Vulcanus MCP Server

Your coding agent starts every session cold. You re-explain the architecture, repeat decisions you already made, and watch it break a rule you set last week. The context lives in your head and in a scrollback buffer that is already gone. It runs locally over stdio via the published package.

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

VERIFIED ACTIVE

LAST COMMIT 2026-08-18 · ★ 4 · #32 OF 139 MAINTAINED PRODUCTIVITY · VERIFIED 2026-08-25

MIT · TypeScript servers · how we verify → /methodology

01 · Install Vulcanus

Claude Code

claude mcp add sunsatosolutions-vulcanus -- npx -y @sunsato/vulcanus

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "sunsatosolutions-vulcanus": {
      "command": "npx",
      "args": [
        "-y",
        "@sunsato/vulcanus"
      ]
    }
  }
}

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 2026-07-23 - young repo, little track record yet

license MIT - declared in the repository

npm package @sunsato/vulcanus - the @sunsato scope differs from the repo owner (sunsatosolutions); confirm it's the project's official package

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

03 · What Vulcanus can do

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

Limitations (from the README)

The generated system layer is a fixed list, so a note you write under the system directory would otherwise read as unmanaged, and the System Hub linking it would read as over-linked - two findings for doing nothing wrong. systemNotes in vulcanus.json names those notes: They are branded like every other system note, so Release Notes resolves to Release Notes in a branded vault. Declaring one only makes the vault aware

Latest releases

v0.5.0 · 2026-08-18

Added - the vault speaks the operator's language · Generated notes are written in the language the vault records, not only the · wizard. 501 pieces of prose across the three generators that write what a person · reads…

v0.4.7 · 2026-08-17

Added - projects can record what they are and who may hear about them · Two optional fields on each project in vulcanus.json. kind is one of · umbrella, product, lab, service-brand, client, client-product and · says…

v0.4.6 · 2026-08-17

Fixed - reading a manifest silently dropped hand-added fields · Every command that read vulcanus.json rebuilt it field by field, so any key · this CLI did not recognize was gone the next time the file was written. That…

04 · Who maintains Vulcanus

Vulcanus is maintained by sunsatosolutions. It's the only MCP server we track from this author; the repo dates to Jul 2026.

05 · Facts

repository: github.com/sunsatosolutions/vulcanus
website: https://vulcanus.sunsato.com/
category: productivity - ranked #32 of 139 actively-maintained productivity servers as of 2026-08-25.
release cadence: 10+ releases in the last 90 days (latest 2026-08-18)
registry: io.github.sunsatosolutions/vulcanus (active, first published 2026-08-14 · 5 versions)
packages: npm:@sunsato/vulcanus

06 · Vulcanus FAQ

What is Vulcanus?

Is Vulcanus still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-18 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install Vulcanus?

Run `npx -y @sunsato/vulcanus`. You can also paste the ready-made client config above.

Does Vulcanus 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 Vulcanus

Alternatives to Vulcanus

Maintained productivity servers if Vulcanus isn't the fit.

Pairs well with

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

More productivity MCP servers · Sunub Obsidian MCP Server · Obsidian Brain · TaskTime Pro · Cosmos MCP · Temporal Cortex Calendar MCP

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