curl | R Observatory

Overview

About

Maintained by Jeroen OomsFirst published 2014-11-2057 releasesCRAN page ↗GitHub ↗

Bindings to 'libcurl' https://curl.se/libcurl/ for performing fully configurable HTTP/FTP requests where responses can be processed 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 'httr2' package which builds on this package with http specific tools and logic.

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("curl", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("jeroen/curl")

Development version from jeroen/curl. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-curl

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-curl

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-curl

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

1ERROR1WARNING3NOTE8OK

Failing flavors

WARNING r-devel-linux-x86_64-fedora-gcc
NOTE r-oldrel-macos-arm64
NOTE r-oldrel-macos-x86_64
NOTE r-oldrel-windows-x86_64
ERROR r-release-macos-arm64

Slowest check: 7.2 min · r-oldrel-macos-arm64

Code health

Yes

Tests · ratio 0.59

79.1%

Coverage · measured lines

100%

Documentation · exports

0

Dependencies · direct

Check history

ERROR2026-04-27
8 OK · 3 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-04-24
7 OK · 7 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-04-16
6 OK · 7 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-31
6 OK · 8 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-03-28
5 OK · 8 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE

Show 5 earlier snapshots

NOTE2026-03-25
6 OK · 8 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-03-22
6 OK · 7 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-16
6 OK · 8 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-03-15
5 OK · 8 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
NOTE2026-03-10
6 OK · 8 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMENoVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 71%
Documented parameters: 100%
Return-value docs: 21%
References docs: 0%

Downloads

16.2M

CRAN downloads in the past year

Rank #23 · ~44.3K/day · ~1.3M/mo

Releases R versions

Daily download trend is not available in this view yet.

1.3M30 days

4.3M90 days

16.2M1 year

Compare downloads with other packages →

Also on180.7K r2u2.5K autocran1.1M conda_forge16.7K c2d4u

Repository

GitHub ↗ jeroen/curl

232Stars

75Forks

9Open issues

2Open PRs

41Releases

1,330Commits

28Contributors

1,330 commits · Last activity 2026-07-20 · 0% stars, 30d

Stars over time

2025-07-17 · 2262026-07-07 · 232

Repository practices

Upstream repositoryBeta

2 development-tooling and community-health practices detected across 2 families in the upstream repository

Checks run against github.com/jeroen/curl on 2026-07-19.

Continuous integration (1)

GitHub Actions

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

8 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.0.0

Imports (0)

none

LinkingTo (0)

none

Suggests (8)

spelling testthat knitr jsonlite later rmarkdown httpuv webutils

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

690direct

3,319indirect

and 642 more packages.

Code & Tests

Code Composition

C 3,620 (42%)R 3,138 (37%)Rd 1,210 (14%)Vignettes 556 (7%)Other 25 (0%)

Code characteristics

Object systems

S34

Cyclomatic complexity: 1.0 median / 16 max
Test cases: 79 / 0.59 per code line
System requirements: 1 external

Test coverage

Line coverage

79%

Expression

79.6%

Tests / Examples

79.1% / 54% ex

Functions

214 43 exported

Complexity

2.7 avg / 16 max

Call network

214 nodes / 243 edges

Call graph

Open call graph →

Loading call graph…

Lowest coverage

214 functions

Function	Cyclo	Coverage
curl_fetch_echo exp	1	0%
curl_fetch_stream exp	3	0%
curl_options_table exp	1	0%
curl_symbols exp	1	0%
ie_get_proxy_for_url exp	7	0%
ie_proxy_info exp	1	0%

People & History

People (3)

Maintainer (1)

Jeroen Ooms

Author, Maintainer

Authors (1)

Jeroen Ooms

Author, Maintainer

Contributors (1)

Hadley Wickham

Contributor · added in 0.6

Copyright holders (1)

Posit Software, PBC

Copyright holder · added in 6.0.0

Listed in earlier versions (1)

RStudio

no longer listed · 0.6 to 5.2.3

Package Timeline

57 releases. Pick two to compare their code metrics. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
7.1.0Latest
2026-04-22 · current release · diff ↗
7.0.0
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6.4.0
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R
R 4.5.0 released · 2025-04-11
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2024-09-20 · diff ↗
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2024-08-26 · diff ↗
R
R 4.4.0 released · 2024-04-24

Show 54 earlier events

5.2.1
2024-03-02 · diff ↗
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2023-06-08 · diff ↗
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R 4.3.0 released · 2023-04-21
5.0.0
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2022-10-06 · diff ↗
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R 4.2.0 released · 2022-04-22
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R 4.1.0 released · 2021-05-18
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R 4.0.0 released · 2020-04-24
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R
R 3.6.0 released · 2019-04-26
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R 3.5.0 released · 2018-04-23
3.2
2018-03-28 · diff ↗
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2017-07-22 · diff ↗
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R 3.4.0 released · 2017-04-21
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R
R 3.3.0 released · 2016-05-03
0.9.7
2016-04-10 · diff ↗
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2015-05-19 · diff ↗
R
R 3.2.0 released · 2015-04-16
0.5
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0.4
2015-01-08 · diff ↗
0.3
2014-12-01 · diff ↗
0.2
2014-11-20
R
R 3.1.0 released · 2014-04-10

Package metadata

First published: 2014-11-20
Total releases: 57 / 12 yrs
License: MIT + file LICENSE OSI
Minimum R: ≥ 3.0.0
Download size: 714 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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