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api

Advanced API Tester

Professional API testing tool for REST, GraphQL, SOAP, and WebSocket APIs with full authentication support

http REST API schema GraphQL security Authentication timeline WebSocket

API Request Configuration

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Query Parameters

API Response

Status: Not sent
Time: -
Size: -
JSON 
{
  "message": "Send a request to see the response here"
}

Request History

history

No recent requests

Environment Variables

Variables

Use variables in requests: {{baseUrl}}/posts

Code Generation

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Generated Code 
// Configure your request first

Quick Actions

Sample APIs for Testing

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JSONPlaceholder

Fake REST API for testing and prototyping

schema

GraphQL Countries

GraphQL API with country data

bolt

WebSocket Echo

WebSocket server for real-time testing

Advanced API Testing Features

security

Full Auth Support

OAuth 2.0, JWT, API Keys, Basic Auth, Bearer Tokens, and custom headers

timeline

Performance Metrics

Detailed timing breakdown with DNS, TCP, TLS, and response time analysis

code

Code Generation

Generate code snippets in 10+ languages from your API requests

psychology

Automated Testing

Write and run JavaScript tests to validate API responses automatically

Why Use Our Advanced API Tester?

In today's API-driven development world, testing APIs efficiently is crucial for building reliable applications. Our Advanced API Tester provides everything developers need in one tool:

Key Features

  • check_circle Multi-Protocol Support: REST, GraphQL, SOAP, WebSocket, and gRPC
  • check_circle Complete Authentication: OAuth 2.0, JWT, API Keys, Basic Auth, Digest Auth
  • check_circle Environment Variables: Manage different configurations for development, staging, production
  • check_circle Advanced Testing: Write custom JavaScript tests with Chai assertion library
  • check_circle Code Generation: Generate API client code in 10+ programming languages
  • check_circle Performance Analytics: Detailed timing metrics and waterfall charts

Common Use Cases

  • API Development: Test endpoints during development and debugging
  • Integration Testing: Verify third-party API integrations work correctly
  • Documentation: Generate example code for API documentation
  • Monitoring: Create automated API health checks and monitors
  • Security Testing: Test API security with different authentication methods