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HTTP Request Builder

Network

Build and test HTTP requests with headers, body, and auth

Set a method, URL, headers, and body and send a real HTTP request straight from your browser, then inspect the actual response status, headers, and pretty-printed body rather than switching to a separate REST client. Because the request genuinely comes from your browser using `fetch()`, it's subject to the target server's CORS policy: an API that doesn't allow browser origins will block the request here even though the same call would succeed from a backend service or a terminal `curl`. Nothing about the request or response is proxied or logged by Utilix, so it's a reasonable way to test auth headers or a content-type requirement before writing integration code. Saved configurations make it easy to replay a request after tweaking a single header or query param.

httprequestfetchapitest

How to use HTTP Request Builder

  • 1.Set a method, URL, headers, and body to send a real HTTP request and inspect the response status, headers, and body in one place.
  • 2.Use it to quickly test whether an API endpoint requires a specific auth header or content-type before writing integration code.
  • 3.Save a request configuration to replay it after changing a single header or parameter, useful for debugging intermittent API errors.

Frequently asked questions

Does the request come from my browser or a server?
It's sent directly from your browser, which means requests are subject to the target server's CORS policy — if the API doesn't allow browser origins, the request will be blocked even though it would work fine from a backend or curl.
Is my request data (including auth tokens) sent to Utilix's servers?
No, the request goes directly from your browser to the target URL — Utilix doesn't proxy or log it.
Can I test HTTPS endpoints with self-signed certificates?
Only if your browser already trusts the certificate — this tool relies on your browser's own TLS handling, it doesn't bypass certificate validation.
Why do I get a CORS error even though the API works in Postman?
Postman and curl aren't subject to browser CORS restrictions since they're not running inside a webpage's origin, while this tool is — that's a fundamental limitation of any browser-based HTTP client, not a bug.

Use via API, SDK, or MCP

Installpip install utilix-sdk
Usageimport requests
res = requests.get(
    'https://httpbin.org/get',
    headers={'Authorization': 'Bearer token'}
)
print(res.json())

Runs locally · no API key · no rate limits · Python SDK docs →

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