Businesses
Is this @handle free
Availability for the create-business form. Handles are global and permanent, so this takes no business context — for a second business, your own other handles are taken like anyone else's. Read-only and advisory: the real guarantee is the unique index that createBusiness hits, which is why that operation can still answer 409. Authenticated so it is not an open handle-enumeration endpoint.
get/api/username/check
Query parameters
usernamestring required
The handle to test, without the leading @. Lowercase letters, digits, hyphens and underscores.
Response
Whether the handle is free. NOTE: this operation answers at the top level rather than inside a data envelope.