API Request Builder
Build an HTTP/API request visually - method, URL, query parameters, headers, and body - and get the equivalent cURL command and JavaScript fetch snippet.
Configure a request below - method, URL, query parameters, headers, and body - and this tool generates the matching cURL command and JavaScript fetch snippet, ready to copy into your terminal or code.
This is a construction tool - it builds the request representation but does not send it. Use the REST API Tester if you want to actually send the request and see a live response.
What Is an API Request Builder?
An API request builder is a visual form for assembling the pieces of an HTTP request - the method, target URL, query parameters, headers, and body - without hand-writing the raw request syntax yourself. Instead of remembering exact cURL flag order or fetch() option names, you fill in fields and the tool generates the equivalent code.
Why Use This Tool?
It is useful whenever you need to hand a teammate a ready-to-run request, document an API call for a README, or quickly turn a set of parameters into working code without opening a full API client. It is a lightweight alternative for the common case of "I know what request I want, I just need it in a copyable form."
How to Use the API Request Builder
- Choose an HTTP method (GET, POST, PUT, PATCH, DELETE, HEAD, or OPTIONS).
- Enter the target URL.
- Add any query parameters as key/value rows - they are appended to the URL automatically.
- Add any request headers as key/value rows.
- For methods that support a body, choose a content type and enter the request body.
- Copy the generated cURL command or fetch snippet.
Example
Method POST, URL https://api.example.com/v1/users, header Content-Type: application/json, body {"name": "Jane Doe"} generates a ready-to-run cURL command with the header and body correctly quoted.
Limitations
This tool builds and displays the request - it does not send it. Everything happens in your browser; nothing you enter is transmitted to or stored on our servers.