My friend and I built the first open source product analytics SDK for MCP Apps and ChatGPT Apps. Once deployed, you're blind on which tools get called, what fails, where users drop off. Existing tools track page views, not MCP.

Yavio wraps your app at the protocol level and captures everything automatically: const server = withYavio(new McpServer({ name: "my-app", version: "1.0.0" }));

MIT licensed, self-host with Docker. Free cloud coming soon. v0.1.0. Would love feedback.