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sequentialthinking

A tool for step-by-step problem solving that can revise earlier thoughts, branch into alternatives and change the number of steps.

View on GitHub

Kind: MCP server
Works with: Any agent
Source: MCP Reference Servers @ 51b6382a3e82
Path: src/sequentialthinking/README.md
License: Apache-2.0
Jobs: Planning

InstallAdd it as an MCP server.

npx -y @modelcontextprotocol/server-sequential-thinking

# Sequential Thinking MCP Server

An MCP server implementation that provides a tool for dynamic and reflective problem-solving through a structured thinking process.

Published on npm as [`@modelcontextprotocol/server-sequential-thinking`](https://www.npmjs.com/package/@modelcontextprotocol/server-sequential-thinking).

## Features

- Break down complex problems into manageable steps
- Revise and refine thoughts as understanding deepens
- Branch into alternative paths of reasoning
- Adjust the total number of thoughts dynamically
- Generate and verify solution hypotheses
- Serves both protocol eras on stdio: 2026-07-28 clients (`server/discover`, no handshake) and 2025-era clients (`initialize`). The thought history lasts as long as the client's connection, on either era

## Tool

### sequential_thinking

Facilitates a detailed, step-by-step thinking process for problem-solving and analysis.

**Inputs:**
- `thought` (string): The current thinking step
- `nextThoughtNeeded` (boolean): Whether another thought step is needed
- `thoughtNumber` (integer): Current thought number
- `totalThoughts` (integer): Estimated total thoughts needed
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