Official

Sequential Thinking MCP Server

Dynamic step-by-step reasoning processes to decompose and refine complex AI problem-solving.

Data last scanned today · Reviewed today

711 tool★ 88,628TypeScriptNOASSERTION

Overview

This server implements the sequential_thinking tool, designed to facilitate structured analysis by allowing models to break down tasks into discrete, manageable steps. It supports recursive refinement, enabling the AI to revise previous thoughts, branch into alternative reasoning paths, and dynamically adjust the total number of steps required to reach a conclusion. By utilizing this server, users can guide AI agents through complex planning, debugging, or comparative analysis tasks. The model interacts with the tool to maintain context across iterations, filtering out irrelevant information and adjusting its approach based on evolving understanding of the problem scope.

Our verdict

With a security score of 38/100, this server is classified as high-risk. The primary concern is the lack of any authentication method, meaning anyone with access to the configuration can execute commands. Furthermore, the repository is community-maintained rather than officially vendor-supported and operates under a NOASSERTION license, which may present compliance concerns for some users. It is recommended for development environments only.

Supports branching paths and revision of previous reasoning steps
Contains only three direct dependencies to minimize supply-chain surface area
Features real documentation within the repository README
Maintains an active development cycle with commits from seven days ago

Lacks any authentication mechanism for access control
Operates under an unverified NOASSERTION software license
Not officially maintained by a primary vendor organization

Setup

Claude Desktop

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

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows), then restart Claude Desktop. Some servers require API keys or tokens as environment variables — check the project's README and add an "env" object if needed.

No read-only mode — running this grants full read/write access.
No built-in authentication — anyone with access to this config can invoke every tool it exposes.