MCP Server for Structured Reasoning
Give your AI the power of step-by-step reasoning
Thoughtbox is an MCP server that enables LLMs to think methodically through complex problems with branching, revision, and mental models.
Pay-as-you-go pricing at $0.01 per tool call
Everything your AI needs to think better
Step-by-Step Reasoning
Record thoughts one at a time with automatic persistence and chain management.
15 Mental Models
Pre-built cognitive frameworks like Five Whys, Pre-mortem, and Trade-off Matrix.
Code Notebook
Execute JavaScript/TypeScript snippets with full state management.
Real-time Observatory
Visualize reasoning chains as they unfold with our live trace viewer.
Simple, transparent pricing
Pre-paid credits that never expire. No subscriptions.
Starter
$5
500 calls
Popular
Standard
$10
1,000 calls
Pro
$25
2,500 calls
Enterprise
$100
10,000 calls