a first-class LLM provider with its OpenAI-compatible API endpoint built in. · Enabled authenticated OrcaRouter model discovery through the searchable model picker in Settings. · Added…

v0.5.3 · 2026-06-27

Settings Model Discovery · Added model-list discovery to the local Settings page for both LLM and Embedding configuration. · Added a searchable fetched-model picker while keeping the model field manually editable.…

04 · Who maintains Chat Crystal

ChatCrystal is maintained by zengliangyi. It's the only MCP server we track from this author; the repo dates to Mar 2026.

05 · Facts

repository: github.com/zengliangyi/chatcrystal
website: https://zengliangyi.github.io/ChatCrystal/
category: memory - ranked #48 of 304 actively-maintained memory servers as of 2026-09-18.
release cadence: 3 releases in the last 90 days (latest 2026-09-05)
registry: io.github.ZengLiangYi/chatcrystal (active, first published 2026-06-12 · 7 versions)
packages: npm:chatcrystal

06 · Chat Crystal FAQ

What is Chat Crystal?

Local-first AI PKM for coding conversations Website · Download Desktop · npm · Docs · 简体中文

Is Chat Crystal still maintained?

Yes - as of 2026-09-18, its last commit was 2026-09-14 and it shipped 3 releases in the last 90 days. We re-verify nightly.

How do I install Chat Crystal?

Run `npx -y chatcrystal`. The README does not document required environment variables for a basic install. You can also paste the ready-made client config above.

Does Chat Crystal 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 Chat Crystal

Alternatives to Chat Crystal

Maintained memory servers if Chat Crystal isn't the fit.

Pairs well with

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

More memory MCP servers · ZenBrain Memory · Local Keep · Ori Memory · Waggle MCP · Neuromcp

More TypeScript MCP servers · Zenrows MCP · GitLab MCP · Draw2agent · Llmmcp · see all