Web Calendar Access Protocol (WCAP) er en protokoll for ekstern klient-tjener-tilgang på digitale kalendere basert på internett-standardene XML, HTTP, iCalendar, og vCard.
WCAP ble opprettet for bruk med produktet som til slutt ble Sun Java System Calendar Server, men ble også brukt av åpen-kildekode-prosjektet Buni Meldware. WCAP bruker enkle HTTP GET-kommandoer for å få tilgang til iCalendar-, Freebusy-, TODO- og vCard-oppføringer. WCAP-responser er enten det tradisjonelle tekstskjemaet eller en XML-form av iCalendar eller de andre nevnte standardene. Det finnes flere programtillegg (plugins), inkludert for Mozilla Thunderbird, Novell Evolution og Microsoft Outlook.
CalDAV er en konkurrerende protokoll som per 2007 gjenningikk standardisering.[når?]]
GET /wcap/get_freebusy.wcap?appid=mozilla-calendar&calid=mailto%3Atom%40localhost&busyonly=1&dtstart=20070521T040000Z&dtend=20070525T040000Z&fmt-out=text%2Fxml&id=17046506 HTTP/1.1 Host: localhost:8080 User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.10) Gecko/20070403 Thunderbird/1.5.0.10 Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip, deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Connection: keep-alive Pragma: no-cache Cache-Control: no-cache
HTTP/1.1 200 OK Server: Apache-Coyote/1.1 X-Powered-By: Servlet 2.4; JBoss-4.0.4.GA (build: CVSTag=JBoss_4_0_4_GA date=200605151000)/Tomcat-5.5 Set-Cookie: JSESSIONID=41DAC48C79927D68EDFAF5FBFD491236; Path=/ Content-Type: text/html;charset=ISO-8859-1 Content-Length: 1399 Date: Mon, 21 May 2007 19:43:37 GMT <?xml version="1.0" encoding="UTF-8"?> <iCalendar> <iCal version="2.0" prodid="-//Buni Meldware Calendar Server 0.8//EN" METHOD="PUBLISH"> <X-NSCP-CALPROPS-LAST-MODIFIED>20061102T170639Z</X-NSCP-CALPROPS-LAST-MODIFIED> <X-NSCP-CALPROPS-CREATED>20060814T110002Z</X-NSCP-CALPROPS-CREATED> <X-NSCP-CALPROPS-READ>999</X-NSCP-CALPROPS-READ> <X-NSCP-CALPROPS-WRITE>999</X-NSCP-CALPROPS-WRITE> <X-NSCP-CALPROPS-RELATIVE-CALID>tom</X-NSCP-CALPROPS-RELATIVE-CALID> <X-NSCP-CALPROPS-NAME>tom</X-NSCP-CALPROPS-NAME> <X-NSCP-CALPROPS-PRIMARY-OWNER>tom</X-NSCP-CALPROPS-PRIMARY-OWNER> <X-NSCP-CALPROPS-ACCESS-CONTROL-ENTRY>@@o^c^WDEIC^g</X-NSCP-CALPROPS-ACCESS-CONTROL-ENTRY> <X-NSCP-CALPROPS-ACCESS-CONTROL-ENTRY>@@o^a^RSF^g</X-NSCP-CALPROPS-ACCESS-CONTROL-ENTRY> <X-NSCP-CALPROPS-ACCESS-CONTROL-ENTRY>@^a^rsf^g</X-NSCP-CALPROPS-ACCESS-CONTROL-ENTRY> <X-NSCP-CALPROPS-ACCESS-CONTROL-ENTRY>@^c^^g</X-NSCP-CALPROPS-ACCESS-CONTROL-ENTRY> <X-NSCP-CALPROPS-ACCESS-CONTROL-ENTRY>@^p^r^g</X-NSCP-CALPROPS-ACCESS-CONTROL-ENTRY> <X-NSCP-CALPROPS-RESOURCE>0</X-NSCP-CALPROPS-RESOURCE> <X-S1CS-CALPROPS-ALLOW-DOUBLEBOOKING>1</X-S1CS-CALPROPS-ALLOW-DOUBLEBOOKING> <FREEBUSY> <START>20070521T040000Z</START> <END>20070525T040000Z</END> <FB FBTYPE="BUSY">20070521T130000Z/20070521T140000Z</FB><FB FBTYPE="BUSY">20070521T150000Z/20070521T160000Z</FB> </FREEBUSY> <X-NSCP-WCAP-ERRNO>0</X-NSCP-WCAP-ERRNO> </iCal> </iCalendar>