API Request Builder

What is the API Request Builder?

The API Request Builder is a visual tool for composing HTTP API requests and generating ready-to-use code snippets in six popular languages. Instead of manually writing fetch calls, cURL commands, or requests library code, you fill in the method, URL, headers, query parameters, body, and authentication — and the tool instantly generates clean, copy-paste-ready code. It does not execute requests (avoiding CORS issues); it strictly builds the code for you to run in your own environment.

How to Use This Tool

1. Select the HTTP method (GET, POST, PUT, PATCH, DELETE).
2. Enter the API URL you want to call.
3. Add any headers or query parameters as key-value pairs.
4. For POST, PUT, or PATCH requests, enter the request body in JSON format.
5. Configure authentication if needed: Bearer token, Basic auth, or API key.
6. Choose your target language from the tabs: cURL, JavaScript, Python, Node.js, PHP, or Go.
7. Click Copy to grab the generated code.

Import from cURL

If you already have a cURL command (from browser DevTools, API documentation, or a colleague), click “Import cURL” and paste it. The tool will parse the method, URL, headers, body, and authentication and populate all fields automatically.

Supported Code Languages

• cURL — the universal command-line HTTP client.
• JavaScript (fetch) — native browser and Node.js 18+ fetch API.
• Python (requests) — the most popular Python HTTP library.
• Node.js (axios) — widely used Node.js HTTP client with promise support.
• PHP (curl) — PHP's built-in cURL extension.
• Go (net/http) — Go's standard library HTTP client.

Tips and Best Practices

• This tool does not execute requests — it only generates code. Run the code in your terminal, browser console, or application.
• Use the Import cURL feature to quickly replicate requests from browser DevTools (“Copy as cURL”).
• Toggle individual headers or query parameters on/off without deleting them.
• All processing happens in your browser — API keys and tokens you enter never leave your device.
• For complex JSON bodies, format them in a JSON formatter first, then paste here.