Thoughtbox MCP Server

Multi-agent collaborative reasoning that's auditable. Thoughtbox is an MCP server for structured, multi-agent reasoning, with a companion web app for workspace and inspection flows. Every step is recorded as a structured thought in a persistent reasoning ledger that can be visualized, exported, and analyzed. It runs locally over stdio via the published package.

People who work with sequential thinking, thoughtbox and reasoning and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-07-15 · ★ 64 · #50 OF 120 MAINTAINED DEVOPS & MONITORING · VERIFIED 2026-09-18

MIT · TypeScript servers · how we verify → /methodology

01 · Install Thoughtbox

Claude Code

claude mcp add kastalien-research-thoughtbox -- npx -y @kastalien-research/thoughtbox

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "kastalien-research-thoughtbox": {
      "command": "npx",
      "args": [
        "-y",
        "@kastalien-research/thoughtbox"
      ]
    }
  }
}

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 MIT - declared in the repository

npm package @kastalien-research/thoughtbox - published under the repo owner's npm scope (@kastalien-research)

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

03 · Who maintains Thoughtbox

thoughtbox is maintained by kastalien-research. It's the only MCP server we track from this author; the repo dates to Oct 2025.

04 · Facts

repository: github.com/kastalien-research/thoughtbox
category: DevOps & monitoring - ranked #50 of 120 actively-maintained DevOps & monitoring servers as of 2026-09-18.
registry: io.github.Kastalien-Research/thoughtbox (active, first published 2025-11-25)
packages: npm:@kastalien-research/thoughtbox

05 · Thoughtbox FAQ

What is Thoughtbox?

Is Thoughtbox still maintained?

Yes - as of 2026-09-18, its last commit was 2026-07-15. We re-verify nightly.

How do I install Thoughtbox?

Run `npx -y @kastalien-research/thoughtbox`. You can also paste the ready-made client config above.

Does Thoughtbox 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.

06 · Alternatives to Thoughtbox

Alternatives to Thoughtbox

Maintained DevOps & monitoring servers if Thoughtbox isn't the fit.

Pairs well with

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

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