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<iframe src="https://devtoolbox.dedyn.io/tools/api-request-builder" width="100%" height="900" frameborder="0" title="API Request Builder"></iframe>

API Request Builder

Build HTTP requests visually, test them, and generate code in cURL, fetch, Python, and HTTPie.

Presets:
Query Parameters
Request Headers
Generated Code

                    

                    

                        

                    

                    

                        

                    

                    

                        

                    

                

            

        

    

    


    

        
Frequently Asked Questions

        

            What is an API request builder?▼
            
An API request builder is a tool that lets you visually construct HTTP requests by specifying the method, URL, headers, query parameters, and body. It can generate equivalent code in cURL, JavaScript fetch, Python requests, and HTTPie, and can also send the request directly from your browser.

        

        

            Can I test APIs directly from the browser?▼
            
Yes, this tool uses the browser's fetch API to send requests. However, browser CORS policies may block some cross-origin requests. APIs that include CORS headers (like JSONPlaceholder) will work fine. For APIs without CORS support, use the generated cURL or Python code in your terminal.

        

        

            What code formats can this tool generate?▼
            
The API Request Builder generates code in four formats: cURL commands for terminal use, JavaScript fetch() for frontend or Node.js projects, Python requests library code, and HTTPie commands for a more human-friendly CLI experience.

        

        

            Is my API data safe when using this tool?▼
            
Yes. All request building and code generation happens entirely in your browser. No data is sent to our servers. When you click Send Request, the request goes directly from your browser to the target API.

        

        

            What are query parameters and how do I add them?▼
            
Query parameters are key-value pairs appended to the URL after a '?' character (e.g., ?page=1&limit=10). This tool provides a visual editor where you can add, edit, and remove query parameters without manually editing the URL string.

        

    


    

        
Related Resources

        

            
REST API Design Guide
Best practices for designing clean, scalable REST APIs.

            
API Testing Guide
Complete guide to testing APIs effectively.

            
HTTP Request Tester
Quick HTTP tester with auth support.

            
JSON Formatter
Format and validate JSON responses.

            
HTTP Methods Cheat Sheet
Quick reference for all HTTP methods.

            
REST API Cheat Sheet
Status codes, headers, and conventions.

        

    


    

    
    

        
        

            
Keyboard Shortcuts

            

                Ctrl+Enter Send Request

                Ctrl+Shift+C Copy cURL

                Ctrl+L Clear All