Never ending story ...

Open API : http://www.wordsfinder.com/api_traffic_estimator.php

• Live Virtual Earth Open API : http://www.microsoft.com/maps/developers/
• MS 개발자 API :http://dev.live.com/

YouTube 개발자 API http://www.youtube.com/dev

amazon 개발자 API : http://aws.amazon.com/

트위터 Open API : http://apiwiki.twitter.com/

bit.ly Open API : http://code.google.com/p/bitly-api/wiki/ApiDocumentation

Blogger API : http://code.blogger.com/

뉴욕타임즈 API : http://developer.nytimes.com/docs

• 페이스북 개발자 센터 : http://developers.facebook.com/
• 페이스북 Graph API : http://developers.facebook.com/docs/api

포스퀘어 API : http://foursquare.com/apps/

Music graphics service : http://www.allcdcovers.com/api

Local recommendation service : http://altergeo.ru/open_api

Book sharing service : http://api.anobii.com/api_home

Email Marketing API : http://www.benchmarkemail.com/API/Library

Online web design platform : http://www.bitrixsoft.com/help/

URL shortening service : http://budurl.com/page/budurlpro-api, http://www.burrp.com/widget/doc/widget/documentation/api-doc.html

Comprehensive Knowledge Archive Network : http://knowledgeforge.net/ckan/doc/ckan/api.html

Business marketing database : http://compass.webservius.com/

Search UK libraries : http://copac.ac.uk/interfaces/srw/

Collaborative translation service : http://crowdin.net/page/api

News feed aggregator : http://code.google.com/p/feedzilla-api/wiki/RestApi

Local events search services : http://www.fizber.com/services/fizber_xml.html#div_events

School finder service : http://www.programmableweb.com/api/fizber-schools

Weather forecasting service : http://corporate.foreca.com/en/products/forecaweatherapi/

Mexican postal code geolocation service : http://www.fraudlabs.com/postalcodeworldMexico.aspx

Mobile cloud sync service : https://capi.forge.funambol.org/

Location based IP tracking service : http://api.nukewarz.com/docapi.php

Email newsletter service : http://www.graphicmail.com/Site/resources_api.aspx

Communication service : http://www.hummingbytes.com/webservices/IIGQuestionAndAnswer.asmx

Electronic invoicing services : http://www.maventa.com/en/community/maventa-api/

Time and goal organization service : http://www.mecanbe.com/apiinfo.aspx

SMS messaging and response service : http://www.mobilecommons.com/developers/api/mdata/

Mobile phone product search service : http://www.mobilephonemegastore.co.uk/pages/api.html

Tree planting service : http://www.mokugift.com/developers/index

Mobile payment platform : http://www.programmableweb.com/api/netmobo-feefactor

Semantic tagging webservice : http://developer.opendover.nl/docs/Home/

Online payment service : http://www.paymentsgateway.com/developers.aspx

Embed RSS feeds on websites : http://pordl.com/

Virtual Private Server hosting : http://docs.quantact.com/api

Radio station database : http://wiki.radioreference.com/index.php/API

SCORM cloud computing service : http://www.scorm.com/scorm-solved/scorm-cloud/develop-a-scorm-cloud-app/

Barcode generator : http://www.searchupc.com/barcodegen.aspx

E-Signature and Agreement Execution service : http://sertifi.zendesk.com/home

Status message search engine : http://archiver.co/api.html

Artificial Intelligence based tools : http://api.solutecia.com/sofia_api.asmx

Real-time UK Cycle Hire data service : http://bike-stats.co.uk/

Web based e-commerce content management system : http://www.ugal.com/api-doc

Geolocation service : https://webgis.usc.edu/Services/Geocode/Default.aspx

Step tracking service : http://walkertracker.com/api/docs/

Shopping cart service : http://wazala.zendesk.com/entries/243667-how-can-i-add-a-custom-button-to-open-the-store-to-a-specific-page

Money management platform : http://www.finappstore.com/specs.html

Customized affiliate and referral programs : http://zferral.com/api-docs

MAP : http://www.multimap.com/openapi/

web analytics : http://dev.piwik.org/trac/wiki/API

Driving directions service : http://www.mapquestapi.com/directions/

Traffic report service : http://www.mapquestapi.com/traffic/

Driving directions service : http://open.mapquestapi.com/directions/

Australian job search site : http://www.zipster.com.au/services

Affiliate marketing network reports : http://blog.shareasale.com/2009/05/27/affiliate-api/

Online business metrics dashboard : http://support.statsmix.com/entries/260111-statsmix-api-documentation

Location based campaign creation and search : http://geotoko.com/api_docs

Online social security number validation : http://www.lyonslive.com/Social-Security-Validation/SSN-Validation-Web-Service.aspx?AspxAutoDetectCookieSupport=1

Search and browse Twitter lists : http://apiwiki.tlists.com/w/page/3817203/FrontPage

Show website technologies : http://webpeep.appspot.com/

URL shortening tool : https://github.com/jamesotron/Shorty/wiki/api

Development platform for IM robots : http://botplatform.com/

French web hosting company : http://www.ovh.com/soapi/en/

Semantic tagging webservice : http://www.complexityintelligence.com/en/knowledgebase/api/nlp_pos_v1

HTML markup cleaning service : http://www.complexityintelligence.com/en/knowledgebase/api/txp_markupcleaner_v1

Chinese city and shopping guide : http://api.dianping.com/

Browser information detection service : http://www.fraudlabs.com/browserobject.aspx

XBox gamer profile data : http://360voice.gamerdna.com/forum/topic.asp?TOPIC_ID=3

Online Chinese shopping platform : http://open.taobao.com/dev/index.php/API_%E6%96%87%E6%A1%A3

Bulk SMS messaging service : http://www.geosion.com/

Email Marketing Service : https://labs.aweber.com/

Single Sign-In/Registration Service : http://wiki.gigya.com/

URL shortening tool : http://tiny-url.info/open_api.html

SMS messaging service : http://distributeit.com.au/sms.html

Bulk SMS messaging service : http://www.freebiesms.co.uk/developers.asp

SMS messaging service : http://grouptexting.com/sms-gateway/index.html

Social Wine Discovery service : http://www.adegga.com/help/api/

Address book organization tool : http://developer.medialab.sonera.fi/info/index.php/Contacts_API

Calendar creation tool : http://developer.medialab.sonera.fi/info/index.php/Calendar_API

Location tracking service : http://developer.medialab.sonera.fi/info/index.php/Position_API

2 Dimensional barcode generator : http://developer.medialab.sonera.fi/info/index.php/Tag_API

Temporary file storage service : http://developer.medialab.sonera.fi/info/index.php/Temporary_Storage_API

Mobile geolocation service : http://developer.medialab.sonera.fi/info/index.php/Location_API

Mobile poll creation service : http://developer.medialab.sonera.fi/info/index.php/Poll_API

SMS messaging service : http://developer.medialab.sonera.fi/info/index.php/SMS_Receive_API

SMS messaging service : http://developer.medialab.sonera.fi/info/index.php/Messaging_API

Presence information and status updating tool : http://developer.medialab.sonera.fi/info/index.php/Presence_API

Video Clip Sharing Service : http://wiki.anyclip.com/

Social media search for wine industry : http://developer.cruvee.com/social-api/

Wine database update system : http://developer.cruvee.com/partner-link/

Cloud hosting platform : http://wiki.scalr.net/API

Customer service chat platform : http://community.liveperson.com/community/developers/product

Scientific journal and books database : http://dev.springer.com/

Text messaging service : http://www.esendex.es/Desarrolladores/Zona-Beta/Rest-API

Social network platform : http://en.netlog.com/go/developer/documentation/article=opensocialapi

Server automation platform: http://help.opscode.com/faqs/cookbooksite/cookbook-site-rest-api

Customer management and invoicing service : http://www.ofuz.com/opensource/wiki/contact_rest_api

Bookmarking and attribution service : http://developers.sni.ps/index.php/Category:REST_API_Documentation

Lithuanian microblogging service : http://blakelt.pbworks.com/w/page/11818684/REST-API-Dokumentacija

Polish transit service : http://jakdojade.pl/pages/api/rest_xml.html

Video sharing service : http://www.garagetv.be/api.ashx?selfdoc&apikey=GTVSelfDocFF&method=all

SSL reseller platform : http://www.geocerts.com/resellers

University organization service : http://wiki.cac.washington.edu/display/groups/Groups+Web+Service+REST+API

CSS showcases : http://www.cssmania.com/api/

Mobile photo sharing service : https://github.com/mislav/instagram/wiki

Online helpdesk tool : http://dev.assistly.com/docs/api

• 이용방법 : http://interface.pandora.tv/?p=use
• 개발가이드 : http://interface.pandora.tv/?p=guide

• 검색 API : http://blog.aladdin.co.kr/ttb/category/16526940?communitytype=MyPaper
• 상품 API : http://blog.aladdin.co.kr/ttb/category/16526941?communitytype=MyPaper
• API사용예제 http://blog.aladdin.co.kr/ttb/category/16526948?communitytype=MyPaper

주요도시 항공요금 검색 API : http://api.tourexpress.com/?p=page2_04

• me2API: http://codian.springnote.com/pages/86001
• ApiKey 요청: http://me2day.net/api/front/appkey
  ※ 메일로 도착
• PHP 라이브러리: http://codian.springnote.com/pages/425517
• PHP 응용소스: http://doubletrack.net/svn/meshupexpo/php/

스프링노트 API 센터 : http://api.springnote.com/

• 위젯 제작 가이드 : http://wzdapi.com/doc/basic_info
• 튜토리얼 : http://wzdapi.com/tutorial/

한RSS Open API : http://www.hanrss.com/help/api/

Maniadb Open API : http://www.maniadb.com/api/apispec.asp

채용정보 검색 오픈API : http://naeil.incruit.com/service/

BlogAPI : http://manual.tistory.com/719

스토리큐 Open API : http://aproxacs.springnote.com/pages/1261604

• KHTG Open API 안내 : http://www.healthtourguide.com/Openapi/guide.aspx
• KHTG Open API 레퍼런스 : http://www.healthtourguide.com/Openapi/Reference.aspx

• 상품검색 API : http://openapi.11st.co.kr/openapi/OpenApiSearch.tmall
• 카테고리 API : http://openapi.11st.co.kr/openapi/OpenApiCategory.tmall
• 상품정보조회 API : http://openapi.11st.co.kr/openapi/OpenApiInfomation.tmall
• 상품이미지검색 API : http://openapi.11st.co.kr/openapi/OpenApiImageSearch.tmall
• 에러코드 메시지안내 : http://openapi.11st.co.kr/openapi/OpenApiErrorCode.tmall

옥션 개발자센터 : http://developer.auction.co.kr/

Open API : http://www.tossi.com/main_faq.do?mode=openapi&clk_pos=main_banner1

Book Open API 안내 : http://book.interpark.com/blog/api/openApiMain.rdo

Open API : http://www.revu.co.kr/OpenAPI

LG ELIT Open API : http://www.lg.or.kr/servlet/help?cmd=OPENAPI

파란 MAP Open API : http://local.paran.com/insidemap/b2b_01.html

이글루스 Open API : http://help.egloos.com/2922

바로쿠폰 Open API : http://www.barocoupon.co.kr/web/openApi/main.ndm

• 서비스 이용절차 : https://www.inip2p.com/api/info.action
• 가이드 : https://www.inip2p.com/api/guide.action
• 가입신청 : https://www.inip2p.com/api/reg.action

SMS: http://cafe.naver.com/allatsopen

Online calendar service : http://lifepod.springnote.com/pages/269153

이미지 편집기 : http://www.npaint.com/npaintapi.php

OpenID를 기반으로 만든 ID 제공 서비스 : https://myid.springnote.com/pages/299576

사진 공유 서비스 : http://www.flickr.com/services/

동영상 관련 OPEN API : http://api.mgoon.com/openApi/index.htm

사진 업로드 : http://www.twipl.net/api/doc

IP 조회 : http://ip.gowini.com/?Gbn=Api

통신판매중계사이트 관련 : http://www.ongabi.com/service/info.ogb?cmd=api

아파트 정보 및 시세 정보 : http://www.neonet.co.kr/novo-rebank/view/openapi/OpenApiHome.neo

전자세금계산서 관련 : http://www.ifreebill.co.kr/web2/openapi/home

전자세금계산서 관련 : http://www.homebill.co.kr/web2/openapi/home

전자세금계산서 관련 : http://gsiko.freebill.co.kr/web2/openapi/home

전자세금계산서 관련 : http://playauto.freebill.co.kr/web2/openapi/home

꼬꼬마 : 형태소 분석 Open API http://kkma.snu.ac.kr/openapi/spec/

SOAPS : Site Open API : http://sir.co.kr/bbs/board.php?bo_table=g4_tiptech&wr_id=9308

http://dev.naver.com/openapi

http://dna.daum.net/DNALatte/openapi/about

http://devsquare.nate.com

http://kr.open.gugi.yahoo.com/index.php

http://code.google.com/intl/ko/more/

• 이용약관 : http://gis.seoul.go.kr/Guide/Flex_map.jsp
• 클래스 참조 : http://gis.seoul.go.kr/Guide/Flex_class.jsp
• 튜토리얼 : http://gis.seoul.go.kr/Guide/Flex_tutorial.jsp
• Open API 예제 :http://gis.seoul.go.kr/Guide/Flex_summary.jsp

검색 Open API :
https://www.knowledge.go.kr/jsp/intro/intro_openapi_01.jsp

Open API 신청 및 안내 :
http://www.korea.go.kr/service/openAPI.do?kind_api=1

Whois Open API : http://whois.kisa.or.kr/
※ 화면 왼쪽 중간 배너로 이동

• Open API 활용 : http://search.archives.go.kr/ArchivesHelp06.htm
• Open API 템플릿 :http://search.archives.go.kr/ArchivesHelp12.htm
• 웹 서비스 활용 : http://search.archives.go.kr/ArchivesHelp13.htm

Open API 이용절차 : http://nos.ndsl.kr/openAPI_Procedures.do
※ 국가과학기술정보 활용 Open API 매뉴얼(PDF) 제공

인터넷우체국 오픈 API : http://biz.epost.go.kr/eportal/custom/custom_9.jsp?subGubun=sub_3&subGubun_1=cum_17&gubun=m07

Open API 가이드라인 :
http://www.mltm.go.kr/USR/WPGE0201/m_23746/DTL.jsp

• 공간통계 OpenAPI 사용안내 :
  http://sgis.kostat.go.kr/contents/shortcut/shortcut_06_01.jsp
• API 제공 리스트 :
  http://sgis.kostat.go.kr/contents/shortcut/shortcut_06_04.jsp

오픈 API : http://www.g4b.go.kr/svc/bcs/ifs/oai/SelectOpenApiList.do
※ Open API 개발 매뉴얼(HWP) 및 소스 파일 제공

• http://openapi.okdab.com/openapi_main.jsp

• http://www.rda.go.kr/etc/api/api_guid.jsp

• http://www.law.go.kr/html/renew/openApiP.html

• 생활공감지도 API : http://gmap.daejeon.go.kr/tcpor/api/LMSOpenApi.do;jsessionid=MKXzvAtyqHSdwzm8oEQjlCjuypiN2U3abs2dXA6Q6Zc0MWOGRxxTQV0e33vXGGb1.tcpor_ap_dj_servlet_engine2

• http://www.nl.go.kr/openApi/guide/index.php

• http://unibook.unikorea.go.kr/?sub_num=184

• http://www.nier.go.kr/eric/portal/kor/es/es-m1/nier-es-05.page

• http://api.gbis.go.kr/

• http://www.epartshub.com/help/index.jsp?submnu=ct100

• http://www.juso.go.kr/info/OpenApiInfo.htm

• http://115.84.165.130/sayong/main.Main.do

• http://tmacs.ts2020.kr/web/TA/common/OpenApiservice.jsp?mid=S1635