R website screenshot

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.

R publishes 5 APIs on the APIs.io network, including Badges API, Downloads API, Packages API, and 2 more. Tagged areas include R, Statistics, Data Science, Open Source, and Programming Language.

The R catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

R’s developer surface includes documentation, engineering blog, Stack Overflow tag, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub
25.9/100 emerging ▬ flat Agent 20/100 agent aware Front door AI 1/6 silent Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0
AccessFreemium
3 published contracts
RStatisticsData ScienceOpen SourceProgramming Language

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0
Composite quality — 25.9/100 · emerging
Contract Quality 10.8 / 21
Developer Ergonomics 2.8 / 17
Access Clarity 0.0 / 17
Operational Transparency 1.5 / 11
Contract Governance 1.4 / 10
Discoverability 6.1 / 9
Regulatory Posture 1.6 / 15
Agent readiness — 20/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 6 / 6
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 9 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 4 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/r: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 5

Individual APIs this provider publishes, each with its own machine-readable definition.

R Badges API

Download count badge endpoints

R Downloads API

Package download statistics

R Packages API

CRAN package metadata

R Top Packages API

Most-downloaded CRAN packages

R Versions API

R release version information

Open Collections 9

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

METACRAN CranDB Badges API

OPEN COLLECTION

METACRAN CranDB Badges Downloads API

OPEN COLLECTION

METACRAN CranDB API

OPEN COLLECTION

METACRAN CranLogs API

OPEN COLLECTION

METACRAN CranDB Badges Packages API

OPEN COLLECTION

R Versions API

OPEN COLLECTION

METACRAN CranDB Badges Top Packages API

OPEN COLLECTION

METACRAN CranDB Badges Versions API

OPEN COLLECTION

Scroll for all 9

Pricing Plans 1

Published pricing tiers and plan structures.

R Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

R Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

R Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

R Context

8 classes · 10 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

R API Rules

5 rules · 3 warnings 2 info

SPECTRAL

R API Rules

13 rules · 2 errors 10 warnings 1 info

SPECTRAL

JSON Schema 3

Standalone JSON Schema definitions for this provider's data models.

CRAN Package

18 properties

JSON SCHEMA

CRAN Package Download Statistics

4 properties

JSON SCHEMA

R Version

3 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

R Cran Package Structure

0 properties

JSON STRUCTURE

Examples 3

Example request and response payloads for these APIs.

R Get Package Download Totals Example

2 fields

EXAMPLE

R Get Package Metadata Example

2 fields

EXAMPLE

R Get R Release Example

2 fields

EXAMPLE

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

R Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

R Agentic Access

14 operations

14 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

PackageRegistry
PackageRegistry
 PackageRegistry
PackageRegistry

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrg
GitHubOrg
 GitHubOrg
GitHubOrg
 PackageSearch
PackageSearch
 PackageSearch
PackageSearch

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Forums
Forums
 StackOverflow
StackOverflow

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: r
name: R
description: 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.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/r.png
url: https://raw.githubusercontent.com/api-evangelist/r/refs/heads/main/apis.yml
tags:
- R
- Statistics
- Data Science
- Open Source
- Programming Language
tags_raw:
- R
- Statistics
- Data Science
- Open Source
- Programming Language
- Open-Source
created: '2025-01-01'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: r:r-badges-api
  name: R Badges API
  description: Download count badge endpoints
  humanURL: https://github.com/metacran/crandb
  baseURL: https://crandb.r-pkg.org
  tags:
  - Badges
  properties:
  - type: OpenAPI
    url: openapi/r-badges-api-openapi.yml
  - type: Documentation
    url: https://github.com/metacran/crandb
  - type: Documentation
    url: https://github.com/metacran/cranlogs.app
  - type: Documentation
    url: https://github.com/metacran/rversions.app
- aid: r:r-downloads-api
  name: R Downloads API
  description: Package download statistics
  humanURL: https://github.com/metacran/crandb
  baseURL: https://crandb.r-pkg.org
  tags:
  - Downloads
  properties:
  - type: OpenAPI
    url: openapi/r-downloads-api-openapi.yml
  - type: Documentation
    url: https://github.com/metacran/crandb
  - type: Documentation
    url: https://github.com/metacran/cranlogs.app
  - type: Documentation
    url: https://github.com/metacran/rversions.app
- aid: r:r-packages-api
  name: R Packages API
  description: CRAN package metadata
  humanURL: https://github.com/metacran/crandb
  baseURL: https://crandb.r-pkg.org
  tags:
  - Packages
  properties:
  - type: OpenAPI
    url: openapi/r-packages-api-openapi.yml
  - type: Documentation
    url: https://github.com/metacran/crandb
  - type: Documentation
    url: https://github.com/metacran/cranlogs.app
  - type: Documentation
    url: https://github.com/metacran/rversions.app
- aid: r:r-top-packages-api
  name: R Top Packages API
  description: Most-downloaded CRAN packages
  humanURL: https://github.com/metacran/crandb
  baseURL: https://crandb.r-pkg.org
  tags:
  - Top Packages
  properties:
  - type: OpenAPI
    url: openapi/r-top-packages-api-openapi.yml
  - type: Documentation
    url: https://github.com/metacran/crandb
  - type: Documentation
    url: https://github.com/metacran/cranlogs.app
  - type: Documentation
    url: https://github.com/metacran/rversions.app
- aid: r:r-versions-api
  name: R Versions API
  description: R release version information
  humanURL: https://github.com/metacran/crandb
  baseURL: https://crandb.r-pkg.org
  tags:
  - Versions
  properties:
  - type: OpenAPI
    url: openapi/r-versions-api-openapi.yml
  - type: Documentation
    url: https://github.com/metacran/crandb
  - type: Documentation
    url: https://github.com/metacran/cranlogs.app
  - type: Documentation
    url: https://github.com/metacran/rversions.app
common:
- type: AgenticAccess
  url: agentic-access/r-agentic-access.yml
- type: DomainSecurity
  url: security/r-domain-security.yml
- type: Website
  url: https://www.r-project.org/
- type: Documentation
  url: https://cran.r-project.org/manuals.html
- type: GitHubOrg
  url: https://github.com/r-lib
- type: GitHubOrg
  url: https://github.com/r-devel
- type: PackageRegistry
  url: https://cran.r-project.org/
- type: PackageRegistry
  url: https://bioconductor.org/
- type: PackageSearch
  url: https://www.rdocumentation.org/
- type: PackageSearch
  url: https://rdrr.io/
- type: Blog
  url: https://blog.r-project.org/
- type: Forums
  url: https://stat.ethz.ch/mailman/listinfo/r-help
- type: StackOverflow
  url: https://stackoverflow.com/questions/tagged/r
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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