This Task View contains information about to use R and the world wide web together. The base version of R does not ship with many tools for interacting with the web. Thankfully, there are an increasingly large number of tools for interacting with the web. This task view focuses on packages for obtaining web-based data and information, frameworks for building web-based R applications, and online services that can be accessed from R. A list of available packages and functions is presented below, grouped by the type of activity. The Open Data Task View provides further discussion of online data sources that can be accessed from R.
If you have any comments or suggestions for additions or improvements for this Task View, go to GitHub and submit an issue, or make some changes and submit a pull request. If you can’t contribute on GitHub, send Scott an email. If you have an issue with one of the packages discussed below, please contact the maintainer of that package. If you know of a web service, API, data source, or other online resource that is not yet supported by an R package, consider adding it to the package development to do list on GitHub.
Core Tools For HTTP Requests
There are two packages that should cover most use cases of interacting with the web from R. httr provides a user-friendly interface for executing HTTP methods (GET, POST, PUT, HEAD, DELETE, etc.) and provides support for modern web authentication protocols (OAuth 1.0, OAuth 2.0). HTTP status codes are helpful for debugging HTTP calls. httr makes this easier using, for example,
stop_for_status(), which gets the http status code from a response object, and stops the function if the call was not successful. (See also
warn_for_status().) Note that you can pass in additional libcurl options to the
config parameter in http calls. curl is a lower-level package that provides a closer interface between R and the libcurl C library, but is less user-friendly. It may be useful for operations on web-based XML or to perform FTP operations.
curl::curl() is an SSL-compatible replacement for base R’s
url() and has support for http 2.0, SSL (https, ftps), gzip, deflate and more. For websites serving insecure HTTP (i.e. using the “http” not “https” prefix), most R functions can extract data directly, including
read.csv; this also applies to functions in add-on packages such as
XML::parseXML. For more specific situations, the following resources may be useful:
- RCurl is another low level client for libcurl. Of the two low-level curl clients, we recommend using curl. httpRequest is another low-level package for HTTP requests that implements the GET, POST and multipart POST verbs, but we do not recommend its use.
- crul (GitHub) is an R6-based HTTP client that provides asynchronous HTTP requests, a pagination helper, HTTP mocking via webmockr, and request caching via vcr. It targets developers of other R packages more so than end users.
- hrbrmstr/curlconverter (not on CRAN) is a useful package for converting curl command-line code, for example from a browser developer’s console, into R code.
- request provides a high-level package that is useful for developing other API client packages. httping provides simplified tools to ping and time HTTP requests, around httr calls. httpcache provides a mechanism for caching HTTP requests.
- For dynamically generated webpages (i.e., those requiring user interaction to display results), ropensci/RSelenium can be used to automate those interactions and extract page contents. It provides a set of bindings for the Selenium 2.0 webdriver using the JsonWireProtocol. It can also aid in automated application testing, load testing, and web scraping. seleniumPipes (GitHub) provides a “pipe”-oriented interface to the same. cpsievert/rdom (not on CRAN) uses phantomjs to access a webpage’s Document Object Model (DOM). hrbrmstr/decapitated provides headless Chrome browser orchestration.
- For capturing static content of web pages postlightmercury is a client for the web service Mercury that turns web pages into structured and clean text.
- Another, higher-level alternative package useful for webscraping is rvest, which is designed to work with magrittr to make it easy to express common web scraping tasks.
- Many base R tools can be used to download web content, provided that the website does not use SSL (i.e., the URL does not have the “https” prefix).
download.file() is a general purpose function that can be used to download a remote file. For SSL, the
download() function in downloader wraps
download.file(), and takes all the same arguments.
- Tabular data sets (e.g., txt, csv, etc.) can be input using
read.csv(), and friends, again assuming that the files are not hosted via SSL. An alternative is to use
RCurl::getURL) to first read the file into R as a character vector before parsing with
read.table(text=...), or you can download the file to a local directory. rio (GitHub) provides an
import() function that can read a number of common data formats directly from an https:// URL. The repmis function
source_data() can load and cache plain-text data from a URL (either http or https). That package also includes
source_Dropbox() for downloading/caching plain-text data from non-public Dropbox folders and
source_XlsxData() for downloading/caching Excel xlsx sheets.
- Authentication: Using web resources can require authentication, either via API keys, OAuth, username:password combination, or via other means. Additionally, sometimes web resources that require authentication be in the header of an http call, which requires a little bit of extra work. API keys and username:password combos can be combined within a url for a call to a web resource (api key: http://api.foo.org/?key=yourkey; user/pass: http://username:email@example.com), or can be specified via commands in RCurl or httr. OAuth is the most complicated authentication process, and can be most easily done using httr. See the 6 demos within httr, three for OAuth 1.0 (linkedin, twitter, vimeo) and three for OAuth 2.0 (facebook, GitHub, google). ROAuth is a package that provides a separate R interface to OAuth. OAuth is easier to to do in httr, so start there. MarkEdmondson1234/googleAuthR provides an OAuth 2.0 setup specifically for Google web services.
Handling HTTP Errors/Codes
- fauxpas brings a set of Ruby or Python like R6 classes for each individual HTTP status code, allowing simple and verbose messages, with a choice of using messages, warnings, or stops.
- httpcode is a simple package to help a user/package find HTTP status codes and associated messages by name or number.
Parsing Structured Web Data
- XML: There are two packages for working with XML: XML and xml2 (GitHub). Both support general XML (and HTML) parsing, including XPath queries. The package xml2 is less fully featured, but more user friendly with respect to memory management, classes (e.g., XML node vs. node set vs. document), and namespaces. Of the two, only the XML supports de novo creation of XML nodes and documents. The XML2R (GitHub) package is a collection of convenient functions for coercing XML into data frames. An alternative to XML is selectr, which parses CSS3 Selectors and translates them to XPath 1.0 expressions. XML package is often used for parsing xml and html, but selectr translates CSS selectors to XPath, so can use the CSS selectors instead of XPath.
- HTML: All of the tools that work with XML also work for HTML, though HTML is - in practice - more prone to be malformed. Some tools are designed specifically to work with HTML.
xml2::read_html() is a good first function to use for importing HTML. htmltools provides functions to create HTML elements. htmltab (GitHub) extracts structured information from HTML tables, similar to
XML::readHTMLTable of the XML package, but automatically expands row and column spans in the header and body cells, and users are given more control over the identification of header and body rows which will end up in the R table. The selectorgadget browser extension can be used to identify page elements. RHTMLForms reads HTML documents and obtains a description of each of the forms it contains, along with the different elements and hidden fields. scrapeR provides additional tools for scraping data from HTML documents. htmltidy (GitHub) provides tools to “tidy” messy HTML documents. htm2txt uses regex to converts html documents to plain text by removing all html tags. Rcrawler does crawling and scraping of web pages.
- RSS/Atom: feedeR can be used to parse RSS or Atom feeds. tidyRSS parses RSS, Atom XML/JSON and geoRSS into a tidy data.frame.
- swagger can be used to automatically generate functions for working with an web service API that provides documentation in Swagger.io format.
Tools for Working with URLs
httr::parse_url() function can be used to extract portions of a URL. The
utils::URLencode() functions can be used to encode character strings for use in URLs.
utils::URLdecode() decodes back to the original strings. urltools (GitHub) can also handle URL encoding, decoding, parsing, and parameter extraction.
- The jayjacobs/tldextract package extracts top level domains and subdomains from a host name. It’s a port of a Python library of the same name.
- iptools can facilitate working with IPv4 addresses, including for use in geolocation.
- urlshorteneR offers URL expansion and analysis for Bit.ly, Goo.gl, and is.gd. longurl uses the longurl.org API to provide similar functionality.
- gdns provides access to Google’s secure HTTP-based DNS resolution service.
Tools for Working with Scraped Webpage Contents
- Several packages can be used for parsing HTML documents. boilerpipeR provides generic extraction of main text content from HTML files; removal of ads, sidebars and headers using the boilerpipe Java library. RTidyHTML interfaces to the libtidy library for correcting HTML documents that are not well-formed. This library corrects common errors in HTML documents. W3CMarkupValidator provides an R Interface to W3C Markup Validation Services for validating HTML documents.
- For XML documents, the XMLSchema package provides facilities in R for reading XML schema documents and processing them to create definitions for R classes and functions for converting XML nodes to instances of those classes. It provides the framework for meta-computing with XML schema in R. xslt is an extension for the xml2 package to transform XML documents by applying an xslt style-sheet. (It can be seen as a modern replacement for Sxslt, which is an interface to Dan Veillard’s libxslt translator, and the SXalan package.) This may be useful for webscraping, as well as transforming XML markup into another human- or machine-readable format (e.g., HTML, JSON, plain text, etc.). SSOAP provides a client-side SOAP (Simple Object Access Protocol) mechanism. It aims to provide a high-level interface to invoke SOAP methods provided by a SOAP server. XMLRPC provides an implementation of XML-RPC, a relatively simple remote procedure call mechanism that uses HTTP and XML. This can be used for communicating between processes on a single machine or for accessing Web services from within R.
- Rcompression (not on CRAN): Interface to zlib and bzip2 libraries for performing in-memory compression and decompression in R. This is useful when receiving or sending contents to remote servers, e.g. Web services, HTTP requests via RCurl.
- tm.plugin.webmining: Extensible text retrieval framework for news feeds in XML (RSS, ATOM) and JSON formats. Currently, the following feeds are implemented: Google Blog Search, Google Finance, Google News, NYTimes Article Search, Reuters News Feed, Yahoo Finance and Yahoo Inplay.
- webshot uses PhantomJS to provide screenshots of web pages without a browser. It can be useful for testing websites (such as Shiny applications).
- securitytxt identifies and parses web Ssecurity policy files.
Other Useful Packages and Functions
- Email:: mailR is an interface to Apache Commons Email to send emails from within R. sendmailR provides a simple SMTP client. gmailr provides access the Google’s gmail.com RESTful API.
- Mocking:: webmockr is a library for stubbing and setting expectations on HTTP requests. It is inspired from Rubys
webmock. This package only helps mock HTTP requests, and returns nothing when requests match expectations. See Testing for mocking with returned responses.
- Testing:: vcr provides an interface to easily cache HTTP requests in R package test suites (but can be used outside of testing use cases as well). vcr relies on webmockr to do the HTTP request mocking. httptest provides a framework for testing packages that communicate with HTTP APIs, offering tools for mocking APIs, for recording real API responses for use as mocks, and for making assertions about HTTP requests, all without requiring a live connection to the API server at runtime.
- Miscellaneous: webutils contains various functions for developing web applications, including parsers for
application/x-www-form-urlencoded as well as
Web and Server Frameworks
- DeployR is part of Microsoft R Server that provides support for integrating R as an application and website backend.
- The shiny package makes it easy to build interactive web applications with R.
- Other web frameworks include: fiery that is meant to be more flexible but less easy to use than shiny (reqres and routr are utilities used by fiery that provide HTTP request and response classes, and HTTP routing, respectively); nteetor/prairie (not on CRAN) which is a lightweight web framework that uses magrittr-style syntax and is modeled after expressjs; att/rcloud provides an iPython notebook-style web-based R interface; and Rook, which contains the specification and convenience software for building and running Rook applications.
- The opencpu framework for embedded statistical computation and reproducible research exposes a web API interfacing R, LaTeX and Pandoc. This API is used for example to integrate statistical functionality into systems, share and execute scripts or reports on centralized servers, and build R based apps.
- Several general purpose server/client frameworks for R exist. Rserve and RSclient provide server and client functionality for TCP/IP or local socket interfaces. httpuv provides a low-level socket and protocol support for handling HTTP and WebSocket requests directly within R. Another related package, perhaps which httpuv replaces, is websockets. servr provides a simple HTTP server to serve files under a given directory based on httpuv.
- Several packages offer functionality for turning R code into a web API. jug is a simple API-builder web framework, built around httpuv. FastRWeb provides some basic infrastructure for this. plumber allows you to create a REST API by decorating existing R source code.
- The WADL package provides tools to process Web Application Description Language (WADL) documents and to programmatically generate R functions to interface to the REST methods described in those WADL documents. (not on CRAN)
- The RDCOMServer provides a mechanism to export R objects as (D)COM objects in Windows. It can be used along with the RDCOMClient package which provides user-level access from R to other COM servers. (not on CRAN)
- rapporter.net provides an online environment (SaaS) to host and run rapport statistical report templates in the cloud.
- radiant (GitHub) is Shiny-based GUI for R that runs in a browser from a server or local machine.
- seankross/neocities wraps the API for the Neocities web hosting service. (not on CRAN)
- The Tiki Wiki CMS/Groupware framework has an R plugin (PluginR) to run R code from wiki pages, and use data from their own collected web databases (trackers). A demo: https://r.tiki.org/tiki-index.php.
- The MediaWiki has an extension (Extension:R) to run R code from wiki pages, and use uploaded data. A mailing list used to be available: R-sig-mediawiki.
- whisker: Implementation of logicless templating based on Mustache in R. Mustache syntax is described in http://mustache.github.io/mustache.5.html
- CGIwithR (not on CRAN) allows one to use R scripts as CGI programs for generating dynamic Web content. HTML forms and other mechanisms to submit dynamic requests can be used to provide input to R scripts via the Web to create content that is determined within that R script.
Cloud Computing and Storage
- Amazon Web Services is a popular, proprietary cloud service offering a suite of computing, storage, and infrastructure tools. aws.signature provides functionality for generating AWS API request signatures.
- Simple Storage Service (S3) is a commercial server that allows one to store content and retrieve it from any machine connected to the Internet. aws.s3 is probably the best R client for S3. RAmazonS3 and robertzk/s3mpi (not on CRAN) provides basic infrastructure for communicating with S3. lalas/awsConnect (not on CRAN) is another package using the AWS Command Line Interface to control EC2 and S3, which is only available for Linux and Mac OS.
- Elastic Cloud Compute (EC2) is a cloud computing service. AWS.tools and lalas/awsConnect (not on CRAN) both use the AWS command line interface to control EC2. segue (not on CRAN) is another package for managing EC2 instances and S3 storage, which includes a parallel version of
lapply() for the Elastic Map Reduce (EMR) engine called
emrlapply(). It uses Hadoop Streaming on Amazon’s EMR in order to get simple parallel computation.
- Simple Notification Service (SNS) is a service for Pub/Sub messaging and mobile notifications for microservices, distributed systems, and serverless applications. aws.sns
- AWS Polly is a Text-to-Speech (TTS) cloud service that converts text into lifelike speech. aws.polly
- DBREST: RAmazonDBREST provides an interface to Amazon’s Simple DB API.
- The cloudyr project, which is currently under active development on GitHub, aims to provide a unified interface to the full Amazon Web Services suite without the need for external system dependencies.
- googleComputeEngineR interacts with the Google Compute Engine API, and lets you create, start and stop instances in the Google Cloud.
- Cloud Storage: googleCloudStorageR interfaces with Google Cloud Storage. boxr (GitHub) is a lightweight, high-level interface for the box.com API. rdrop2 is a Dropbox interface that provides access to a full suite of file operations, including dir/copy/move/delete operations, account information (including quotas) and the ability to upload and download files from any Dropbox account. backblazer (GitHub) provides access to the Backblaze B2 storage API.
- Docker: analogsea is a general purpose client for the Digital Ocean v2 API. In addition, the package includes functions to install various R tools including base R, RStudio server, and more. There’s an improving interface to interact with docker on your remote droplets via this package.
- crunch GitHub provides an interface to the crunch.io storage and analytics platform. crplyr GitHub implements
dplyr methods on top of Crunch, and crunchy GitHub facilitates making Shiny apps on Crunch.
- rrefine provides a client for the OpenRefine (formerly Google Refine) data cleaning service.
Document and Code Sharing
- Code Sharing: gistr (GitHub) works with GitHub gists (gist.github.com) from R, allowing you to create new gists, update gists with new files, rename files, delete files, get and delete gists, star and un-star gists, fork gists, open a gist in your default browser, get embed code for a gist, list gist commits, and get rate limit information when authenticated. git2r provides bindings to the git version control system and two packages provide access to the GitHub API: gh and cscheid/rgithub (not on CRAN), all of which can facilitate code or data sharing via GitHub. gitlabr is a GitLab-specific client. hrbrmstr/pastebin is a client for https://pastebin.com/ a code sharing site.
- Data archiving: dataverse (GitHub) provides access to Dataverse 4 APIs. rfigshare (GitHub) connects with Figshare.com. dataone provides read/write access to data and metadata from the DataONE network of Member Node data repositories. dataone (GitHub) provides a client for DataONE repositories.
- Google Drive/Google Documents: noamross/driver (not on CRAN) is a thin client for the Google Drive API. The RGoogleDocs package is an example of using the RCurl and XML packages to quickly develop an interface to the Google Documents API. RGoogleStorage provides programmatic access to the Google Storage API. This allows R users to access and store data on Google’s storage. We can upload and download content, create, list and delete folders/buckets, and set access control permissions on objects and buckets.
- Google Sheets: googlesheets (GitHub) can access private or public Google Sheets by title, key, or URL. Extract data or edit data. Create, delete, rename, copy, upload, or download spreadsheets and worksheets. gsheet (GitHub) can download Google Sheets using just the sharing link. Spreadsheets can be downloaded as a data frame, or as plain text to parse manually.
- imguR (GitHub) is a package to share plots using the image hosting service Imgur.com. knitr also has a function
imgur_upload() to load images from literate programming documents.
- cloudyr/rscribd (not on CRAN): API client for publishing documents to Scribd.
Data Analysis and Processing Services
- Crowdsourcing: Amazon Mechanical Turk is a paid crowdsourcing platform that can be used to semi-automate tasks that are not easily automated. MTurkR (GitHub)) provides access to the Amazon Mechanical Turk Requester API. cloudyr/microworkers (not on CRAN) can distribute tasks and retrieve results for the Microworkers.com platform.
- Geospatial/Geolocation/Geocoding: Several packages connect to geolocation/geocoding services. rgeolocate (GitHub) offers several online and offline tools. trestletech/rydn (not on CRAN) is an interface to the Yahoo Developers network geolocation APIs, and hrbrmstr/ipapi can be used to geolocate IPv4/6 addresses and/or domain names using the http://ip-api.com/ API. threewords connects to the What3Words API, which represents every 3-meter by 3-meter square on earth as a three-word phrase. opencage (GitHub) provides access to to the OpenCage geocoding service. geoparser (GitHub) interfaces with the Geoparser.io web service to identify place names from plain text. hrbrmstr/nominatim (not on CRAN) connects to the OpenStreetMap Nominatim API for reverse geocoding. ropensci/PostcodesioR (not on CRAN) provides post code lookup and geocoding for the United Kingdom. geosapi is an R client for the GeoSererver REST API, an open source implementation used widely for serving spatial data.
- Image Processing: cloudyr/RoogleVision (not on CRAN) links to the Google Cloud Vision image recognition service.
- Machine Learning as a Service: Several packages provide access to cloud-based machine learning services. AzureML links with the Microsoft Azure machine learning service. bigml (GitHub) connects to BigML. OpenML (GitHub) is the official client for the OpenML API. ddeploy wraps the Duke Analytics model deployment API. clarifai (GitHub) is a Clarifai.com client that enables automated image description. rLTP (GitHub) accesses the ltp-cloud service. languagelayeR is a client for Languagelayer, a language detection API. googlepredictionapi (not on CRAN): is an R client for the Google Prediction API, a suite of cloud machine learning tools. yhatr lets you deploy, maintain, and invoke models via the Yhat REST API. datarobot works with Data Robot’s predictive modeling platform. mscsweblm4r (GitHub) interfaces with the Microsoft Cognitive Services Web Language Model API and mscstexta4r (GitHub) uses the Microsoft Cognitive Services Text Analytics REST API. rosetteApi links to the Rosette text analysis API. birdnik (GitHub) provides an interface to Wordnik, an online dictionary. googleLanguageR provides interfaces to Google’s Cloud Translation API, Natural Language API, Cloud Speech API, and the Cloud Text-to-Speech API.
- Machine Translation: translate provides bindings for the Google Translate API v2 and translateR provides bindings for both Google and Microsoft translation APIs. chainsawriot/mstranslator] provides an R wrapper for the Microsoft Translator API. RYandexTranslate (GitHub) connects to Yandex Translate. transcribeR provides automated audio transcription via the HP IDOL service.
- Document Processing: abbyyR GitHub and captr (GitHub) connect to optical character recognition (OCR) APIs. pdftables (GitHub) uses the PDFTables.com webservice to extract tables from PDFs.
- Online Surveys: jbryer/qualtrics (not on CRAN) provide functions to interact with Qualtrics. WufooR (GitHub) can retrieve data from Wufoo.com forms. redcapAPI (GitHub) can provide access to data stored in a REDCap (Research Electronic Data CAPture) database, which is a web application for building and managing online surveys and databases developed at Vanderbilt University. rubenarslan/formr facilitates use of the formr survey framework, which is built on openCPU. Rexperigen is a client for the Experigen experimental platform.
Social Media Clients
- plusser has been designed to to facilitate the retrieval of Google+ profiles, pages and posts. It also provides search facilities. Currently a Google+ API key is required for accessing Google+ data.
- Rfacebook and facebook.S4 provide interfaces to the Facebook API.
- The Rflickr package provides an interface to the Flickr photo management and sharing application Web service. (not on CRAN)
- instaR (GitHub) is a client for the Instagram API.
- mpiccirilli/Rlinkedin (not on CRAN) is a client for the LinkedIn API. Auth is via OAuth.
- rpinterest connects to the Pintrest API.
- SocialMediaMineR is an analytic tool that returns information about the popularity of a URL on social media sites.
- tumblR (GitHub) is a client for the Tumblr API (https://www.tumblr.com/docs/en/api/v2). Tumblr is a microblogging platform and social networking website https://www.tumblr.com/.
- vkR is a client for VK, a social networking site based in Russia.
- rladies/meetupr is a client for the Meetup.com API.
- Twitter: twitteR (GitHub) provides an interface to the Twitter web API. It claims to be deprecated in favor of rtweet (GitHub). joyofdata/RTwitterAPI (not on CRAN) is another Twitter client. gvegayon/twitterreport (not on CRAN) focuses on report generation based on Twitter data. streamR provides a series of functions that allow users to access Twitter’s filter, sample, and user streams, and to parse the output into data frames. OAuth authentication is supported. tweet2r is an alternative implementation geared toward SQLite and postGIS databases. graphTweets produces a network graph from a data.frame of tweets. tweetscores (not on CRAN) implements a political ideology scaling measure for specified Twitter users.
Web Analytics Services
- Google Trends: gtrendsR offers functions to perform and display Google Trends queries. RGoogleTrends provides an alternative.
- Google Analytics: googleAnalyticsR, ganalytics; GAR , and RGA provide functions for accessing and retrieving data from the Google Analytics APIs. The latter supports OAuth 2.0 authorization. RGA provides a shiny app to explore data. searchConsoleR links to the Google Search Console (formerly Webmaster Tools).
- Online Advertising: fbRads can manage Facebook ads via the Facebook Marketing API. WillemPaling/RDoubleClick (not on CRAN) can retrieve data from Google’s DoubleClick Campaign Manager Reporting API. RSmartlyIO (GitHub) loads Facebook and Instagram advertising data provided by Smartly.io.
- Other services: RSiteCatalyst has functions for accessing the Adobe Analytics (Omniture SiteCatalyst) Reporting API.
- RAdwords (GitHub) is a package for loading Google Adwords data.
- webreadr (GitHub) can process various common forms of request log, including the Common and Combined Web Log formats and AWS logs.
Web Services for R Package Development
- R-Hub http://log.r-hub.io/ is a project to enable package builds across all architectures. rhub is a package that interfaces with R-Hub to allow you to check a package on the platform.
Other Web Services
- Fitness Apps: fitbitScraper (GitHub) retrieves Fitbit data. RGoogleFit provides similar functionality for Google Fit.
Push Notifications: RPushbullet provides an easy-to-use interface for the Pushbullet service which provides fast and efficient notifications between computers, phones and tablets. pushoverr (GitHub) can sending push notifications to mobile devices (iOS and Android) and desktop using Pushover. notifyme (GitHub) can control Phillips Hue lighting.
Reference/bibliography/citation management: RefManageR imports and manage BibTeX and BibLaTeX references with RefManager. rorcid (GitHub) is a programmatic interface the Orcid.org API, which can be used for identifying scientific authors and their publications (e.g., by DOI). rdatacite connects to DataCite, which manages DOIs and metadata for scholarly datasets. scholar provides functions to extract citation data from Google Scholar. Convenience functions are also provided for comparing multiple scholars and predicting future h-index values. mathpix convert an image of a formula (typeset or handwritten) via Mathpix webservice to produce the LaTeX code.
Literature: rplos is a programmatic interface to the Web Service methods provided by the Public Library of Science journals for search. rOpenHealth/rpubmed (not on CRAN) provides tools for extracting and processing Pubmed and Pubmed Central records, and europepmc connects to the Europe PubMed Central service. pubmed.mineR is a package for text mining of PubMed Abstracts that supports fetching text and XML from PubMed. aRxiv is a client for the arXiv API, a repository of electronic preprints for computer science, mathematics, physics, quantitative biology, quantitative finance, and statistics. roadoi provides an interface to the Unpaywall API for finding free full-text versions of academic papers. rcoreoa is an interface to the CORE API, a search interface for open access scholarly articles. rcrossref is an interface to Crossref’s API, crminer extracts full text from scholarly articles retrieved via Crossref’s Text and Data Mining service; and fulltext is a general purpose package to search for, retrieve and extract full text from scholarly articles.
Automated Metadata Harvesting: oai and OAIHarvester harvest metadata using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) standard. ropenscilabs/rresync is a client for the ResourceSync framework, a sort of replacement for OAI-PMH.
- Wikipedia: WikipediR (GitHub) is a wrapper for the MediaWiki API, aimed particularly at the Wikimedia ‘production’ wikis, such as Wikipedia. chgrl/rwikidata and WikidataR (GitHub) can request data from Wikidata.org, the free knowledgebase. wikipediatrend (GitHub) provides access to Wikipedia page access statistics. WikiSocio can retrieve contributor lists and revision data. WikidataQueryServiceR is a client for the Wikidata Query Service.
- bigrquery (GitHub): An interface to Google’s bigquery.
- colourlovers (GitHub) extracts colors and multi-color patterns from COLOURlovers, for use in creating R graphics color palettes.
- cymruservices queries Team Cymru web security services.
- datamart: Provides an S4 infrastructure for unified handling of internal datasets and web based data sources. Examples include dbpedia, eurostat and sourceforge.
- discgolf (GitHub) provides a client to interact with the API for the Discourse web forum platform. The API is for an installed instance of Discourse, not for the Discourse site itself.
- rdpla ((GitHub)[https://github.com/ropensci/rdpla]) works with the Digital Public Library of America API.
- factualR: Thin wrapper for the Factual.com server API.
- HIBPwned is a client for Have I Been Pwned.
- internetarchive: API client for internet archive metadata.
- hrbrmstr/irced (not on CRAN) is an IRC chat client.
- jSonarR: Enables users to access MongoDB by running queries and returning their results in data.frames. jSonarR uses data processing and conversion capabilities in the jSonar Analytics Platform and the JSON Studio Gateway, to convert JSON to a tabular format.
- LendingClub connects with the LendingClub API.
- livechatR is a client for the LiveChat API.
- lucr performs currency conversions using Open Exchange Rates.
- stephlocke/mockaRoo (not on CRAN) uses the MockaRoo API to generate mock or fake data based on an input schema.
- pivotaltrackR provides an interface to the API for Pivotal Tracker, an agile project management tool.
- randNames (GitHub) generates random names and personal identifying information using the https://randomapi.com/ API.
- Rblpapi (GitHub) is a client for Bloomberg Finance L.P. ROpenFIGI (GitHub) provides an interface to Bloomberg’s OpenFIGI API.
- rerddap: A generic R client to interact with any ERDDAP instance, which is a special case of OPeNDAP (https://en.wikipedia.org/wiki/OPeNDAP), or Open-source Project for a Network Data Access Protocol. Allows user to swap out the base URL to use any ERDDAP instance.
- hmalmedal/ripplerestr provides an interface to the Ripple protocol for making financial transactions.
- refimpact connects to the UK Research Excellence Framework 2014 Impact Case Studies Database API.
- restimizeapi provides an interface to trading website estimize.com.
- RForcecom: RForcecom provides a connection to Force.com and Salesforce.com.
- dsidavis/Rgoodreads (not on CRAN) interacts with Goodreads.
- Two packages, owmr and ROpenWeatherMap, work with the Open Weather Map API.
- RSauceLabs (GitHub) connects to SauceLabs.
- RSocrata access data for Socrata open data portals. soql is a pipe-oriented set of tools for constructing Socrata queries.
- RStripe provides an interface to Stripe, an online payment processor.
- RZabbix links with the Zabbix network monitoring service API.
- rwars retrieve and reformat data from the Star Wars API (SWAPI).
- slackr (GitHub) is a client for Slack.com messaging platform.
- dmpe/SlideShaRe (not on CRAN) is a client for Slideshare.
- dgrtwo/stackr (not on CRAN): An unofficial wrapper for the read-only features of the Stack Exchange API.
- telegram (GitHub) connects with the Telegram Bot API.
- trelloR (GitHub) connects to the Trello API.
- tuber is a YouTube API client and tubern is a client for the YouTube Analytics and Reporting API
- ubeR is an interface to the Uber API.
- udapi connects to Urban Dictionary.
- nealrichardson/useRsnap (not on CRAN) provides an interface to the API for Usersnap, a tool for collecting feedback from web application users.
- yummlyr (GitHub) provides an interface to the Yummly recipe database.
- zendeskR: This package provides a wrapper for the Zendesk API.
- ZillowR is a client for the Zillow real estate service.
- docuSignr provides an interface to the DocuSign Rest API.
- giphyr is an R interface to the Giphy API for GIF’s
duckduckr is an R interface DuckDuckGo’s Instant Answer API