rcrossref

1.2.1

Client for Various 'CrossRef' 'APIs'

7packages depend

33.8Kdownloads / year

55.5%test coverage

13/13checks pass

Overview

About

Maintained by Najko JahnFirst published 2014-11-2918 releasesCRAN page ↗GitHub ↗

Client for various 'CrossRef' 'APIs', including 'metadata' search with their old and newer search 'APIs', get 'citations' in various formats (including 'bibtex', 'citeproc-json', 'rdf-xml', etc.), convert 'DOIs' to 'PMIDs', and 'vice versa', get citations for 'DOIs', and get links to full text of articles when available.

Install

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

install.packages("rcrossref", 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("ropensci/rcrossref")

Development version from ropensci/rcrossref. 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-rcrossref

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-rcrossref

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-rcrossref

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

Health

CRAN checks

13OK

Slowest check: 4.3 min · r-devel-linux-x86_64-fedora-clang

Code health

Yes

Tests · ratio 38.16

55.5%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 255 wordsVignettesNopkgdown siteNoNEWSYes · 33% structuredCode of conductNoContributing guideNo

Examples that run: 7%
Documented parameters: 100%
Return-value docs: 7%
References docs: 28%

Downloads

33.8K

CRAN downloads in the past year

Rank #2,731 · ~93/day · ~2.8K/mo

Releases R versions

Daily download trend is not available in this view yet.

1.9K30 days

6.9K90 days

33.8K1 year

Compare downloads with other packages →

Also on198 r2u33 autocran1.4K conda_forge86 c2d4u

Repository

GitHub ↗ ropensci/rcrossref

180Stars

22Forks

25Open issues

1Open PRs

17Releases

723Commits

17Contributors

crossref-apidoimetadataapirrstatsapi-wrapperr-package

723 commits · Last activity 2025-08-22

Repository practices

Upstream repositoryBeta

6 development-tooling and community-health practices detected across 5 families in the upstream repository

Checks run against github.com/ropensci/rcrossref on 2026-07-19.

Continuous integration (1)

GitHub Actions

Reproducibility and dev environment (1)

Makefile

CRAN release process (2)

cran-comments.mdrevdep/

Docs source (1)

README.Rmd

Show all practices

Research and citation (1)

codemeta.json

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

Dependencies

Declared dependencies

19 external dependencies (excludes base and recommended)

Depends (0)

none

Imports (15)

methodsutilsjsonlite crul xml2 (>= 1.1.1)plyr dplyr tibble R6 shiny miniUI stringr DTstatsrlang

LinkingTo (0)

none

Suggests (7)

roxygen2 testthat knitr rmarkdown vcr (>= 0.2.6)bibtex withr

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

7direct

2indirect

biblio Rcompadre bibnets namedropR ref.ICAR rorcid slgf

Code & Tests

People & History

People (5)

Maintainer (1)

Najko Jahn

Author, Maintainer · added in 0.9.0

Authors (5)

Najko Jahn

Author, Maintainer · added in 0.9.0

Author

Author

Author

Author · added in 0.9.0

Listed in earlier versions (1)

Ted Hart

no longer listed · 0.2.0 to 0.8.4

Package Timeline

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

R
R 4.6.0 released · 2026-04-24
1.2.1Latest
2025-08-20 · current release · diff ↗
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
1.2.0
2022-11-11 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
1.1.0
2020-10-02 · diff ↗
R
R 4.0.0 released · 2020-04-24
1.0.0
2020-03-19 · diff ↗
0.9.2
2019-05-05 · diff ↗
R
R 3.6.0 released · 2019-04-26
0.9.0
2019-01-14 · diff ↗
0.8.4
2018-08-07 · diff ↗
R
R 3.5.0 released · 2018-04-23

Show 15 earlier events

0.8.0
2017-12-04 · diff ↗
0.7.0
2017-04-28 · diff ↗
R
R 3.4.0 released · 2017-04-21
0.6.0
2016-11-09 · diff ↗
0.5.8
2016-08-26 · diff ↗
0.5.4
2016-07-20 · diff ↗
R
R 3.3.0 released · 2016-05-03
0.5.2
2016-02-10 · diff ↗
0.5.0
2016-01-20 · diff ↗
0.3.4
2015-07-10 · diff ↗
R
R 3.2.0 released · 2015-04-16
0.3.0
2015-03-04 · diff ↗
0.2.1
2014-12-11 · diff ↗
0.2.0
2014-11-29
R
R 3.1.0 released · 2014-04-10

Package metadata

First published: 2014-11-29
Total releases: 18 / 12 yrs
License: MIT + file LICENSE OSI
Download size: 4.6 MB
Installed size: not tracked yet
With dependencies: not tracked yet

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