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Testing an MCP App means assessing how well it integrates with the host, interacts with the model, and responds to the user. The tools below put these actors in the loop, each trading setup for fidelity.

DevTools

Call tools and render views locally, without a host

Tunnel

Expose your local server to real hosts

Playground

Chat with a real model running your app

Evals

Assert on the tool calls a real model makes

Audit

Catch spec and platform issues before submission