An MCP server that provides a structured sequential_thinking tool to break down complex problems into verifiable, revisable steps.
Sequential Thinking is an MCP server from the Model Context Protocol project that adds a structured sequential_thinking tool to compatible hosts. Once connected, the host model can break complex problems into numbered thoughts, revise earlier steps, branch into alternative reasoning paths, and adjust how many thoughts the task needs as understanding grows.
Built for developers working with MCP-aware clients like Claude Desktop or VS Code, it suits debugging, planning, and design work where the full scope is unclear. Published on npm as @modelcontextprotocol/server-sequential-thinking under the MIT License.
Sequential Thinking is an MCP server implementation that provides a tool for dynamic and reflective problem-solving through a structured thinking process.
You do not call sequential_thinking directly by hand unless your client exposes raw tool calls. Instead, connect the server to an MCP-aware host and ask the model to think through a problem step by step; the host decides when to call the tool.
The tool accepts thought, nextThoughtNeeded, thoughtNumber, and totalThoughts. Optional fields include isRevision, revisesThought, branchFromThought, branchId, and needsMoreThoughts.
If your host or inspector shows tool activity, you should see repeated calls to sequential_thinking with fields such as thought, thoughtNumber, totalThoughts, and nextThoughtNeeded. Revision or branching fields may also appear when reasoning changes course.
Yes. Set the DISABLE_THOUGHT_LOGGING environment variable to true.
The MCP server is licensed under the MIT License, so you are free to use, modify, and distribute the software subject to its terms.
