Sequential Thinking MCP server

Last verified: 2026-09

A scratchpad that forces the model to break work into steps.

Official reference Developer tools No API key Claude Desktop, Cursor, Windsurf, Claude Code, VS Code

What it does

A scratchpad tool that makes the model write a chain of thoughts before answering. No external data, no secrets. Useful when you want to see the plan; easy to overuse.

It sits in Developer tools: Split this category in two.

Good for

Force a multi-step plan the host will show as a thought list.
Break a refactor into ordered steps you can reject mid-way.
Debug a client by watching it record thoughts — then remove the server.
Skip it for lookup work; hosts already reason.

Tools

sequentialthinking — Append or revise a thought step.

Config (Claude Desktop / Cursor / Windsurf)

Paste the JSON below. Same mcpServers shape. Replace placeholder paths and secrets. Windows paths look like C:\\Users\\you\\project, not /path/to. Host-side steps →

Claude Desktop

OS	Config file
macOS	`~/Library/Application Support/Claude/claude_desktop_config.json`
Windows	`%APPDATA%\Claude\claude_desktop_config.json` (usually `C:\Users\<you>\AppData\Roaming\Claude\`)
Linux	`~/.config/Claude/claude_desktop_config.json`

Cursor

Scope	macOS / Linux	Windows
This project	`.cursor/mcp.json` in the repo root
This user	`~/.cursor/mcp.json`	`%USERPROFILE%\.cursor\mcp.json`

Windsurf

OS	Config file
macOS / Linux	`~/.codeium/windsurf/mcp_config.json`
Windows	`%USERPROFILE%\.codeium\windsurf\mcp_config.json`

{
  "mcpServers": {
    "sequential_thinking": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-sequential-thinking"
      ]
    }
  }
}

Windsurf remote MCP: use serverUrl instead of url if the block below is HTTP.

One-liner: npx -y @modelcontextprotocol/server-sequential-thinking

Secrets it wants: none

Source repo →

How to get started

Add the JSON. No env.
Ask a multi-step question and tell the model to use sequential thinking.
Turn it off if the extra steps just slow simple tasks.

Access risk

None beyond wasting tokens. Thoughts can echo secrets you already pasted in the chat.

When to skip it

Skip it for lookup tasks (Fetch, GitHub). Hosts already do chain-of-thought without this server.

Instead: Everything.

OfficialEverythingReference server that exercises the whole MCP protocol.

Vs alternatives

Server	Official?	Needs a secret?	Best for
Sequential Thinking	Yes	No	A scratchpad that forces the model to break work into steps.
Everything	Yes	No	Reference server that exercises the whole MCP protocol.

More in Developer tools

OfficialEverythingReference server that exercises the whole MCP protocol. OfficialGitRead a local git repo: log, diff, status. OfficialGitHubRepos, issues, PRs, and file contents on GitHub. OfficialGitLabProjects, issues, and merge requests on GitLab.

All 18 in this category →

FAQ

Does this make the model smarter?

Sometimes it makes the plan readable. It does not add tools to the world. Skip it for 'what is in this file'.

Do I leave it installed?

No need. It is a scratchpad. Install for a hard planning session if you like the UI, then drop it.

Official?

Yes — reference server. No secrets.

Sequential Thinking or Everything?

Everything is a protocol test bed. Sequential Thinking is a reasoning scratchpad. Neither talks to your systems.