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Online API Request Builder

Build and send HTTP requests visually, inspect the response, and generate fetch, axios, curl, or Python code.

Want to understand APIs from the ground up?

Our Internet Tools course covers HTTP, REST, headers, status codes, and how the web actually works.

presets:

No headers. Click Add to include request headers.

Free plan

to describe API requests in plain English. Included in the Free plan.

const response = await fetch('https://jsonplaceholder.typicode.com/users');

const data = await response.json();
console.log(data);
HTTP Methods Reference
GET
Retrieve a resource. No body. Safe & idempotent.
Typical: 200 OK
POST
Create a new resource. Has body. Not idempotent.
Typical: 201 Created
PUT
Replace a resource entirely. Has body. Idempotent.
Typical: 200 OK
PATCH
Partially update a resource. Has body. Not always idempotent.
Typical: 200 OK
DELETE
Remove a resource. Usually no body. Idempotent.
Typical: 204 No Content
Common Headers

About this tool

API Request Builder

An API request builder lets you construct and send HTTP requests without writing any code. Choose the method (GET, POST, PUT, DELETE, and more), add headers, query parameters, and a request body, then send it and inspect the response status, headers, and payload.

Once a request works, generate the equivalent code in fetch, axios, curl, or Python so you can drop it straight into your project. It is free on the HACKUP Free plan.

Frequently asked questions

API Request Builder FAQ

What is an API request builder?
It is a visual tool for composing and sending HTTP requests - setting the method, headers, query params, and body - and inspecting the response, similar to a lightweight Postman in the browser.
Which HTTP methods are supported?
All common methods are supported, including GET, POST, PUT, PATCH, and DELETE, with full control over headers and request body.
Can it generate code from a request?
Yes. After building a request you can export it as ready-to-use code in fetch, axios, curl, or Python.
Do I need an account to use it?
No account is required to try it. The API request builder is included in the HACKUP Free plan.