REST Assured review
A focused, open-source Java library for code-based REST API testing.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
REST Assured is an open-source Java DSL for testing REST-based services. It is designed for Java developers and QA engineers who want to construct HTTP requests, send them to services, and validate results inside automated tests. The library supports standard and arbitrary HTTP methods, query, form, path, and multipart parameters, plus request and response headers, cookies, status codes, and content. It is distributed as Java dependencies through Maven or Gradle, making it a code-centric option rather than a hosted API testing workspace.
Its strongest area is detailed request and response handling. Developers can extract values with JsonPath, XmlPath, and HtmlPath; validate JSON responses against JSON Schema; serialize request objects; deserialize response bodies with object mappers; and log request and response details. OAuth 1 and OAuth 2 signing are supported through Scribe. These capabilities suit test suites that need assertions close to application code, particularly when response structure and authentication behavior require precise checks.
The ecosystem fit is centered on JVM development. Support modules cover Spring MVC, Spring Web Test Client, Kotlin, and Scala, while the self-hosted distribution works through standard Java build dependencies. REST Assured should appeal to teams that want a free, open-source library embedded in automated tests and are comfortable managing execution through their own development workflow. Teams seeking a hosted interface, built-in mock servers, recurring schedules, contract testing, or broader protocol coverage should choose a more expansive API testing product.
REST Assured pros and cons
- Where it wins
- Detailed HTTP request and response configuration
- JSON Schema validation and response value extraction
- OAuth 1 and OAuth 2 support through Scribe
- Where it doesn't
- Self-hosted library rather than a hosted test-management service
- Focused on REST-based HTTP testing
- No built-in mock servers or recurring test schedules
REST Assured fact sheet, pricing and score →
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