Books one open slot at a business served through this connector. Needs a slotId from biz_availability, a service from biz_info, and the first name of the person the appointment is for. It takes a first name and nothing else: no phone number, email address or surname is collected, and there is nowhere to put one. The slot is taken on success, and a second attempt on the same slot is refused with alternatives. Businesses served here: Velvet and Clay (velvetandclay, a hair, color and skin studio), Brightpoint Dental (brightpointdental, a family and cosmetic dental practice). Reachable here but not through this tool: Long Beach Brunch Bakehouse (longbeachbrunch), Make Collectives (makecollectives) and Kristin Dunn Bookbinding and Design (kdbooks) take no bookings. A business that takes no appointments returns an explanation with its hours instead of a booking. For a business whose schedulingSystem is Square, the appointment is written into that business's own Square calendar through the Square Bookings API and the reply carries the Square booking id. When the reply's isDemo is true the business is a demonstration and nothing is reserved in the physical world. The business may be given by name or by id: "Long Beach Brunch Bakehouse" and "longbeachbrunch" both reach the bakery, and a common short form ("the bakehouse", "the brunch house", "the dentist") works too. A name that matches no business served here is refused with the list of businesses that are served, and is not answered about a different one.