Looking for a domain availability api.

javabro · Feb 3, 2019

I know there aren't any for FREE. I am willing to pay. There are few in the market. I am not sure which of these are good.

whoapi.com ( 6k requests ---- $16/month)
whoisxmlapi.com ( 5k request -- $50)
jsonwhois.io (10k requests - $50)
domainr.com (10k requests $20)

Domain sellers @BHW, I am not a competitor.

This is for my personal use only. Please suggest me a good one without any false positives.

Thank You.

graham25s · Feb 3, 2019

Scrapebox can check for unregistered domains, a one off fee, unless you want to code it into a bigger system?

Ah i see you want an api, if you can code make an .xml like:

<WhoisServerDefinition>
<name>whois.nic.us</name>
<address>whois.nic.us</address>
<freeResponse>not found: $domain$</freeResponse>
<tld>us</tld>
</WhoisServerDefinition>

Of all the extensions you want to check, connect via TCP Socket: whois.nic.us if you get a: not found: $domain$ flag it's free to register, the same for all extensions really, this will save you api fees longterm.

javabro · Feb 3, 2019

graham25s said:
Scrapebox can check for unregistered domains, a one off fee, unless you want to code it into a bigger system?

It has a ton of false positives.

graham25s · Feb 3, 2019

I put a delay of 60 seconds when it finds a free domain, if the proxies get hit too fast / hard thats when the false positives show up

javabro · Feb 3, 2019

graham25s said:
Ah i see you want an api, if you can code make an .xml like:

<WhoisServerDefinition>
<name>whois.nic.us</name>
<address>whois.nic.us</address>
<freeResponse>not found: $domain$</freeResponse>
<tld>us</tld>
</WhoisServerDefinition>

Of all the extensions you weant to check, connect via TCP Socket: whois.nic.us if you get a: not found: $domain$ flag it's free to register, the same for all extensions really, this will save you api fees longterm.

I want to go bulk. like 5k checks a day

I can't do that with this method. It hangs quite often.

HydroxZ · Feb 3, 2019

How do you check if a domain is available or not? I have no knowledge about domains etc but I could help if I know how

javabro · Feb 3, 2019

HydroxZ said:
How do you check if a domain is available or not? I have no knowledge about domains etc but I could help if I know how

Whois check is the way to go, if I am correct. Connecting a couple whois server is okay for few programmatic domain checks, but not for bulk. those servers have limitations to prevent whois abuse. That's why I am looking for an API. To lift the hard work for me.

graham25s · Feb 3, 2019

I do checking every few days, i don't use proxies, just either crawl a whole site or load in a list of pages to check, 5k is easily done

i use single threads on purpose, when it hits a "free to register" domain, it pauses 60 seconds (this delay is important, it gives the servers some rest time so they are not getting hammered

) once it finds a domain free, it's sent to a .php script which checks the metrics via this api: https://seo-rank.my-addr.com/ i then extract any backlinks using the free moz api and the pais seokicks api.

I have found some great domains this way

hope that helps.

regards

graham25s · Feb 3, 2019

You need to use a whois server list:

Code:

<?xml version="1.0" encoding="UTF-8" ?>
<WhoisServerList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="whois-server-list.xsd">

  <WhoisServerDefinition>
    <name>whois.internic.net</name>
    <address>whois.internic.net</address>
    <freeResponse>no match for "$domain$".</freeResponse>
    <tld>com</tld>
    <tld>net</tld>
    <tld>edu</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.publicinterestregistry.net</name>
    <address>whois.publicinterestregistry.net</address>
    <freeResponse>not found</freeResponse>
    <tld>org</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.afilias.info</name>
    <address>whois.afilias.info</address>
    <freeResponse>not found</freeResponse>
    <tld>info</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.neulevel.biz</name>
    <address>whois.neulevel.biz</address>
    <freeResponse>not found: $domain$</freeResponse>
    <tld>biz</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.nic.us</name>
    <address>whois.nic.us</address>
    <freeResponse>not found: $domain$</freeResponse>
    <tld>us</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.nic.uk</name>
    <address>whois.nic.uk</address>
    <freeResponse>no match for "$domain$".</freeResponse>
    <tld>uk</tld>
    <tld>co.uk</tld>
    <tld>org.uk</tld>
    <tld>ltd.uk</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.cira.ca</name>
    <address>whois.cira.ca</address>
    <freeResponse>status:         avail</freeResponse>
    <tld>ca</tld>
    <tld>ab.ca</tld>
    <tld>bc.ca</tld>
    <tld>mb.ca</tld>
    <tld>nb.ca</tld>
    <tld>nf.ca</tld>
    <tld>nl.ca</tld>
    <tld>ns.ca</tld>
    <tld>nt.ca</tld>
    <tld>nu.ca</tld>
    <tld>on.ca</tld>
    <tld>pe.ca</tld>
    <tld>qc.ca</tld>
    <tld>sk.ca</tld>
    <tld>yk.ca</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.domainregistry.ie</name>
    <address>whois.domainregistry.ie</address>
    <freeResponse>not registered -</freeResponse>
    <tld>ie</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.nic.it</name>
    <address>whois.nic.it</address>
    <freeResponse>Status:             AVAILABLE</freeResponse>
    <tld>it</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.eu</name>
    <address>whois.eu</address>
    <freeResponse>Status:   AVAILABLE</freeResponse>
    <tld>eu</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.nic.name</name>
    <address>whois.nic.name</address>
    <freeResponse>No match for "$domain$".</freeResponse>
    <tld>name</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.aunic.net</name>
    <address>whois.aunic.net</address>
    <freeResponse>no data found</freeResponse>
    <tld>au</tld>
    <tld>net.au</tld>
    <tld>com.au</tld>
    <tld>org.au</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.denic.de</name>
    <address>whois.denic.de</address>
    <freeResponse>Status: free</freeResponse>
    <tld>de</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.dotmobiregistry.net</name>
    <address>whois.dotmobiregistry.net</address>
    <freeResponse>not found</freeResponse>
    <tld>mobi</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.inregistry.net</name>
    <address>whois.inregistry.net</address>
    <freeResponse>not found</freeResponse>
    <tld>in</tld>
    <tld>co.in</tld>
    <tld>net.in</tld>
    <tld>org.in</tld>
    <tld>firm.in</tld>
    <tld>gen.in</tld>
    <tld>ind.in</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.domain-registry.nl</name>
    <address>whois.domain-registry.nl</address>
    <freeResponse>$domain$ is free</freeResponse>
    <tld>nl</tld>
    <tld>co.nl</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.srs.net.nz</name>
    <address>whois.srs.net.nz</address>
    <freeResponse>query_status: 220 available</freeResponse>
    <tld>nz</tld>
    <tld>ac.nz</tld>
    <tld>co.nz</tld>
    <tld>cri.nz</tld>
    <tld>cri.nz</tld>
    <tld>geek.nz</tld>
    <tld>gen.nz</tld>
    <tld>govt.nz</tld>
    <tld>iwi.nz</tld>
    <tld>maori.nz</tld>
    <tld>mil.nz</tld>
    <tld>net.nz</tld>
    <tld>org.nz</tld>
    <tld>parliament.nz</tld>
    <tld>school.nz</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.nic.mx</name>
    <address>whois.nic.mx</address>
    <freeResponse>No_Se_Encontro_El_Objeto</freeResponse>
    <tld>mx</tld>
    <tld>com.mx</tld>
    <tld>edu.mx</tld>
    <tld>gob.mx</tld>
    <tld>net.mx</tld>
    <tld>org.mx</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.nic.br</name>
    <address>whois.nic.br</address>
    <freeResponse>no match for domain "$domain$"</freeResponse>
    <tld>br</tld>
    <tld>com.br</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.belizenic.bz</name>
    <address>whois.belizenic.bz</address>
    <freeResponse>no match for "$domain$"</freeResponse>
    <tld>bz</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.nic.pr</name>
    <address>whois.nic.pr</address>
    <freeResponse>The domain $domain$ is not registered.</freeResponse>
    <tld>pr</tld>
  </WhoisServerDefinition>

  <WhoisServerDefinition>
    <name>whois.afnic.fr</name>
    <address>whois.afnic.fr</address>
    <freeResponse>No entries found in the AFNIC Database.</freeResponse>
    <tld>fr</tld>
  </WhoisServerDefinition>
 
  <WhoisServerDefinition>
    <name>whois.dns.pl</name>
    <address>whois.dns.pl</address>
    <freeResponse>No information available</freeResponse>
    <tld>com.pl</tld>
    <tld>pl</tld>
  </WhoisServerDefinition>

</WhoisServerList>

This can be updated via scrapebox's list and vice versa

javabro · Feb 3, 2019

graham25s said:
I do checking every few days, i don't use proxies, just either crawl a whole site or load in a list of pages to check, 5k is easily done i use single threads on purpose, when it hits a "free to register" domain, it pauses 60 seconds (this delay is important, it gives the servers some rest time so they are not getting hammered ) once it finds a domain free, it's sent to a .php script which checks the metrics via this api: https://seo-rank.my-addr.com/ i then extract any backlinks using the free moz api and the pais seokicks api.

I have found some great domains this way hope that helps.

regards

I am doing exactly the same thing..minus the seokicks part... lol.

graham25s · Feb 3, 2019

lol great minds

another thing i do is check sites in google from 2000 - 2008-ish, with queries like "inurl:links.php","inurl:links.htm" lots of old nuggets found this way

you can rebuild the domain automatically from wayback or start fresh

javabro · Feb 3, 2019

graham25s said:
lol great minds another thing i do is check sites in google from 2000 - 2008-ish, with queries like "inurl:links.php","inurl:links.htm" lots of old nuggets found this way you can rebuild the domain automatically from wayback or start fresh

Thanks mate, I'll give it another shot with rotating whois servers

and giving 60s breaks.

javabro · Feb 3, 2019

Code:

$servers = array(
    "whois.godaddy.com",
    "whois.networksolutions.com",
    "whois.enom.com",
    "whois.name.com",
    "whois.tucows.com",
    "whois.PublicDomainRegistry.com",
    "whois.register.com",
    "whois.wildwestdomains.com",
    "whois.markmonitor.com",           
    "whois2.softlayer.com",
    "whois2.domain.com",
    "whois.zoomregistrar.com",
    "whois.zonecasting.com",
    "whois.zigzagnames.com",
    "whois.yovole.com",       
    "whois.yournamemonkey.com",
    "whois.yourjungle.com",
    "whois.yourjungle.com",
    "whois.yourdomainnameregistrar.com",       
    "whois.yourdomainking.com",
    "whois.your-server.de",
    "whois.youdamain.com",
    "whois.yesnic.com",       
    "whois.yellowstart.com",
    "whois.worthydomains.com",
    "whois.worldbizdomains.com",
    "whois.world4you.com",
    "whois.willamettenames.com",
    "whois.whatisyourdomain.com",
    "whois.west263.com",
    "whois.welcomedomain.com",
    "whois.webzero.com",
    "whois.websitesource.com",
    "whois.website.ws",       
    "whois.webnic.cc",       
    "whois.webnames.ru",
    "whois.webnames.ca",
    "whois.webmasters.com",
    "whois.webhosting24.com",
    "whois.webbusiness.biz",
    "whois.webair.com",       
    "whois.web4africa.net",
    "whois.volusion.com",
    "whois.vividdomains.com",
    "whois.visualnames.com",
    "whois.virtualregistrar.com",
    "whois.vigson.com",       
    "whois.viennaweb.at",
    "whois.viaduc.fr",       
    "whois.vertexnames.com",
    "whois.vedacore.com",
    "whois.unpower.com",
    "whois.unifiedservers.com",
    "whois.ultraregistrar.com",
    "whois.ukrnames.com",
    "whois.udomainname.com",
    "whois.udomainname.com",
    "whois.udamain.com",
    "whois.udag.net",       
    "whois.twt.it",               
    "whois.turbosite.com.br",
    "whois.ttpia.com",       
    "whois.tropicregistry.com",
    "whois.traveldomainsincorporated.com",       
    "whois.transip.net",
    "whois.trafficnames.net",
    "whois.trafficmedia.com",
    "whois.tradestarter.com",
    "whois.tradenamed.com",
    "whois.tradeindia.com",
    "whois.tppinternet.com",
    "whois.totalregistrations.com",
    "whois.totallydomain.com",
    "whois.topsystem.com",
    "whois.toglodo.com",
    "whois.todaynic.com",
    "whois.titanichosting.com",
    "whois.tigertech.net",
    "whois.threadwise.com",
    "whois.threadwatch.com",
    "whois.threadwalker.com",
    "whois.threadagent.com",
    "whois.thirdfloordns.com",
    "whois.theregistrarservice.com",               
    "whois.thenameco.com",
    "whois.techtyrants.com",
    "whois.tagidomains.com",
    "whois.syra.com.au",
    "whois.svenskadomaner.se",
    "whois.supernameworld.com",
    "whois.subreg.cz",       
    "whois.star-domain.jp",
    "whois.sssasss.com",
    "whois.ssandomain.com",
    "whois.soyouwantadomain.com",
    "whois.softlayer.com",
    "whois.snoqulamiedomains.com",
    "whois.snappyregistrar.com",
    "whois.skykomishdomains.com",
    "whois.sitefrenzy.com",
    "whois.sipence.com",
    "whois.silverbackdomains.com",
    "whois.signdomains.com",
    "whois.sicherregister.com",
    "whois.sibername.com",
    "whois.sfn.cn",               
    "whois.seymourdomains.com",
    "whois.serverplan.com",
    "whois.secura-gmbh.de",
    "whois.searchnresq.com",
    "whois.searchname.ca",
    "whois.sdsns.com",       
    "whois.sbsnames.com",
    "whois.savethename.com",
    "whois.savemorenames.com",
    "whois.santiamdomains.com",
    "whois.sammamishdomains.com",
    "whois.safenames.net",
    "whois.rrpproxy.net",
    "whois.rockenstein.de",
    "whois.riktad.se",       
    "whois.ride-domain.com",
    "whois.rethemhosting.net",
    "whois.resellserv.com",
    "whois.resellerid.com",
    "whois.resellercamp.com",
    "whois.registrygate.com",
    "whois.registrationtek.com",
    "whois.registrar.telekom.de",
    "whois.registrar.eu",
    "whois.registrar-info.eu",
    "whois.registermatrix.com",
    "whois.register4less.com",
    "whois.register.it",
    "whois.register.eu",
    "whois.register.ca",
    "whois.reg2c.com",       
    "whois.reg.ru",               
    "whois.reclaimdomains.com",
    "whois.rebel.com",       
    "whois.rankusa.com",
    "whois.rainydaydomains.com",
    "whois.r01.ru",               
    "whois.puritynames.com",
    "whois.purenic.com",
    "whois.puredomain.com",
    "whois.psi-usa.info",
    "whois.protondomains.com",
    "whois.pronamed.com",
    "whois.profilebuilder.com",
    "whois.prodomaines.com",
    "whois.privatedomains.biz",       
    "whois.premiumregistrations.com",       
    "whois.powernamers.com",       
    "whois.powercarrier.com",       
    "whois.powerbrandsolutions.com",       
    "whois.postaldomains.com",       
    "whois.platinumregistrar.com",       
    "whois.planetdomain.com",       
    "whois.pheenix.com",       
    "whois.pearlnamingservice.com",       
    "whois.pdxprivatenames.com",       
    "whois.paycenter.com.cn",       
    "whois.pavietnam.vn",       
    "whois.pananames.com",       
    "whois.paknic.com",       
    "whois.pairnic.com",       
    "whois.pacnames.com",       
    "whois.ownregistrar.com",       
    "whois.ownidentity.com",       
    "whois.ourdomains.com",       
    "whois.oregonurls.com",       
    "whois.oregoneu.com",       
    "whois.oray.com",       
    "whois.openname.com",       
    "whois.onlinenic.com",       
    "whois.omnis.com",       
    "whois.oldworldaliases.com",       
    "whois.oldtowndomains.com",       
    "whois.octopusdomains.net",       
    "whois.notsofamousnames.com",       
    "whois.noticeddomains.com",       
    "whois.nordreg.com",       
    "whois.nominfinitum.com",       
    "whois.nominate.net",       
    "whois.nominalia.com",       
    "whois.nomer.com",       
    "whois.no-ip.com",       
    "whois.nictrade.se",       
    "whois.nicreg.com",       
    "whois.nic.ru",       
    "whois.newgreatdomains.com",       
    "whois.neudomain.com",       
    "whois.networksavior.com",       
    "whois.networking4all.com",       
    "whois.nettica.com",       
    "whois.netsavers.com",       
    "whois.netregistry.net",       
    "whois.netlogistics.com.au",       
    "whois.netjuggler.com",       
    "whois.netim.com",       
    "whois.netestate.com",       
    "whois.netdorm.com",       
    "whois.netbulk.com",       
    "whois.netart-registrar.com",       
    "whois.net4domains.com",       
    "whois.net-chinese.com.tw",       
    "whois.nerdnames.com",       
    "whois.neonic.com",       
    "whois.neen.it",       
    "whois.needservers.com",       
    "whois.nayana.com",       
    "whois.nawang.cn",       
    "whois.namware.com",       
    "whois.namevolcano.com",       
    "whois.namevault.com",       
    "whois.nameturn.com",       
    "whois.nametofame.com",       
    "whois.namethread.com",       
    "whois.nametell.com",       
    "whois.namesystem.com",       
    "whois.namestream.com",       
    "whois.namestrategies.com",       
    "whois.namesinmotion.com",       
    "whois.namesilo.com",       
    "whois.nameshere.com",       
    "whois.namesector.com",       
    "whois.namescout.com",       
    "whois.namescout.com",       
    "whois.namesbeyond.com",       
    "whois.namesay.com",       
    "whois.namesalacarte.com",       
    "whois.names4ever.com",       
    "whois.namerich.cn",       
    "whois.nameperfections.com",       
    "whois.namepanther.com",       
    "whois.namenelly.com",       
    "whois.namemax.cn",       
    "whois.nameling.com",       
    "whois.nameking.com",       
    "whois.namejolt.com",       
    "whois.namefull.com",       
    "whois.nameforward.com",       
    "whois.namefinger.com",       
    "whois.nameescape.com",       
    "whois.nameemperor.com",       
    "whois.namecroc.com",       
    "whois.namechild.com",       
    "whois.namecheap.com",       
    "whois.namebright.com",       
    "whois.namebrew.com",       
    "whois.namebake.com",       
    "whois.namearsenal.com",       
    "whois.mypreciousdomain.com",       
    "whois.myorderbox.com",       
    "whois.myorderbox.com",       
    "whois.myobnet.com",       
    "whois.mvpdomainnames.com",       
    "whois.moniker.com",       
    "whois.mobilenameservices.com",       
    "whois.misternic.com",       
    "whois.misk.com",       
    "whois.mijninternetoplossing.nl",       
    "whois.microbreweddomains.com",       
    "whois.meshdigital.com",       
    "whois.matbao.net",       
    "whois.masterofmydomains.net",       
    "whois.markbark.com",       
    "whois.maprilis.com.vn",       
    "whois.mailclub.net",       
    "whois.magicfriday.com",       
    "whois.lws.fr",       
    "whois.locaweb.com.br",       
    "whois.litedomains.com",       
    "whois.liquidnetlimited.com",       
    "whois.lexsynergy.com",       
    "whois.lemonregistry.com",       
    "whois.ledl.net",       
    "whois.lcn.com",       
    "whois.lakeodomains.com",       
    "whois.ladasdomains.com",       
    "whois.kuwaitnet.net",       
    "whois.kudo.com",       
    "whois.ksdom.kr",       
    "whois.komplex.net",       
    "whois.klaatudomains.com",       
    "whois.king-domains.com",       
    "whois.keyregistrar.com",       
    "whois.k8.com.br",       
    "whois.jungbo.net",       
    "whois.jprs.jp",       
    "whois.joker.com",       
    "whois.joinup.jp",       
    "whois.jetpackdomains.com",       
    "whois.itpan.com",       
    "whois.isregistrar.com",       
    "whois.isimtescil.net",       
    "whois.iserveyourdomain.com",       
    "whois.iregistry.com",       
    "whois.ireg.net",       
    "whois.ipxcess.com",       
    "whois.ipmirror.com",       
    "whois.intrustdomains.com",       
    "whois.internetworks.com",       
    "whois.internetters.co.uk",       
    "whois.internetdomainnameregistrar.org",       
    "whois.internet.bs",       
    "whois.interlakenames.com",       
    "whois.interdominios.com",       
    "whois.interdomain.net",       
    "whois.instinctsolutions.com",       
    "whois.instantnames.com",       
    "whois.insanenames.com",       
    "whois.initialesonline.net",       
    "whois.ininaf.com",       
    "whois.inic.ch",       
    "whois.indiatimes.com",       
    "whois.inames.co.kr",       
    "whois.imminentdomains.net",       
    "whois.imena.ua",       
    "whois.ilait.com",       
    "whois.iisp.com",       
    "whois.ihs.com.tr",       
    "whois.idindi.com",       
    "whois.idgenesis.com",       
    "whois.ibi.net",       
    "whois.iaregistry.com",       
    "whois.hyperstreet.com",       
    "whois.hupo.com",       
    "whois.http.net",       
    "whois.hotdomaintrade.com",       
    "whois.hostway.com",       
    "whois.hostingservicesinc.net",       
    "whois.hostinger.com",       
    "whois.hosting.kr",       
    "whois.hoapdi-inc.com",       
    "whois.hichina.com",       
    "whois.hectamedia.com",       
    "whois.heavydomains.net",       
    "whois.hawthornedomains.com",       
    "whois.haveaname.com",       
    "whois.gzidc.com",       
    "whois.guoxuwang.cn",       
    "whois.gungagalunga.biz",       
    "whois.groundinternet.com",       
    "whois.gradeadomainnames.com",       
    "whois.gozerdomains.com",       
    "whois.goserveyourdomain.com",       
    "whois.google.com",       
    "whois.gooddomainregistry.com",       
    "whois.gonbei.jp",       
    "whois.gomontenegrodomains.com",       
    "whois.gofullhouse.com",       
    "whois.gofrancedomains.com",       
    "whois.godomaingo.com",       
    "whois.gochinadomains.com",       
    "whois.gocanadadomains.com",       
    "whois.goaustraliadomains.com",       
    "whois.glis.in",       
    "whois.glamdomains.com",       
    "whois.gkg.net",       
    "whois.ghana.com",       
    "whois.getyername.com",       
    "whois.genious.net",       
    "whois.gatekeeperdomains.net",       
    "whois.gandi.net",       
    "whois.gamefornames.com",       
    "whois.gabia.com",       
    "whois.fushitarazu.com",       
    "whois.frontstreetdomains.com",       
    "whois.freshbreweddomains.com",       
    "whois.freeparking.co.uk",       
    "whois.flancrestdomains.com",       
    "whois.findyouaname.com",       
    "whois.findyouadomain.com",       
    "whois.finduaname.com",       
    "whois.findgooddomains.com",       
    "whois.fiducia.lv",       
    "whois.fenominal.com",       
    "whois.fabulous.com",       
    "whois.extrathreads.com",       
    "whois.extranetdeclientes.com",       
    "whois.extendnames.com",       
    "whois.experinom.com",       
    "whois.exai.com",       
    "whois.evonames.com",       
    "whois.everreadynames.com",       
    "whois.euturbo.com",       
    "whois.eurotrashnames.com",       
    "whois.europeanconnectiononline.com",       
    "whois.eurodns.com",       
    "whois.eunameflood.com",       
    "whois.epik.com",       
    "whois.entorno.es",       
    "whois.entertainmentnames.com",       
    "whois.enterprice.net",       
    "whois.enomx.com",       
    "whois.enomworld.com",       
    "whois.enomv.com",       
    "whois.enomtoo.com",       
    "whois.enomten.com",       
    "whois.enomnz.com",       
    "whois.enomgmpservices.com",       
    "whois.enomfor.com",       
    "whois.enomeu.com",       
    "whois.enomcorporate.com",       
    "whois.enombre.com",       
    "whois.enomate.com",       
    "whois.enoma1.com",       
    "whois.enom5.com",       
    "whois.enom469.com",       
    "whois.enom467.com",       
    "whois.enom463.com",       
    "whois.enom459.com",       
    "whois.enom457.com",       
    "whois.enom455.com",       
    "whois.enom453.com",       
    "whois.enom451.com",       
    "whois.enom449.com",       
    "whois.enom447.com",       
    "whois.enom445.com",       
    "whois.enom443.com",       
    "whois.enom441.com",       
    "whois.enom439.com",       
    "whois.enom437.com",       
    "whois.enom435.com",       
    "whois.enom433.com",       
    "whois.enom431.com",       
    "whois.enom429.com",       
    "whois.enom427.com",       
    "whois.enom425.com",       
    "whois.enom423.com",       
    "whois.enom421.com",       
    "whois.enom419.com",       
    "whois.enom417.com",       
    "whois.enom413.com",       
    "whois.enom411.com",       
    "whois.enom409.com",       
    "whois.enom407.com",       
    "whois.enom405.com",       
    "whois.enom403.com",       
    "whois.enom4.com",       
    "whois.enom399.com",       
    "whois.enom397.com",       
    "whois.enom395.com",       
    "whois.enom391.com",       
    "whois.enom389.com",       
    "whois.enom387.com",       
    "whois.enom381.com",       
    "whois.enom379.com",       
    "whois.enom377.com",       
    "whois.enom375.com",       
    "whois.enom373.com",       
    "whois.enom371.com",       
    "whois.enom3.com",       
    "whois.enom2.com",       
    "whois.enom1.com",       
    "whois.enetica.com.au",       
    "whois.encirca.com",       
    "whois.ename.com",       
    "whois.echodomain.com",       
    "whois.ebrandsecure.com",       
    "whois.easyspace.com",       
    "whois.eastnames.com",       
    "whois.eachnic.com",       
    "whois.eNom461.com",       
    "whois.eNom415.com",       
    "whois.eNom393.com",       
    "whois.eNom385.com",       
    "whois.eNom383.com",       
    "whois.dyndns.com",       
    "whois.dynanames.com",       
    "whois.dynamicdolphin.com",       
    "whois.dynadot5.com",       
    "whois.dynadot4.com",       
    "whois.dynadot3.com",       
    "whois.dynadot2.com",       
    "whois.dynadot1.com",       
    "whois.dynadot0.com",       
    "whois.dynadot.com",       
    "whois.duckbilleddomains.com",       
    "whois.dropoutlet.com",       
    "whois.dotroll.com",       
    "whois.dotnamed.com",       
    "whois.dotname.co.kr",       
    "whois.dotdomainsale.com",       
    "whois.dotarai.com",       
    "whois.dotalliance.com",       
    "whois.domus-llc.com",       
    "whois.domrobot.com",       
    "whois.domerati.com",       
    "whois.domdrill.com",       
    "whois.domainz.com",       
    "whois.domainyeti.com",       
    "whois.domainwards.com",       
    "whois.domaintimemachine.com",       
    "whois.domaintact.com",       
    "whois.domainsurgeon.com",       
    "whois.domainstreetdirect.com",       
    "whois.domainsrs.com",       
    "whois.domainsprouts.com",       
    "whois.domainsovereigns.com",       
    "whois.domainsoverboard.com",       
    "whois.domainsouffle.com",       
    "whois.domainsonly.com",       
    "whois.domainsofvalue.com",       
    "whois.domainsoftheworld.net",       
    "whois.domainsoftheday.net",       
    "whois.domainsofcourse.com",       
    "whois.domainsinthebag.com",       
    "whois.domainshype.com",       
    "whois.domainsareforever.net",       
    "whois.domainsalsa.com",       
    "whois.domainsails.net",       
    "whois.domains.domreg.lt",       
    "whois.domains.co.za",       
    "whois.domainroyale.com",       
    "whois.domainregi.com",       
    "whois.domainraker.net",       
    "whois.domainprocessor.com",       
    "whois.domainprime.com",       
    "whois.domainpicking.com",       
    "whois.domainpeople.com",       
    "whois.domainparkblock.com",       
    "whois.domainnovations.com",       
    "whois.domainnameshop.com",       
    "whois.domainname.com",       
    "whois.domainmonster.com",       
    "whois.domainmap.com",       
    "whois.domainlocal.com",       
    "whois.domainladder.com",       
    "whois.domainjungle.net",       
    "whois.domaininthehole.com",       
    "whois.domaininthebasket.com",       
    "whois.domainhysteria.com",       
    "whois.domainhood.com",       
    "whois.domainhawks.net",       
    "whois.domaingetter.com",       
    "whois.domaingazelle.com",       
    "whois.domainfalcon.com",       
    "whois.domainextreme.com",       
    "whois.domaindiscover.com",       
    "whois.domaindelights.com",       
    "whois.domaincritics.com",       
    "whois.domaincreek.com",       
    "whois.domaincraze.com",       
    "whois.domaincontext.com",       
    "whois.domaincomesaround.com",       
    "whois.domainclub.com",       
    "whois.domainclip.com",       
    "whois.domaincentre.ca",       
    "whois.domaincapitan.com",       
    "whois.domainarmada.com",       
    "whois.domainamania.com",       
    "whois.domainallies.com",       
    "whois.domainahead.com",       
    "whois.domainagent.co.nz",       
    "whois.domain2.com",       
    "whois.domain.com",       
    "whois.documentdata.li",       
    "whois.do-reg.jp",       
    "whois.dns.com.cn",       
    "whois.dm3networks.com",       
    "whois.division120.com",       
    "whois.distributeit.com.au",       
    "whois.discountdomainsuk.com",       
    "whois.discount-domain.com",       
    "whois.directnic.com",       
    "whois.dfordomains.com",       
    "whois.desertdevil.com",       
    "whois.deschutesdomains.com",       
    "whois.demys.com",       
    "whois.dattatec.com",       
    "whois.dandomain.dk",       
    "whois.dagnabit.biz",       
    "whois.curiousnet.com",       
    "whois.crystalcoal.com",       
    "whois.cronon.net",       
    "whois.crispnames.com",       
    "whois.cps-datensysteme.de",       
    "whois.corporatedomains.com",       
    "whois.corenic.net",       
    "whois.coolocean.com",       
    "whois.compuglobalhypermega.com",       
    "whois.communigal.net",       
    "whois.commerceisland.com",       
    "whois.comfydomains.com",       
    "whois.columbianames.com",       
    "whois.cnolnic.com",       
    "whois.cndns.com",       
    "whois.cn.hooyoo.com",       
    "whois.clouddomainregistry.com",       
    "whois.cheapies.com",       
    "whois.cdmon.com",       
    "whois.ccireg.com",       
    "whois.ccdomain.co.kr",       
    "whois.burnsidedomains.com",       
    "whois.bullrundomains.com",       
    "whois.bottledomains.com",       
    "whois.boterosolutions.net",       
    "whois.bookmyname.com",       
    "whois.bluerazor.com",       
    "whois.bluefractal.com",       
    "whois.blockhost.com",       
    "whois.blisternet.net",       
    "whois.blastdomains.com",       
    "whois.blacknight.com",       
    "whois.bizcn.com",       
    "whois.binero.se",       
    "whois.biglizarddomains.com",       
    "whois.bighouseservices.com",       
    "whois.bigdomainshop.com",       
    "whois.betterthanaveragedomains.com",       
    "whois.belmontdomains.com",       
    "whois.beartrapdomains.com",       
    "whois.batdomains.com",       
    "whois.basicfusion.com",       
    "whois.baronofdomains.com",       
    "whois.badger.com",       
    "whois.backslapdomains.com",       
    "whois.azprivatez.com",       
    "whois.azdomainz.com",       
    "whois.az.pl",       
    "whois.aviddomain.com",       
    "whois.ausregistryinternational.com",       
    "whois.atozdomainsmarket.com",       
    "whois.atomicdomainnames.com",       
    "whois.atlanticfriendnames.com",       
    "whois.astutium.com",       
    "whois.assorted.com",       
    "whois.asiaregister.com",       
    "whois.asiadomains.biz",       
    "whois.asadal.com",       
    "whois.aruba.it",       
    "whois.arcticnames.com",       
    "whois.arabinternetnames.com",       
    "whois.antagus.de",       
    "whois.anchovy.com",       
    "whois.alpinedomains.com",       
    "whois.allworldnames.com",       
    "whois.allglobalnames.com",       
    "whois.allearthdomains.com",
    "whois.alfena.com",       
    "whois.aitdomains.com",
    "whois.afternic.com",
    "whois.afterdarkdomainsincorporated.com",
    "whois.afriregister.com",
    "whois.aerotek.com.tr",
    "whois.advancedregistrar.com",
    "whois.adomainofyourown.com",
    "whois.activeregistrar.com",
    "whois.active24.com",
    "whois.acquirednames.com",
    "whois.accentdomains.com",
    "whois.above.com",       
    "whois.aboutdomainsolutions.com",               
    "whois.PresidentialDomains.com",               
    "whois.NameWeb.biz",
    "whois.LTNIC.com",       
    "whois.72dns.com",       
    "whois.625domains.com",
    "whois.55hl.com",       
    "whois.51hkidc.com",
    "whois.35.com",               
    "whois.2imagen.net",
    "whois.22.cn",               
    "whois.1isi.com",       
    "whois.1hostkorea.com",
    "whois.1hostjapan.com",
    "whois.1hostgermany.com",
    "whois.1hostchina.com",
    "whois.1hostcanada.com",
    "whois.1hostaustralia.com",
    "whois.123-reg.co.uk",
    "whois.101domain.com",
    "whois.0101domain.com",
    "whois.007names.com",
    "rcube.ipmirror.com/rblWhois.do",               
    "nswhois.domainregistry.com",
    "kheweul.org",               
    "grs-whois.hichina.com",
    "comnet-whois.humeia.com",
    "Whois.gabia.com",       
    "Whois.bigrock.com",
    "Whois.bigrock.com",
    "Whois.Registrar.Amazon.com",
);

Damn,
For anyone coming back to this thread.

whiteroot · Feb 3, 2019

I use Name .com api (it's free)
example response for "renegade" second level domain search:

{"results": [
{"domainName":"renegade.be","sld":"renegade","tld":"be"},
{"domainName":"renegade.biz","sld":"renegade","tld":"biz"},
{"domainName":"renegade.ca","sld":"renegade","tld":"ca","purchasable":true,"premium":true,"purchasePrice":31395,"purchaseType":"aftermarket_s","renewalPrice":12.99},
{"domainName":"renegade.cc","sld":"renegade","tld":"cc"},
{"domainName":"renegade.ch","sld":"renegade","tld":"ch"},
{"domainName":"renegade.co","sld":"renegade","tld":"co"},
{"domainName":"renegade.com","sld":"renegade","tld":"com"},
{"domainName":"renegade.eu","sld":"renegade","tld":"eu","purchasable":true,"premium":true,"purchasePrice":6594.1,"purchaseType":"aftermarket_s","renewalPrice":9.99},
{"domainName":"renegade.fr","sld":"renegade","tld":"fr"},
{"domainName":"renegade.in","sld":"renegade","tld":"in"},
{"domainName":"renegade.info","sld":"renegade","tld":"info"},
{"domainName":"renegade.io","sld":"renegade","tld":"io"},
{"domainName":"renegade.me","sld":"renegade","tld":"me","purchasable":true,"premium":true,"purchasePrice":4701.2,"purchaseType":"aftermarket_b","renewalPrice":18.99},
{"domainName":"renegade.mobi","sld":"renegade","tld":"mobi","purchasable":true,"purchasePrice":15.99,"purchaseType":"registration","renewalPrice":15.99},
{"domainName":"renegade.net","sld":"renegade","tld":"net"},
{"domainName":"renegade.one","sld":"renegade","tld":"one"},
{"domainName":"renegade.online","sld":"renegade","tld":"online"},
{"domainName":"renegade.org","sld":"renegade","tld":"org"},
{"domainName":"renegade.pro","sld":"renegade","tld":"pro"},
{"domainName":"renegade.re","sld":"renegade","tld":"re","purchasable":true,"purchasePrice":17.99,"purchaseType":"registration","renewalPrice":17.99},
{"domainName":"renegade.site","sld":"renegade","tld":"site"},
{"domainName":"renegade.top","sld":"renegade","tld":"top","purchasable":true,"premium":true,"purchasePrice":2294.25,"purchaseType":"aftermarket_s","renewalPrice":14.99},
{"domainName":"renegade.tv","sld":"renegade","tld":"tv"},
{"domainName":"renegade.world","sld":"renegade","tld":"world","purchasable":true,"purchasePrice":1.99,"purchaseType":"registration","renewalPrice":34.99},
{"domainName":"renegade.xyz","sld":"renegade","tld":"xyz","purchasable":true,"premium":true,"purchasePrice":3444.25,"purchaseType":"aftermarket_s","renewalPrice":14.99}
]}

MisterF · Feb 4, 2019

Thread closed as requested by OP.

Looking for a domain availability api.

javabro

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graham25s

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graham25s

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graham25s

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javabro

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MisterF

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