Coding assistance for REST development

Besides the common Web services support, IntelliJ IDEA provides the following facilities for developing RESTful Web services:

Code Inspection and Quick Fixes

IntelliJ IDEA supports code inspections and suggests quick fixes in the following cases:

Issue	Default Quick Fix
Inconsistency between a method annotation and the method return type: a `@GET` annotated method returns void value.	Change to String.
Resource methods errors.	Remove `@Path` annotation.
Incorrect parameter type.	Validation for parameters annotated with `@QueryParam` or `@PathParam` annotations.
`@DefaultValue` issues.	@GET public String get(@DefaultValue("33.5") @QueryParam("str") int str) { return "Hello"; } `DefaultValue` is marked red with the description "Can't convert to int".
Rest `@Path` and `@PathParam` annotations inspections.
Rest References resolve problems.	References in `@PathParam` annotations are resolved to templates in `@Path` annotations
This method should have only one HTTP method designator.	Example: @GET @POST public String get(){ return "Hello"; } `@POST` is marked red.

The dedicated HTTP Client provides the following facilities for working with HTTP requests:

Gutter icons for request method designator annotations, such as @GET, @PUT, @POST, or @DELETE to quickly compose and execute requests.
Displaying server responses and the executed requests history
Completing the HTTP request parts from the @Path and @Produces annotations specified in the Java code

Change in the Java code	Change in the HTTP request in editor
`@Path` annotation is updated.	The contents of the `Request-URI` suggestion list change when you invoke code completion `Ctrl+Space`.
`@Produces` annotation is updated.	The contents of the `Accept` header field suggestion list change when you invoke code completion `Ctrl+Space`.

10 August 2026