Taverity

Return the authenticated user's named contact lists (iOS Contacts groups) with active-member counts. Returns list names and active-member counts only — never phone numbers or other contact details. If two device lists share the same name, their members are counted together. Read-only; no side effects.

Validate a one-time message payload and return the message body and recipients that would be queued. Makes no API call, writes no data, and sends no notifications. For a named list, the response includes the resolved recipient count and names, but no phone numbers.

Queue a one-time text message in the user's Taverity account, to be approved and sent from the user's own iPhone. Each call creates one new pending message; repeated calls create additional pending messages. A dropped-connection transport failure is retried once internally under the same idempotency key, so that retry does not create a duplicate.