APITester - Build, Test & Debug API Requests (REST, GraphQL, WebSockets)

API Request Builder & Tester

Test REST, GraphQL and WebSocket endpoints with ease

URL
Query Parameters
Key
Value
Headers
Request Body
Response
Status: Not sent Time: 0ms
Select a language to generate code

Key Features

Multiple Protocol Support

Test REST, GraphQL and WebSocket APIs all in one tool.

Authentication

Supports API keys, OAuth, JWT and other auth methods.

Code Generation

Generate code snippets in multiple languages.

How to Use This API Tester

1

Configure Your Request

  • Enter your API endpoint URL
  • Select HTTP method (GET, POST, etc.)
  • Add headers, parameters or body as needed
  • Switch between REST, GraphQL and WebSocket modes
2

Send & Inspect

  • Click "Send" to make the request
  • View response status, time and data
  • Check headers and cookies in separate tabs
  • Switch between pretty and raw view modes
3

Generate & Share

  • Generate code snippets for your API calls
  • Save requests for later use
  • Share your API configurations with teammates
  • Export/import your API collection

APITester

Free online tool for testing and debugging APIs.

Quick Links

Home Features How to Use

Supported Protocols

REST GraphQL WebSocket HTTP/HTTPS

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