MCP Think Tool
An MCP server implementation of Anthropic's Think Tool prompt engineering technique that enables Claude to break down complex problems and enhance its reasoning capabilities by providing a simple tool that echoes back thoughts.
What is MCP Think Tool?
MCP Think Tool is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to mcp server implementation of anthropic's think tool prompt engineering technique that enables claude to break down complex problems and enhance its reasoning capabilities by providing a simple tool th...
An MCP server implementation of Anthropic's Think Tool prompt engineering technique that enables Claude to break down complex problems and enhance its reasoning capabilities by providing a simple tool that echoes back thoughts.
This server falls under the Coding Agents category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- think
- get_thoughts
- clear_thoughts
- get_thought_stats
Use Cases
Maintainer
Works with
Installation
NPM
npx -y mcp-think-toolManual Installation
npx -y mcp-think-toolConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use MCP Think Tool
MCP Think Tool implements Anthropic's Think Tool prompt engineering technique as an MCP server, giving Claude a dedicated reasoning space to work through complex problems before responding. It exposes structured thought-logging capabilities so Claude can break down multi-step tasks, track intermediate reasoning, and review its own thinking process. This is especially useful for coding agents or analytical tasks where chain-of-thought reasoning improves accuracy.
Prerequisites
- Python 3.10+ installed
- pip package manager available
- An MCP-compatible client such as Claude Desktop, Cursor, or Windsurf
- No external API keys required
Install the package via pip
Install mcp-think-tool from PyPI using pip. This installs the server binary to your Python environment's bin directory.
pip install mcp-think-toolLocate the installed binary path
Find the exact path to the installed binary, as you will need it for the client configuration. The path varies by system and Python environment.
which mcp-think-tool
# Example output: /home/user/.local/bin/mcp-think-toolConfigure Claude Desktop
Open your Claude Desktop config file (claude_desktop_config.json) and add an entry pointing to the installed binary. Use the exact path returned by the which command.
Add the server configuration block
Paste the following configuration into the mcpServers section of your claude_desktop_config.json, replacing the path with your actual binary location.
{
"mcpServers": {
"think": {
"command": "/home/user/.local/bin/mcp-think-tool",
"args": []
}
}
}Restart your MCP client
Restart Claude Desktop (or your chosen MCP client) so it picks up the new server configuration. The think tool will appear in the available tools list.
Test the tool
Ask Claude to solve a multi-step problem and observe it using the think tool to reason through the problem before answering. You can also ask Claude to show its thought stats.
MCP Think Tool Examples
Client configuration
Claude Desktop configuration using the installed mcp-think-tool binary. Alternatively, use Docker by replacing command with 'docker' and args with ['run', '--rm', '-i', 'mcp-think-tool'].
{
"mcpServers": {
"think": {
"command": "/home/user/.local/bin/mcp-think-tool",
"args": [],
"type": "stdio"
}
}
}Prompts to try
These prompts encourage Claude to use its structured thinking space before answering.
- "Think through how you would design a rate limiter for a REST API, then implement it in Python."
- "Use your think tool to break down the steps needed to migrate a PostgreSQL database to a new schema without downtime."
- "Think carefully about the edge cases in this algorithm, then show me your thought stats."Troubleshooting MCP Think Tool
Claude Desktop shows 'think' server as failed or unavailable
Double-check the binary path in the config. Run 'which mcp-think-tool' or 'pip show mcp-think-tool' to find the correct path, then update claude_desktop_config.json accordingly.
pip install fails due to Python version incompatibility
Ensure you are running Python 3.10 or higher. Run 'python --version' to check. If needed, use a virtual environment: 'python -m venv .venv && source .venv/bin/activate && pip install mcp-think-tool'.
The think tool appears but Claude does not use it automatically
Explicitly tell Claude to use the think tool in your prompt, e.g. 'Use the think tool to reason through this step by step before answering.' Claude uses tools when instructed or when the task clearly benefits from structured reasoning.
Frequently Asked Questions about MCP Think Tool
What is MCP Think Tool?
MCP Think Tool is a Model Context Protocol (MCP) server that mcp server implementation of anthropic's think tool prompt engineering technique that enables claude to break down complex problems and enhance its reasoning capabilities by providing a simple tool that echoes back thoughts. It connects AI assistants to external tools and data sources through a standardized interface.
How do I install MCP Think Tool?
Install via npm with the command: npx -y mcp-think-tool. Then add the server configuration to your AI client's JSON config file (e.g., claude_desktop_config.json or .cursor/mcp.json).
Which AI clients work with MCP Think Tool?
MCP Think Tool works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is MCP Think Tool free to use?
Yes, MCP Think Tool is open source and available under the MIT License license. You can use it freely in both personal and commercial projects.
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