Experiment · MCPinteractive
MCP Visual Explainer
An interactive diagram tool that maps how an MCP server, client, and host communicate. Explore the architecture, the three core primitives (Tools, Resources, Prompts), and a live JSON-RPC 2.0 message trace — all without leaving the browser.
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HOST
Claude
▶
JSON-RPC 2.0◀
⬡
CLIENT
MCP Client
▶
JSON-RPC 2.0◀
◈
SERVER
MCP Server
Database
REST API
File System
Press Run Trace to watch a live MCP request flow step by step.
MCP Spec 2025-11-25 · JSON-RPC 2.0 · stdio / SSE transportOfficial spec ↗