ctxR

1.1.3

Utilities for Interacting with the 'CTX' APIs

1packages depend

11.6Kdownloads / year

66.5%test coverage

13/13checks pass

Overview

About

Maintained by Madison FeshukFirst published 2024-07-045 releasesCRAN page ↗GitHub ↗

Access chemical, hazard, bioactivity, and exposure data from the Computational Toxicology and Exposure ('CTX') APIs https://www.epa.gov/comptox-tools/computational-toxicology-and-exposure-apis. 'ctxR' was developed to streamline the process of accessing the information available through the 'CTX' APIs without requiring prior knowledge of how to use APIs. Most data is also available on the CompTox Chemical Dashboard ('CCD') https://comptox.epa.gov/dashboard/ and other resources found at the EPA Computational Toxicology and Exposure Online Resources https://www.epa.gov/comptox-tools.

Install

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

install.packages("ctxR", 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("USEPA/ctxR")

Development version from USEPA/ctxR. 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-ctxr

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

# 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-ctxR

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

Health

CRAN checks

13OK

Slowest check: 3.9 min · r-oldrel-windows-x86_64

Check history

OK2026-06-09
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
ERROR2026-06-08
12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

Documentation signals are not tracked yet for this package.

Downloads

11.6K

CRAN downloads in the past year

Rank #4,964 · ~32/day · ~970/mo

ctxR Releases R versions

Daily download trend is not available in this view yet.

47730 days

1.8K90 days

11.6K1 year

Compare downloads with other packages →

Also on137 r2u25 autocran1.3K conda_forge

Repository

GitHub ↗ usepa/ctxr

23Stars

9Forks

8Open issues

1Open PRs

5Releases

1,136Commits

6Contributors

comptoxccteordapictxresearch

License GPL-3.0 · 1,136 commits · Last activity 2026-06-30 · +9.5% stars, 30d

Repository practices

Upstream repositoryBeta

6 development-tooling and community-health practices detected across 4 families in the upstream repository

Checks run against github.com/usepa/ctxr on 2026-07-19.

Continuous integration (1)

GitHub Actions

CRAN release process (3)

cran-comments.mdrevdep/CRAN-SUBMISSION

Docs source (1)

README.Rmd

Lint, format, editor (1)

RStudio project

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

Dependencies

Declared dependencies

25 external dependencies (excludes base and recommended)

Depends (1)

R >= 3.5

Imports (11)

cli data.table httr jsonlite purrr rlang stringr tidyr tibble urltools lifecycle

LinkingTo (0)

none

Suggests (14)

countcolors devtools DT ggplot2 gridExtra htmlTable httptest kableExtra knitr prettydoc rmarkdown rmdformats testthat XML

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

0indirect

tcpl

Code & Tests

Datasets

People & History

People (6)

Maintainer (1)

Madison Feshuk

Contributor, Maintainer

Authors (2)

Paul Kruse

Author

Caroline Ring

Author

Contributors (4)

Madison Feshuk

Contributor, Maintainer

Jason Brown

Contributor

Brianna Dirks

Contributor · added in 1.1.3

Carter Thunes

Contributor

Package Timeline

5 releases. R releases are shown for context.

R
R 4.6.0 released · 2026-04-24
1.1.3Latest
2025-10-08 · current release · diff ↗
R
R 4.5.0 released · 2025-04-11
1.1.2
2025-04-07 · diff ↗
1.1.1
2025-04-02 · diff ↗
1.1.0
2025-01-08 · diff ↗
1.0.0
2024-07-04
R
R 4.4.0 released · 2024-04-24

Package metadata

First published: 2024-07-04
Total releases: 5 / 2 yrs
License: GPL (>= 3) OSI
Download size: 4.5 MB
Installed size: not tracked yet
With dependencies: not tracked yet

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