R

R is a free, open-source programming language and statistical computing environment maintained by the R Core Team and supported by the R Foundation. It provides a wide variety of statistical and graphical techniques and is highly extensible through its package ecosystem on CRAN (Comprehensive R Archive Network), Bioconductor, and GitHub. R is widely used among statisticians, data scientists, and researchers for data analysis, visualization, and reproducible research.

Website: https://www.r-project.org/ Package Registry: https://cran.r-project.org/ GitHub Org: https://github.com/r-lib APIs.yml: https://raw.githubusercontent.com/api-evangelist/r/refs/heads/main/apis.yml

APIs

METACRAN CranDB API

CouchDB-based REST API providing programmatic access to metadata for all CRAN R packages. Supports package lookup, version history, and package dependency data in JSON format. No authentication required.

• Base URL: https://crandb.r-pkg.org
• Documentation: https://github.com/metacran/crandb
• OpenAPI: openapi/r-metacran-crandb-openapi.yml

METACRAN CranLogs API

REST API providing download statistics for R packages from the RStudio CRAN mirror. Supports daily, weekly, monthly, and grand-total download counts with badge generation endpoints. No authentication required.

• Base URL: https://cranlogs.r-pkg.org
• Documentation: https://github.com/metacran/cranlogs.app
• OpenAPI: openapi/r-metacran-cranlogs-openapi.yml

R Versions API

REST API reporting current and previous stable releases of R, including version numbers, release dates, and nicknames. Used by CI/CD tools and package managers to determine supported R versions.

• Base URL: https://rversions.r-pkg.org
• Documentation: https://github.com/metacran/rversions.app
• OpenAPI: openapi/r-rversions-openapi.yml

OpenAPI Specifications

API	File
METACRAN CranDB API	openapi/r-metacran-crandb-openapi.yml
METACRAN CranLogs API	openapi/r-metacran-cranlogs-openapi.yml
R Versions API	openapi/r-rversions-openapi.yml

Capabilities

Naftiko capabilities combining the METACRAN APIs into analytics workflows.

Capability	Description
capabilities/r-package-analytics.yaml	R package ecosystem analytics combining metadata, download statistics, and R version data

Shared Definitions

API	File
METACRAN CranDB	capabilities/shared/metacran-crandb.yaml
METACRAN CranLogs	capabilities/shared/metacran-cranlogs.yaml
R Versions	capabilities/shared/rversions.yaml

JSON Schema

Schema	File
CRAN Package	json-schema/r-cran-package-schema.json
Download Statistics	json-schema/r-download-stats-schema.json
R Version	json-schema/r-version-schema.json

JSON Structure

Structure	File
CRAN Package	json-structure/r-cran-package-structure.json

JSON-LD

Context	File
R Context	json-ld/r-context.jsonld

Examples

Example	File
Get Package Download Totals	examples/r-get-package-download-totals-example.json
Get Package Metadata	examples/r-get-package-metadata-example.json
Get Current R Release	examples/r-get-r-release-example.json

Rules

Ruleset	File
R Spectral Rules	rules/r-spectral-rules.yml

Vocabulary

Vocabulary	File
R Vocabulary	vocabulary/r-vocabulary.yml

Tags

R, Statistics, Data Science, Open Source, Programming Language, CRAN

Maintainers

FN: Kin Lane Email: kin@apievangelist.com