Beyond Better Client Inspector

概要

The Beyond Better Client Inspector serves as a dedicated testing platform for MCP clients, filling the critical need for a server-side tool to validate client behavior. Unlike the existing MCP Inspector, which tests servers, this project provides an MCP server environment designed specifically for evaluating how clients handle various protocol interactions. It features a web-based console that allows developers to inspect messages, test LLM completion capabilities, simulate user input requests, and verify notification handling, ensuring robust and compliant client implementations.

主な機能

• Elicitation Testing: Evaluate client handling of user input requests, including structured data.
• Protocol Message Inspection: View all MCP JSON-RPC messages in real-time.
• Inspector Tools: Six utility tools for simulating diverse testing scenarios.
• Notification Testing: Trigger and verify list change notifications to ensure client responsiveness.
• Sampling Testing: Test client LLM completion capabilities with various parameters.
• 1 GitHub stars
• Multi-Client Support: Test multiple MCP clients simultaneously in HTTP mode.

ユースケース

• Validating new MCP client implementations against a controlled server environment.
• Debugging MCP client behavior by inspecting real-time protocol messages.
• Ensuring robust handling of LLM sampling, elicitation requests, and notifications by clients.