Sequential Thinking MCP Server

AIstdiov2026.1.26

Provides a structured sequential thinking tool through the Model Context Protocol. Enables AI agents to break down complex problems into numbered thought steps, revise previous thoughts, branch into alternative paths, and adjust the total number of steps dynamically. Useful for multi-step reasoning, planning, and analysis tasks that benefit from explicit step-by-step thinking.

thinking reasoning planning problem-solving chain-of-thought

Connect

Add this configuration to .claude/mcp.json

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

Tools (1)

sequentialthinking

Record a sequential thinking step for structured problem-solving. Supports revising previous thoughts and branching into alternative reasoning paths.

{
  "type": "object",
  "required": [
    "thought",
    "thoughtNumber",
    "totalThoughts",
    "nextThoughtNeeded"
  ],
  "properties": {
    "thought": {
      "type": "string",
      "description": "The content of the current thinking step"
    },
    "branchId": {
      "type": "string",
      "description": "Identifier for the alternative reasoning branch"
    },
    "isRevision": {
      "type": "boolean",
      "description": "Whether this revises a previous thought"
    },
    "thoughtNumber": {
      "type": "integer",
      "description": "Current thought number in the sequence"
    },
    "totalThoughts": {
      "type": "integer",
      "description": "Estimated total number of thoughts needed (can be adjusted)"
    },
    "revisesThought": {
      "type": "integer",
      "description": "Which thought number this revises (if isRevision is true)"
    },
    "branchFromThought": {
      "type": "integer",
      "description": "Which thought to branch from for alternative reasoning"
    },
    "nextThoughtNeeded": {
      "type": "boolean",
      "description": "Whether another thought step is needed after this one"
    }
  }
}

Resources

This server does not expose any resources.

Prompts

This server does not expose any prompts.

Server Information

Author: Anthropic (@modelcontextprotocol)
Repository: https://github.com/modelcontextprotocol/servers
License: Apache-2.0
Version: 2026.1.26
Stars: 86,200
Last Updated: January 27, 2026