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R web API framework for building high-performance microservices and app backends
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RestRserve is an R web API framework for building high-performance AND robust microservices and app backends. With Rserve backend on UNIX-like systems it is parallel by design. It will handle incoming requests in parallel - each request in a separate fork (all the credits should go to Simon Urbanek).

Quick start

Creating application is as simple as:

app = Application$new()
  path = "/hello", 
  FUN = function(request, response) {
    response$set_body("Hello from RestRserve")
backend = BackendRserve$new()
backend$start(app, http_port = 8080)

Now you can type http://localhost:8080/hello in your favourite browser and see (surprisingly!) Hello from RestRserve.

Learn RestRserve


  • Easy to install, small number of dependencies
  • Fully featured http server with the support for URL encoded and multipart forms
  • Build safe and secure applications - RestRserve supports https, provides building blocks for basic/token authentication
  • Concise and intuitive syntax
  • Raise meaningful http errors and allows to interrupt request handling from any place of the user code
  • Comes with many examples - see inst/examples
  • Saves you from boilerplate code:
    • automatically decodes request body from the common formats
    • automatically encodes response body to the common formats
    • automatically parses URI templates (such as /get/{item_id})
    • helps to expose OpenAPI and Swagger/Redoc/Rapidoc UI
  • It is fast!


From source



Automated docker builds from docker-hub:


Guidelines for filing issues / pull requests -


  • Simon Urbanek (@s-u) for awesome Rserve and all the work on R itself and on his other packages
  • Jeff Allen (@trestletech) for his work on Swagger UI in plumber (from where we took inspiration for our implementation)
  • Brodie Gaslam (@brodieG) for help with understanding on how to get traceback from try-catch function calls. Also thanks Hadley Wickham (@hadley) for evaluate::try_capture_stack function which we use for this purpose.

Known limitations

  • RestRserve is primarily tested on UNIX systems. While it works natively on Windows please don't expect it to be as performant as on UNIX-like systems. If you really want to use it on Windows - consider to try Windows Subsystem for Linux and report back.
  • Keep in mind that every request is handled in a separate process (fork from a parent R session). While this feature allows to handle requests in parallel it also restricts reuse of certain objects which are not fork-safe (notably database connections, rJava objects, etc)

Related projects

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