# LobbyStack > Help Center and developer documentation for LobbyStack. ## Docs - [Appointment changes](https://docs.lobbystack.com/agent/ai-settings/appointment-changes.md): Let your AI receptionist cancel and reschedule appointments automatically, with confirmation steps that keep you in control. - [Overview](https://docs.lobbystack.com/agent/ai-settings/overview.md): Configure the opening line, default customer language, appointment changes, and default transfer number for your AI receptionist. - [Knowledge](https://docs.lobbystack.com/agent/knowledge.md): Add text, documents, and website content so your receptionist can answer common business questions from accurate source material. - [Overview](https://docs.lobbystack.com/agent/overview.md): Use the Agent section to configure AI settings, knowledge, services, and rules for your receptionist. - [Rules](https://docs.lobbystack.com/agent/rules.md): Use plain text rules to define how your agent should act during calls and conversations. - [Services](https://docs.lobbystack.com/agent/services.md): Add service entries so callers can understand what you offer and ask for the right appointment. - [Plans and billing](https://docs.lobbystack.com/billing/plans.md): Understand LobbyStack plan options: Free, Pro, Enterprise, and self-host. - [Usage and limits](https://docs.lobbystack.com/billing/usage.md): Track voice minutes, SMS segments, outbound call attempts, knowledge storage, and Pro overages. - [Analytics](https://docs.lobbystack.com/dashboard/analytics.md): Review engagement trends across calls, messages, appointments, call outcomes, and communication channels. - [Review calls](https://docs.lobbystack.com/dashboard/calls.md): Use the Calls page to review inbound calls, outcomes, transcripts, recordings, and follow-up tasks. - [Manage contacts](https://docs.lobbystack.com/dashboard/contacts.md): Review caller profiles, interaction history, appointments, blocking status, and SMS consent. - [Home](https://docs.lobbystack.com/dashboard/home.md): Use Home to see what happened recently, what needs attention, and what is coming up next. - [Manage messages](https://docs.lobbystack.com/dashboard/messages.md): Review SMS conversations, send manual replies, attach files, and pause or resume AI automation for a thread. - [Create your account](https://docs.lobbystack.com/getting-started/account-setup.md): Sign up for LobbyStack with an email and password, then update your business name, email address, or password any time from account settings. - [Claim a dedicated phone number for your business](https://docs.lobbystack.com/getting-started/claim-your-number.md): Choose a local or toll-free number that callers dial to reach your LobbyStack AI receptionist, or forward your existing business line to it. - [Connect Google Calendar](https://docs.lobbystack.com/integrations/google-calendar.md): Connect a Google account, choose a writable calendar, and let LobbyStack use it for appointment availability and booking sync. - [Integrations](https://docs.lobbystack.com/integrations/overview.md): Connect your favorite tools to bring bookings, customer context, and follow-ups into LobbyStack. - [SMS, AI replies, and compliance](https://docs.lobbystack.com/integrations/sms.md): Understand the difference between SMS alerts, AI SMS, manual replies, attachments, opt-out handling, and 10DLC setup. - [Introduction](https://docs.lobbystack.com/introduction.md): LobbyStack helps businesses answer calls, capture caller details, book appointments, and follow up from one operator dashboard. - [Quick start](https://docs.lobbystack.com/quickstart.md): Create a LobbyStack account, verify your mobile number, import website knowledge, and claim the phone number your receptionist will answer. - [Environment variables](https://docs.lobbystack.com/self-hosting/environment-variables.md): Key environment variables used by the LobbyStack web app, Convex backend, voice gateway, and optional providers. - [Self-hosting overview](https://docs.lobbystack.com/self-hosting/overview.md): Understand the moving pieces required to run LobbyStack with your own provider accounts. - [Third-party providers](https://docs.lobbystack.com/self-hosting/providers.md): What each external provider does in a self-hosted LobbyStack deployment. - [Settings](https://docs.lobbystack.com/settings/overview.md): Manage usage, billing, team details, account credentials, language, time format, and theme.