Cal.com
Scheduling guidance and agent guardrails.
Cal.com is guidance-only by default; the core does not ship Cal.com UI, OAuth routes, token storage, or account configuration by default.
Agents should read current Cal.com docs before changing event types, slots, bookings, schedules, webhooks, embeds, Atoms, MCP instructions, or API usage.
Use the official Cal.com CLI first. If the CLI is missing or unauthenticated, guide the user through install/auth setup before using direct API calls.
Prefer the hosted MCP server at https://mcp.cal.com/mcp when the user's MCP client supports OAuth.
Use direct API calls only as an explicit fallback when CLI/MCP is unavailable or insufficient, and document why.
Keep Cal.com payments disabled in product code; Polar remains the only billing provider.