Check a list of Domains from GoDaddy to see if they are available by calling their API. The GoDaddy API is limited to 60 requests per second so this script can be slow if you have a lot of domains.

domain-testing.js

/**
 * Follow the docs here - https://developer.godaddy.com/getstarted to get credentials and learn about the Go Daddy Environments.
 */

console.time('domain-testing')

// OTE
// const goDaddyDomain = 'api.ote-godaddy.com'
// const key = ''
// const secret = ''

// PROD
const goDaddyDomain = 'api.godaddy.com'
const key = ''
const secret = ''

const extension = 'io'

const domains = require('./domains.json')
const fetch = require('node-fetch')
const stream = require('stream')

class LookupDomainTransformStream extends stream.Transform {
  constructor (options = {}) {
    super(options)
    // It would be ideal to use response headers from GoDaddy to know how many requests we had remaining, but they
    // don't see to provide this, so we are assuming we can make 1 request for every second that passes (seems to work).
    this.requestLeftPerMinute = 60
    this.interval = setInterval(() => {
      if (this.requestLeftPerMinute < 60) {
        this.requestLeftPerMinute += 1
      }
    }, 1100)
  }

  _transform (domain, encoding, callback) {
    if (!domain) {
      return callback(null, null)
    }

    this.sendRequest(domain)
      .then(response => {
        return response.json()
          .then(body => ({ response, body }))
      })
      .then(({ response, body }) => {
        if (response.status !== 200) {
          console.error(`Non 200 status code received - ${response.status}`, body)
          return callback()
        }

        if (!body.available) {
          return callback(null, `${body.domain} - NOT AVAILABLE\n`)
        }

        callback(null, `${body.domain} - ${(body.price / 1000000).toFixed(2)} ${body.currency}\n`)
      })
      .catch(callback)
  }

  sendRequest (domain) {
    if (this.requestLeftPerMinute > 0) {
      this.requestLeftPerMinute -= 1
      return fetch(`https://${goDaddyDomain}/v1/domains/available?domain=${domain}.${extension}`, {
        headers: { Authorization: `sso-key ${key}:${secret}` }
      })
    }

    return new Promise(resolve => {
      const interval = setInterval(() => {
        if (this.requestLeftPerMinute > 0) {
          clearInterval(interval)
          this.requestLeftPerMinute -= 1
          resolve(fetch(`https://${goDaddyDomain}/v1/domains/available?domain=${domain}.${extension}`, {
            headers: { Authorization: `sso-key ${key}:${secret}` }
          }))
        }
      }, 1000)
    })
  }
}

const lookupDomainTransformStream = new LookupDomainTransformStream()

lookupDomainTransformStream.on('end', () => process.exit())

stream.pipeline(
  stream.Readable.from(domains),
  lookupDomainTransformStream,
  process.stdout,
  (error) => {
    console.timeEnd('domain-testing')
    if (error) {
      console.error('error ', error)
      return process.exit(1)
    }

    process.exit()
  }
)

domains.json

[
  "abecedarian",
  "abracadabra",
  "accoutrements",
  "adagio",
  "aficionado",
  "agita",
  "agog",
  "akimbo",
  "alfresco",
  "aloof",
  "ambrosial",
  "amok",
  "ampersand",
  "anemone",
  "anthropomorphic",
  "antimacassar",
  "aplomb",
  "apogee",
  "apoplectic",
  "appaloosa",
  "apparatus",
  "archipelago",
  "atingle",
  "avuncular",
  "azure",
  "babushka",
  "bailiwick",
  "bafflegab",
  "balderdash",
  "ballistic",
  "bamboozle",
  "bandwagon",
  "barnstorming",
  "beanpole",
  "bedlam",
  "befuddled",
  "bellwether",
  "berserk",
  "bibliopole",
  "bigmouth",
  "bippy",
  "blabbermouth",
  "blatherskite",
  "blindside",
  "blob",
  "blockhead",
  "blowback",
  "blowhard",
  "blubbering",
  "bluestockings",
  "boing",
  "boffo (boffola)",
  "bombastic",
  "bonanza",
  "bonkers",
  "boondocks",
  "boondoggle",
  "borborygmus",
  "bozo",
  "braggadocio",
  "brainstorm",
  "brannigan",
  "breakneck",
  "brouhaha",
  "buckaroo",
  "bucolic",
  "buffoon",
  "bugaboo",
  "bugbear",
  "bulbous",
  "bumbledom",
  "bumfuzzle",
  "bumpkin",
  "bungalow",
  "bunkum",
  "bupkis",
  "burnsides",
  "busybody",
  "cacophony",
  "cahoots",
  "calamity",
  "calliope",
  "candelabra",
  "canoodle",
  "cantankerous",
  "catamaran",
  "catastrophe",
  "catawampus",
  "caterwaul",
  "chatterbox",
  "chichi",
  "chimerical",
  "chimichanga",
  "chitchat",
  "clandestine",
  "claptrap",
  "clishmaclaver",
  "clodhopper",
  "cockamamie",
  "cockatoo",
  "codswallop",
  "collywobbles",
  "colossus",
  "comeuppance",
  "concoction",
  "conniption",
  "contraband",
  "conundrum",
  "convivial",
  "copacetic",
  "corkscrew",
  "cornucopia",
  "cowabunga",
  "coxcomb",
  "crackerjack",
  "crescendo",
  "crestfallen",
  "cryptozoology",
  "cuckoo",
  "curlicue",
  "curmudgeon",
  "demitasse",
  "denouement",
  "desperado",
  "diaphanous",
  "diddly-squat",
  "digeridoo",
  "dilemma",
  "dillydally",
  "dimwit",
  "diphthong",
  "dirigible",
  "discombobulated",
  "dodecahedron",
  "doldrums",
  "donkeyman",
  "donnybrook",
  "doodad",
  "doohickey",
  "doppelganger",
  "dumbfounded",
  "dumbwaiter",
  "dunderhead",
  "earwig",
  "eavesdrop",
  "ebullient",
  "effervescence",
  "egads",
  "eggcorn",
  "egghead",
  "elixir",
  "ephemeral",
  "epiphany",
  "eucatastrophe",
  "extraterrestrial",
  "finagle",
  "fandango",
  "festooned",
  "fez",
  "fiasco",
  "fiddle-footed",
  "fiddlesticks",
  "finicky",
  "firebrand",
  "fishwife",
  "fisticuffs",
  "flabbergasted",
  "flapdoodle",
  "flibbertigibbet",
  "flimflam",
  "flippant",
  "floccinaucinihilipilification",
  "flophouse",
  "flotsam",
  "flummery",
  "flummoxed",
  "flyaway",
  "flyspeck",
  "folderol",
  "foofaraw",
  "foolhardy",
  "foolscap",
  "footloose",
  "fopdoodle",
  "fortuitous",
  "fracas",
  "frangipani",
  "freewheeling",
  "fricassee",
  "frippery",
  "frogman",
  "froufrou",
  "fuddy-duddy",
  "fussbudget",
  "futz",
  "gadfly",
  "gadzooks",
  "gallimaufry",
  "gangplank",
  "gangway",
  "gargoyle",
  "gasbag",
  "gazebo",
  "gazpacho",
  "gewgaw",
  "genteel",
  "ghostwriter",
  "gibberish",
  "gimcrack",
  "gizmo",
  "glabella",
  "glitch",
  "globetrotter",
  "gobbledygook",
  "gobsmacked",
  "goosebump",
  "gooseflesh",
  "gorgonzola",
  "gossamer",
  "grandiloquent",
  "greenhorn",
  "guffaw",
  "gumshoe",
  "guru",
  "gussied",
  "guttersnipe",
  "haberdashery",
  "haboob",
  "hairpin",
  "halcyon",
  "halfwit",
  "hangdog",
  "haphazard",
  "harebrained",
  "harumph",
  "harum-scarum",
  "headlong",
  "heartstrings",
  "heebie-jeebie",
  "heirloom",
  "helter-skelter",
  "hemidemisemiquaver",
  "heyday",
  "higgledy-piggledy",
  "highfalutin",
  "hijinks",
  "hillbilly",
  "hippocampus",
  "hippogriff",
  "hobbledehoy",
  "hobnobbed",
  "hocus-pocus",
  "hodgepodge",
  "hogwash",
  "hokum",
  "hoodoo",
  "hoodwink",
  "hooey",
  "hooligan",
  "hoopla",
  "hootenanny",
  "hornswoggle",
  "horsefeathers",
  "hotbed",
  "hotfoot",
  "hothead",
  "hubbub",
  "hullabaloo",
  "humbug",
  "humdinger",
  "humdrum",
  "hunky-dory",
  "hurly-burly",
  "hushpuppy",
  "huzzah",
  "hyperbole",
  "idiom",
  "idiosyncrasies",
  "igloo",
  "ignoramus",
  "impromptu",
  "incognito",
  "incorrigible",
  "incredulous",
  "indomitable",
  "indubitably",
  "infinitesimal",
  "interloper",
  "interrobang",
  "ironclad",
  "izzard",
  "jabberwocky",
  "jacuzzi",
  "jalopy",
  "jamboree",
  "jargogle",
  "jawbreaker",
  "jetsam",
  "jibber-jabber",
  "jink",
  "jitney",
  "jubilee",
  "juggernaut",
  "jujubes",
  "jumbo",
  "junket",
  "juxtaposition",
  "kaleidoscope",
  "kaput",
  "kerfuffle",
  "kerplunk",
  "kibosh",
  "killjoy",
  "kismet",
  "knickerbocker",
  "knickknack",
  "kowtow",
  "kumquat",
  "kvetch",
  "lackadaisical",
  "lagoon",
  "lambasted",
  "lampoon",
  "landlubber",
  "laughingstock",
  "lexicographer",
  "limburger",
  "lingo",
  "loco",
  "loggerhead",
  "logjam",
  "logophile",
  "logorrhea",
  "lollapalooza",
  "lollygag",
  "loofah",
  "loony",
  "loophole",
  "lugubrious",
  "lummox",
  "machinations",
  "madcap",
  "maelstrom",
  "magnificent",
  "majordomo",
  "malapropism",
  "malarkey",
  "manifesto",
  "mastermind",
  "mayhem",
  "mealymouthed",
  "mellifluous",
  "menagerie",
  "miasma",
  "miffed",
  "milquetoast",
  "misanthrope",
  "mishmash",
  "moocher",
  "mojo",
  "mollycoddle",
  "mondegreen",
  "moniker",
  "monkeyshines",
  "monsoon",
  "mnemonic",
  "moonstruck",
  "muckety-muck",
  "mudpuppy",
  "mudslinger",
  "muffuletta",
  "mufti",
  "mulligatawny",
  "mumbo-jumbo",
  "murmuration",
  "muumuu",
  "nabob",
  "namby-pamby",
  "nimrod",
  "nincompoop",
  "nitwit",
  "nomenclature",
  "nonplussed",
  "noodge",
  "nudnik",
  "numbskull",
  "onomatopoeia",
  "oomph",
  "orotund",
  "outfox",
  "outlandish",
  "oxymoron",
  "pachyderm",
  "pagoda",
  "palindrome",
  "palomino",
  "panache",
  "pandemonium",
  "pantaloons",
  "papyrus",
  "parabola",
  "parallelogram",
  "parapet",
  "paraphernalia",
  "peccadillo",
  "pedagogue",
  "peewee",
  "pell-mell",
  "persimmon",
  "persnickety",
  "pettifogger",
  "phalanx",
  "phantasmagorical",
  "phantonym",
  "phylactery",
  "piffle",
  "pizzazz",
  "plethora",
  "pogo",
  "pogonip",
  "pollex",
  "pollywog",
  "poltroon",
  "pomposity",
  "poppycock",
  "portmanteau",
  "potpourri",
  "pseudonym",
  "pugnacious",
  "pulchritudinous",
  "pusillanimous",
  "pussyfoot",
  "quibble",
  "quicksilver",
  "quicksticks",
  "quiddle",
  "quinzee",
  "quirky",
  "quixotic",
  "quizzity",
  "rabble-rouser",
  "raconteur",
  "rainmaker",
  "ragamuffin",
  "ragtag",
  "ramshackle",
  "ransack",
  "rapscallion",
  "razzle-dazzle",
  "razzmatazz",
  "rejigger",
  "rendezvous",
  "resplendent",
  "rickrack",
  "ricochet",
  "riffraff",
  "rigmarole",
  "riposte",
  "roundabout",
  "roustabout",
  "rubberneck",
  "ruckus",
  "ruffian",
  "rugrat",
  "rumpus",
  "sabayon",
  "sashay",
  "sassafras",
  "scalawag",
  "scatterbrain",
  "schadenfreude",
  "schlep",
  "schluffy",
  "schmooze",
  "schmutz",
  "scintillating",
  "scrofulous",
  "scrumdiddlyumptious",
  "scuttlebutt",
  "serendipity",
  "sesquipedalian",
  "shabang",
  "shenanigans",
  "skedaddle",
  "skirmish",
  "skullduggery",
  "slapdash",
  "slapstick",
  "slipshod",
  "smithereens",
  "smorgasbord",
  "snollygoster",
  "sobriquet",
  "sojourn",
  "spellbind",
  "splendiferous",
  "squeegee",
  "squooshy",
  "staccato",
  "stupefaction",
  "succotash",
  "supercilious",
  "superfluous",
  "surreptitious",
  "Svengali",
  "swashbuckler",
  "switcheroo",
  "swizzlestick",
  "synchronicity",
  "syzygy",
  "talisman",
  "taradiddle",
  "tchotchke",
  "teepee",
  "telekinesis",
  "thingamabob",
  "thingamajig",
  "thunderstruck",
  "tidbit",
  "tintinnabulation",
  "toadstool",
  "toady",
  "tomfoolery",
  "tommyrot",
  "toothsome",
  "topsy-turvy",
  "trapezoid",
  "tub-thumper",
  "tumultuous",
  "typhoon",
  "ululation",
  "umlaut",
  "umpteen",
  "usurp",
  "uvula",
  "vagabond",
  "vamoose",
  "verboten",
  "verisimilitude",
  "vermicious",
  "vertigo",
  "verve",
  "virtuoso",
  "vivacious",
  "vuvuzela",
  "wackadoodle",
  "wallflower",
  "wanderlust",
  "whatchamacallit",
  "whatsis",
  "whimsical",
  "whippersnapper",
  "whirligig",
  "whirlybird",
  "whizbang",
  "whodunit",
  "whoop",
  "widget",
  "wigwam",
  "willy-nilly",
  "windbag",
  "wipeout",
  "wiseacre",
  "wisecrack",
  "wisenheimer",
  "wishy-washy",
  "woebegone",
  "wonky",
  "woozy",
  "wordplay",
  "wordsmith",
  "wunderkind",
  "wuthering",
  "xylophone",
  "yahoo",
  "yokel",
  "yo-yo",
  "zaftig",
  "zeitgeist",
  "zenzizenzizenzic",
  "zephyr",
  "zeppelin",
  "ziggurat",
  "zigzag",
  "zonked",
  "zoom",
  "zydeco"
]