Beautiful APIs Cesare Pautasso Thisbookisforsaleat https://leanpub.com/beautiful-apis ThisversionwaspublishedonFebruary5,2021. ©2021CesarePautasso Beautiful APIs Cesare Pautasso Preface ThisillustratedbookpresentsacollectionofWebAPIs. While there are many books on how to design good APIs, the goal of this book is to showasmallsampleofactualAPIdesignssothatwecanlearnfromthem. The APIs we have represented are Web APIs: they come from the time when many attemptedwithverydifferentresultstousetheHTTPprotocoltoremotelyinvokesoft- waredeliveredasaservice. ThediagramsyouwillfindbrowsingthisbookshowthestructureofWebAPIsrepre- sentedastreesofresources. Thebulbsattachedalongthebranchesofthetreeindicate whichmethodscanbeappliedtoeachresource. EveryAPIshowninthisbookexistedatsomepointintime: whileitsdescriptionmay havesurviveduntiltodaystoredinsomeopen-sourcecoderepository,theservicebe- hind it may no longer be available to be remotely invoked across the Web. There is absolutelynorelationshipbetweentheformerandthelatter. TheAPIshavebeenselectedmainlyduetotheirvisualappearance. WewishyoutoenjoylookingatthesebeautifulAPIs. ii POST search 1 POSTGET GET events {id} 2 GET GET translate braille dots GET html GET image GET unicode 3 GET GET {debtorNo} naturalperson GET legalperson GET postaladdress GET Debtors contactinfo GET staticstics GET otherinfo GET idno {debtorID} 4 GET GET base binary GET hex GET octal GET cardinal GET currency GET fact GET is-cube GET is-palindrome GET is-square GET numbers is-triangle GET nod GET chinese GET numeral egyptian GET GET roman factors GET ordinal GET is-fermat-prime GET pi GET is-fibonacci-prime GET is-mersenne-prime prime GET is-partition-prime GET is-pell-prime GET random GET is-perfect GET is-prime 5