HTTP Request Tool Professional API Testing & Development Client

Send HTTP requests with comprehensive method support, custom headers, authentication, and advanced response handling. Features JSON tree view, server-sent events (SSE) streaming, and request history. Perfect for API development, testing, and debugging workflows.

🌐 All HTTP Methods

📊 JSON Tree View

🔒 Authentication Support

📥 Download DevHelper 👀 See Features

DevHelper HTTP Request Tool Screenshot showing API testing with JSON response and request headers

Advanced HTTP Request Features

Everything you need for professional API testing, development, and debugging workflows.

🌐

Complete HTTP Method Support

Send GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS requests with full parameter and body support. Perfect for testing RESTful APIs and web services.

📊

JSON Tree Viewer

Beautiful JSON response viewer with collapsible tree structure, syntax highlighting, and easy navigation through complex nested data structures.

🔒

Authentication Support

Built-in support for Bearer tokens, Basic Auth, API keys, and custom authentication headers. Secure credential management for API testing.

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Server-Sent Events (SSE)

Real-time streaming support for server-sent events with live event display. Test streaming APIs, webhooks, and real-time data feeds.

🎯

Custom Headers

Add unlimited custom HTTP headers with key-value pairs. Support for Content-Type, Accept, CORS headers, and any custom API requirements.

📝

Request History

Automatic request history tracking with quick recall functionality. Save time by reusing previous requests and building on tested API calls.

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Response Details

Comprehensive response information including status codes, headers, timing data, and content size. Full debugging information at your fingertips.

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Request Body Editor

Advanced request body editor with JSON, XML, form data, and raw text support. Syntax highlighting and validation for structured data formats.

Supported HTTP Methods

Full support for all standard HTTP methods with detailed explanations and use cases

GET

GET Requests

Retrieve data from APIs, test endpoints, and fetch resources. Perfect for reading operations, data queries, and API exploration without side effects.

POST

POST Requests

Create new resources, submit form data, and send JSON payloads. Essential for user registration, data creation, and file uploads.

PUT

PUT Requests

Update entire resources with complete replacement. Ideal for editing user profiles, updating configuration, and replacing data records.

PATCH

PATCH Requests

Partial resource updates with specific field modifications. Perfect for incremental changes, status updates, and selective data editing.

DELETE

DELETE Requests

Remove resources and clean up data. Essential for user account deletion, content removal, and resource management operations.

OPTIONS

OPTIONS Requests

Check available methods and CORS policies. Important for preflight requests, API capability discovery, and cross-origin testing.

HEAD

HEAD Requests

Get response headers without body content. Useful for checking resource existence, metadata retrieval, and bandwidth-efficient testing.

How to Use HTTP Request Tool

Send API requests and test endpoints in just a few simple steps.

Configure Request

Enter your API endpoint URL, select HTTP method (GET, POST, PUT, etc.), and configure any required headers or authentication.

Add Headers & Auth

Set custom headers, authentication tokens, Content-Type, and any other required headers for your API endpoint.

Prepare Request Body

For POST/PUT/PATCH requests, add your JSON, XML, or form data in the request body editor with syntax highlighting.

Send & Analyze

Send the request and view the response with JSON tree view, status codes, headers, and timing information for analysis.

Perfect for These Development Tasks

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API Development & Testing

Test REST APIs during development, validate endpoints, check response formats, and debug API behavior with comprehensive request/response analysis.

🔍

API Integration

Integrate third-party APIs by testing authentication, exploring endpoints, validating data formats, and understanding API capabilities before implementation.

🐛

Debugging & Troubleshooting

Debug API issues, test different request parameters, analyze error responses, and validate authentication mechanisms during development.

📊

Data Validation

Validate API responses, test data schemas, verify JSON structures, and ensure data consistency across different API endpoints.

🔒

Authentication Testing

Test various authentication methods including Bearer tokens, Basic Auth, API keys, and OAuth flows to ensure secure API access.

📡

Real-time API Testing

Test streaming APIs, webhooks, server-sent events, and real-time data feeds with live event monitoring and response tracking.

Frequently Asked Questions

What authentication methods are supported?

DevHelper supports Bearer tokens, Basic Authentication, API keys in headers, and custom authentication schemes. You can add any custom headers needed for your API's authentication requirements.

Can I test GraphQL APIs?

Yes! You can send GraphQL queries using POST requests with the appropriate Content-Type header and GraphQL query in the request body. The JSON tree view makes it easy to explore GraphQL responses.

How does the JSON tree viewer work?

The JSON tree viewer automatically parses JSON responses and displays them in a collapsible, hierarchical tree structure with syntax highlighting, making it easy to navigate complex nested data.

Can I save and reuse requests?

Yes, DevHelper automatically tracks your request history, allowing you to quickly recall and reuse previous requests. This saves time when testing similar endpoints or iterating on API calls.

What is Server-Sent Events (SSE) support?

SSE support allows you to test streaming APIs that send real-time data. You can monitor live events, webhooks, and continuous data streams with real-time display of incoming messages.

Can I test local development APIs?

Absolutely! DevHelper can send requests to localhost, development servers, and any accessible API endpoints. Perfect for testing APIs during local development and staging environments.