RCurl

General Network (HTTP/FTP/...) Client Interface for R

v1.98-1.18 · Mar 21, 2026 · BSD_3_clause + file LICENSE

Description

A wrapper for 'libcurl' <https://curl.se/libcurl/> Provides functions to allow one to compose general HTTP requests and provides convenient functions to fetch URIs, get & post forms, etc. and process the results returned by the Web server. This provides a great deal of control over the HTTP/FTP/... connection and the form of the request while providing a higher-level interface than is available just using R socket connections. Additionally, the underlying implementation is robust and extensive, supporting FTP/FTPS/TFTP (uploads and downloads), SSL/HTTPS, telnet, dict, ldap, and also supports cookies, redirects, authentication, etc.

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CRAN Check Status

3 NOTE

11 OK

Show all 14 flavors

Flavor	Status	Time
r-devel-linux-x86_64-debian-clang	OK	69.1s
r-devel-linux-x86_64-debian-gcc	OK	51.7s
r-devel-linux-x86_64-fedora-clang	OK	98.8s
r-devel-linux-x86_64-fedora-gcc	OK	99.1s
r-devel-macos-arm64	OK	78s
r-devel-windows-x86_64	OK	206s
r-oldrel-macos-arm64	NOTE	61s
r-oldrel-macos-x86_64	NOTE	120s
r-oldrel-windows-x86_64	NOTE	228s
r-patched-linux-x86_64	OK	64.6s
r-release-linux-x86_64	OK	57.9s
r-release-macos-arm64	OK	45s
r-release-macos-x86_64	OK	131s
r-release-windows-x86_64	OK	215s

Check details (4 non-OK)

NOTE r-oldrel-macos-arm64

for GNU extensions in Makefiles

GNU make is a SystemRequirements.

NOTE r-oldrel-macos-x86_64

for GNU extensions in Makefiles

GNU make is a SystemRequirements.

NOTE r-oldrel-windows-x86_64

for GNU extensions in Makefiles

GNU make is a SystemRequirements.

NOTE r-oldrel-windows-x86_64

installed package size

installed size is 11.5Mb
  sub-directories of 1Mb or more:
    libs   9.6Mb

Additional Issues

rchk Details →

Check History

NOTE 10 OK · 4 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 24, 2026

NOTE r-devel-windows-x86_64

compiled code

File 'RCurl/libs/x64/RCurl.dll':
  Found non-API call to R: 'Rf_findVarInFrame'

Compiled code should not call non-API entry points in R.

See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.

NOTE r-oldrel-macos-arm64

for GNU extensions in Makefiles

GNU make is a SystemRequirements.

NOTE r-oldrel-macos-x86_64

for GNU extensions in Makefiles

GNU make is a SystemRequirements.

NOTE r-oldrel-windows-x86_64

installed package size

installed size is 11.5Mb
  sub-directories of 1Mb or more:
    libs   9.6Mb

WARNING 6 OK · 5 NOTE · 3 WARNING · 0 ERROR · 0 FAILURE Mar 20, 2026

NOTE r-devel-linux-x86_64-debian-clang

compiled code

File ‘RCurl/libs/RCurl.so’:
  Found non-API call to R: ‘Rf_findVarInFrame’

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

WARNING r-devel-linux-x86_64-debian-gcc

compiled code

File ‘RCurl/libs/RCurl.so’:
  Found non-API call to R: ‘Rf_findVarInFrame’
This entry point may be removed soon.

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

WARNING r-devel-linux-x86_64-fedora-clang

compiled code

File ‘RCurl/libs/RCurl.so’:
  Found non-API call to R: ‘Rf_findVarInFrame’
This entry point may be removed soon.

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

WARNING r-devel-linux-x86_64-fedora-gcc

compiled code

File ‘RCurl/libs/RCurl.so’:
  Found non-API call to R: ‘Rf_findVarInFrame’
This entry point may be removed soon.

Compiled code should not call non-API entry points in R.

See ‘Writing portable packages’ in the ‘Writing R Extensions’ manual,
and section ‘Moving into C API compliance’ for issues with the use of
non-API entry points.

NOTE r-devel-windows-x86_64

compiled code

File 'RCurl/libs/x64/RCurl.dll':
  Found non-API call to R: 'Rf_findVarInFrame'

Compiled code should not call non-API entry points in R.

See 'Writing portable packages' in the 'Writing R Extensions' manual,
and section 'Moving into C API compliance' for issues with the use of
non-API entry points.

NOTE r-oldrel-macos-arm64

for GNU extensions in Makefiles

GNU make is a SystemRequirements.

NOTE r-oldrel-macos-x86_64

for GNU extensions in Makefiles

GNU make is a SystemRequirements.

NOTE r-oldrel-windows-x86_64

installed package size

installed size is 11.5Mb
  sub-directories of 1Mb or more:
    libs   9.6Mb

NOTE 11 OK · 3 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026

NOTE r-oldrel-macos-arm64

for GNU extensions in Makefiles

GNU make is a SystemRequirements.

NOTE r-oldrel-macos-x86_64

for GNU extensions in Makefiles

GNU make is a SystemRequirements.

NOTE r-oldrel-windows-x86_64

installed package size

installed size is 11.5Mb
  sub-directories of 1Mb or more:
    libs   9.6Mb

Reverse Dependencies (165)

depends

LSPFP R4CouchDB RGoogleFit RapidoPGS RblDataLicense fds pullword pumilioR rLTP rbiouml restimizeapi rneos ropensecretsapi streamR zendeskR

imports

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suggests

BAwiR BED CodeDepends EFDR EvaluateCore HMDHFDplus One4All PGRdup RCPA RXKCD RgoogleMaps SIPDIBGE TreeTools XML archetyper augmentedRCBD berryFunctions bio3d boilerpipeR breakaway d3Network datazoom.amazonia exams genekitr germinationmetrics iNZightTools idiogramFISH latex2exp markdown metagear mosaic rdwd reproducible rqti rsconnect sparklyr spatialEco toolStability trajectories

Dependency Network

Version History

updated 1.98-1.18 ← 1.98-1.17 diff Mar 21, 2026

new 1.98-1.17 Mar 10, 2026

updated 1.98-1.17 ← 1.98-1.16 diff Mar 21, 2025

updated 1.98-1.16 ← 1.98-1.14 diff Jul 10, 2024

updated 1.98-1.14 ← 1.98-1.13 diff Jan 8, 2024

updated 1.98-1.13 ← 1.98-1.12 diff Nov 1, 2023

updated 1.98-1.12 ← 1.98-1.10 diff Mar 26, 2023

updated 1.98-1.10 ← 1.98-1.9 diff Jan 26, 2023

updated 1.98-1.9 ← 1.98-1.8 diff Oct 2, 2022

updated 1.98-1.8 ← 1.98-1.7 diff Jul 29, 2022

updated 1.98-1.7 ← 1.98-1.6 diff Jun 8, 2022

updated 1.98-1.6 ← 1.98-1.5 diff Feb 7, 2022

updated 1.98-1.5 ← 1.98-1.4 diff Sep 16, 2021

updated 1.98-1.4 ← 1.98-1.3 diff Aug 16, 2021

updated 1.98-1.3 ← 1.98-1.2 diff Mar 15, 2021

updated 1.98-1.2 ← 1.98-1.1 diff Apr 17, 2020

updated 1.98-1.1 ← 1.95-4.12 diff Jan 18, 2020

updated 1.95-4.12 ← 1.95-4.11 diff Mar 3, 2019

updated 1.95-4.11 ← 1.95-4.10 diff Jul 14, 2018

updated 1.95-4.10 ← 1.95-4.9 diff Jan 3, 2018