Logging And Message Event Streaming From Views To Host

Official repo for spec & SDK of MCP Apps protocol - standard for UIs embedded AI chatbots, served by MCP servers

Unique: Provides structured logging via JSON-RPC notifications with severity levels and event data, rather than relying on console.log which may not be visible in sandboxed iframes. One-way notifications reduce latency compared to request-response logging.

vs others: More reliable than console.log because messages are guaranteed to reach the host via the JSON-RPC protocol. More structured than string-based logging because it supports severity levels and arbitrary event data.