Online REST & SOAP API Testing Tool

ReqBin is an online API testing tool for REST and SOAP APIs. Test API endpoints by making API requests directly from your browser. Test API responses with built-in JSON and XML validators. Load test your API with hundreds of simulated concurrent connections. Generate code snippets for API automation testing frameworks. Share and discuss your API requests online.
API Testing Made Easy

ReqBin API Tester is a free online API testing tool. Test your API, website or web service by sending REST, SOAP and HTTP API requests right from your browser, and check the server responses.

  • Test APIs, websites and web services online
  • Post requests directly from your browser
  • Share and discuss your requests online
  • Load test APIs and websites
  • Generate PHP, Python, JavaScript/AJAX, Java, C#/.NET, and Curl/Bash code snippets for your requests
  • Built-in JSON, XML, HTML and CSS validators
ReqBin API testing tool provides millisecond precision timings for API requests. Run API tests and find performance bottlenecks in your API.

ReqBin API test nodes are located in the US and EU, which you can use to compare API performance metrics for users across geographic regions.
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What is API?

API (Application Programming Interface) is a computing interface that defines how software components interact with each other. It is a way of programmatically interacting with a separate software component or resource and expose functionality for internal or external use and testing. API defines what requests can be made, how they will be made and hides complexity from developers. API extends systems to partners, organizes code, and makes components reusable.

What is API testing?

API testing is a set of quality assurance actions that include making calls to an API endpoint, getting API responses, and validating API status codes, response times, and data against predefined rules. API testing is usually performed by a software tool or web service and mainly focuses on testing the business logic layer.

Why is API Testing Important?

API testing determines whether the API meets expectations for functionality, reliability, performance, and security. API testing is essential for the entire development, implementation and maintenance of APIs. API testing is necessary to accompany the API to make it functional and ready for its purpose.

How do I Test API Online?

You can test API online by composing and executing various API requests right from your browser. To test API online:
1. Enter the URL of the API endpoint and select the appropriate HTTP method.
2. In the Content tab, enter the data you want to send to the API endpoint.
3. If your API server requires authorization, enter your credentials in the Authorization tab.
4. Click Send to submit your API request, check the returned API status code, response time, and content.
5. Re-run the API tests by changing the API endpoint URL, HTTP method, and request data.

Test API with Online REST API Client

ReqBin is the most popular Online REST API testing tool. You can quickly and easily test your API by sending API requests to REST API endpoints directly from your browser. ReqBin API Tester provides millisecond accurate timings for API requests and server responses. With the ReqBin load testing tool, you can test the API against hundreds of simulated concurrent users from different geographic regions.
The REST API client works right in your browser. No coding. No desktop app. Fully online.

JSON and XML API Tester

Easily inspect returned JSON and XML responses. The built-in JSON and XML formatters automatically format and validate the returned data and highlight any errors in JSON and XML.

REST API Examples

Learn REST API best practices by browsing a collection of real-world REST API examples.