OfficialMCP server · stdio

🧠Sequential Thinking

By Anthropic· 86,000

Add a structured, step-by-step reasoning tool for breaking down hard problems.

What it does

The Sequential Thinking reference server gives Claude a structured place to think.

What it gives Claude:

A tool for breaking a hard problem into ordered steps
The ability to revise or branch earlier thoughts
More deliberate reasoning on multi-step or ambiguous tasks

No credentials, no external calls — it's a reasoning scaffold that runs locally.

Installation

1
Make sure Claude is on your device and in your terminal.
MCP servers register with Claude Code via claude mcp add. You need Claude Code installed first:
```
npm i -g @anthropic-ai/claude-code
```

Set up the server on your machine.

Setup

claude mcp a•• ••••••••••••••••••• •• •••• •• ••• •• •••••••••••••••••••••••••••••••••••••••••••••••••••••••

Runs the project's installer (clone + dependencies + config). Follow any prompts. After this finishes, the server is ready to register with Claude Code in the next step.

Restart Claude Code.
Quit and reopen Claude Code so it picks up the new MCP registration. Run /mcp inside Claude Code to confirm the server is connected.
Use it.
Ask Claude naturally. It will call the server's tools when your request matches one. Tool calls show up inline so you can see exactly what Claude is doing.

Prefer to read the source first? Open on GitHub.