Proving Auth Flows Work Before Code: FetchSandbox's Sandbox-First Approach

Most authentication bugs emerge during the lifecycle phase—session management, webhook handling, state synchronization—not at login. Traditional AI coding agents generate plausible auth code by following documentation, but they can't account for the complex integration requirements that vary per app. FetchSandbox MCP solves this by letting agents run the complete auth workflow in a sandbox environment, inspect real payloads and state transitions, and understand the actual behavior before touching production code.