Check if ONE specific domain (e.g. acme.io) is registrable right now. Use for a single fully-qualified name; to test one word across many extensions, use search_domains instead. Returns an availability verdict, the cheapest registrar and its buy link, the first-year price, and — for taken names — the registration year. Availability is cross-checked against three independent signals (RDAP, DNS-over-HTTPS, Fastly Domain Research); when they disagree or a zone has no reliable RDAP (e.g. .co), the verdict comes back as uncertain rather than guessed — treat uncertain as 'unknown, NOT available', and note that price may be absent for such names.

Check ONE name across MANY TLDs in a single call (e.g. 'acme' → com, io, ai …). Use when comparing extensions for the same word; for a single known domain use check_domain instead. Results are grouped AVAILABLE / TAKEN / UNKNOWN, each carrying cheapest price, buy link, and (for taken names) registration year. Names whose availability cannot be confirmed appear under UNKNOWN and must NOT be treated as available (honest 'unverified' state, never a guess).

Compare what 6 registrars (Namecheap, Cloudflare, Porkbun, GoDaddy, Spaceship, OVHcloud) charge for a given TLD — first-year registration, renewal, and 3-year total — exposing the renewal traps that cheap first-year promos hide. Use for pricing a TLD you already intend to buy; this does NOT check whether a specific domain is free (use check_domain for that). Returns per-registrar rows with buy links, or a notice if no fresh cached pricing exists for that TLD.

Return the registration (creation) year and expiration date of a TAKEN domain, via RDAP. Use to gauge how long a name has been held or when it may expire; it does NOT report availability (use check_domain for that). Returns a 'could not determine' notice for names with no RDAP creation record (some ccTLDs, e.g. .co).