Testing and validation of REST services in Java is harder than in dynamic languages such as Ruby and Groovy. REST Assured brings the simplicity of using these languages into the Java domain.

• 2025-05-22: REST Assured 5.5.5 is released that fixes problems with rest-assured-bom file after moving to new deployment method. See change log for more details.
• 2025-05-22: REST Assured 5.5.3 is released with improved cookie handling when using CSRF cookie propagation. See change log for more details.
• 2025-05-14: REST Assured 5.5.2 is released with bug fixes and minor improvements. See change log for more details.

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Here's an example of how to make a GET request and validate the JSON or XML response:

get("/lotto").then().assertThat().body("lotto.lottoId", equalTo(5));

Get and verify all winner ids:

get("/lotto").then().assertThat().body("lotto.winners.winnerId", hasItems(23, 54));

Using parameters:

given().
    param("key1", "value1").
    param("key2", "value2").
when().
    post("/somewhere").
then().
    body(containsString("OK"));

Using X-Path (XML only):

given().
    params("firstName", "John", "lastName", "Doe").
when().
    post("/greetMe").
then().
    body(hasXPath("/greeting/firstName[text()='John']")).

Need authentication? REST Assured provides several authentication mechanisms:

given().auth().basic(username, password).when().get("/secured").then().statusCode(200);

Getting and parsing a response body:

// Example with JsonPath
String json = get("/lotto").asString();
List<String> winnerIds = from(json).get("lotto.winners.winnerId");
    
// Example with XmlPath
String xml = post("/shopping").andReturn().body().asString();
Node category = from(xml).get("shopping.category[0]");

REST Assured supports any HTTP method but has explicit support for POST, GET, PUT, DELETE, OPTIONS, PATCH and HEAD and includes specifying and validating e.g. parameters, headers, cookies and body easily.

• Getting started
• Usage Guide (click here for legacy documentation)
• Javadoc
• Rest Assured Javadoc
• Rest AssuredMockMvc Javadoc
• XmlPath Javadoc
• JsonPath Javadoc
• Release Notes
• FAQ

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• Change log
• REST Assured on openhub
• Mailing list for questions and support