Official 'GenderAPI.io' V2 client for R. Provides an interface to the 'GenderAPI.io' V2 web service < https://www.genderapi.io/api-documentation> that infers gender from personal names, email addresses and usernames, runs batches of up to 50 items, reads credit usage and validates phone numbers. Responses are returned as parsed lists with all fields kept, including unknown results, confidence metadata, billing status and batch summaries; errors are raised as structured conditions. Requests are never retried and redirects are never followed. Results are inferences, not verified identity, and can be unknown.