{"app":"mail","version":"0.1.0","shared_domain":"agentfirststack.com","docs":"https://mail.agentfirststack.com/llms.txt","mcp":"https://mail.agentfirststack.com/mcp","ui":"https://mail.agentfirststack.com/ui","next_steps":["POST https://mail.agentfirststack.com/v1/signup returns an API key and a ready inbox."]}