curl: A Modern and Flexible Web Client for R

The curl() and curl_download() functions provide highly configurable drop-in replacements for base url() and download.file() with better performance, support for encryption (https, ftps), gzip compression, authentication, and other 'libcurl' goodies. The core of the package implements a framework for performing fully customized requests where data can be processed either in memory, on disk, or streaming via the callback or connection interfaces. Some knowledge of 'libcurl' is recommended; for a more-user-friendly web client see the 'httr' package which builds on this package with http specific tools and logic.

Version: 3.1
Depends: R (≥ 3.0.0)
Suggests: testthat (≥ 1.0.0), knitr, jsonlite, rmarkdown, magrittr, httpuv, webutils
Published: 2017-12-12
Author: Jeroen Ooms [cre, aut], Hadley Wickham [ctb], RStudio [cph]
Maintainer: Jeroen Ooms <jeroen at>
License: MIT + file LICENSE
URL: (devel) (upstream)
NeedsCompilation: yes
SystemRequirements: libcurl: libcurl-devel (rpm) or libcurl4-openssl-dev (deb).
Materials: NEWS
In views: WebTechnologies
CRAN checks: curl results


Reference manual: curl.pdf
Vignettes: The curl package: a modern R interface to libcurl
Package source: curl_3.1.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
OS X El Capitan binaries: r-release: curl_3.1.tgz
OS X Mavericks binaries: r-oldrel: curl_3.1.tgz
Old sources: curl archive

Reverse dependencies:

Reverse depends: CytobankAPI, VarfromPDB
Reverse imports: abbyyR, addinslist, aws.ec2metadata, AzureML, BatchGetSymbols, biomartr, bomrang, brranching, captr, citr, clarifai, clinPK, CRANsearcher, crul, crunch, data360r, dataRetrieval, datarobot, ecb, elastic, EventStudy, exifr, FedData, federalregister, finreportr, foghorn, geoknife, GetDFPData, GetHFData, GetITRData, GetLattesData, GetTDData, gitgadget, githubinstall, googleCloudStorageR, googledrive, googleway, gpg, GSODR, gtrendsR, HMMoce, httr, humanleague, itunesr, jsonld, kokudosuuchi, LAGOSNE, magick, meteoland, MTurkR, MTurkRGUI, OAIHarvester, opencpu, OpenML, osmdata, osmplotr, pafdR, pageviews, PakPC2017, pdfetch, pkggraph, quantmod,, random, rdian, rdomains, rdryad, refimpact, request, rgho, RInno, rio, rosm, rpdo, RPublica, RPushbullet, rversions, sbtools, scidb, secret, soilDB, splashr, stplanr, taxizedb, telegram, tesseract, textreadr, tidyquant, trelliscope, TTR, udapi, V8, W3CMarkupValidator, weatherData, webmockr, webutils, wikitaxa, wrswoR.benchmark
Reverse suggests: commonmark, CytobankAPIstats, data.table, devtools, fauxpas, fingertipsR, installr, jsonlite, plotly, readr, remotes, rtypeform, RxODE, showtextdb, sysfonts, xml2


Please use the canonical form to link to this page.