Request sender

Send an HTTP request from your browser

Choose a method, add headers, query parameters and a body, then see the status, headers, body and timing of the response.

Why some requests fail here

This tool runs inside your browser, so browser security rules apply. A page can only read a response from another site if that site allows it with CORS headers. Many APIs do not, and the browser then reports a generic network error.

Browsers also refuse to let pages set some headers, such as Host, Cookie and Content-Length.

What always works

Tapwire receiving URLs allow cross-origin requests, so you can send to your own endpoint from here and inspect it in the inspector. Requests to localhost also work if your local server sends CORS headers.

Testing from other systems

To test a real integration, configure the sending service with your Tapwire URL, or use a command-line client such as cURL, which has no CORS restrictions. Every captured request has a Copy as cURL button.