roadoi: Find Free Versions of Scholarly Publications via Unpaywall

This web client interfaces Unpaywall <>, formerly oaDOI, a service finding free full-texts of academic papers by linking DOIs with open access journals and repositories. It provides unified access to various data sources for open access full-text links including Crossref and the Directory of Open Access Journals (DOAJ). API usage is free and no registration is required.

Version: 0.6
Imports: httr, jsonlite, dplyr, plyr, purrr, tibble, miniUI, shiny (≥ 1.0.3), tidyr
Suggests: roxygen2 (≥ 6.0.1), testthat, knitr, covr, rmarkdown, rcrossref, lintr
Published: 2019-09-15
Author: Najko Jahn [aut, cre], Tuija Sonkkila ORCID iD [rev] (Tuija Sonkkila reviewed the package for rOpenSci, see, Ross Mounce ORCID iD [rev] (Ross Mounce reviewed the package for rOpenSci, see
Maintainer: Najko Jahn <najko.jahn at>
License: MIT + file LICENSE
NeedsCompilation: no
Materials: README NEWS
In views: WebTechnologies
CRAN checks: roadoi results


Reference manual: roadoi.pdf
Vignettes: Introduction to roadoi
Package source: roadoi_0.6.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release: roadoi_0.6.tgz, r-oldrel: roadoi_0.6.tgz
Old sources: roadoi archive


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