Docs / Modifying Traffic

Breakpoints

Pause a request or response in flight and change it.

Breakpoints (PRO) let you intercept matching traffic and edit it before it continues. A paused request opens the Debug window.

Add a breakpoint

Right-click a request → Breakpoint, or open Tools → Breakpoints (⌘⇧B) and click +.
Enter the URL, pick a method (optionally Include all subpaths), and choose to break on the Request, the Response, or both. A ws:// or wss:// URL pauses WebSocket frames instead.

When it pauses

Edit request/response headers, body, or status code.
Click Continue to send it on, or Abort to fail the request. The Body and Raw editors support ⌘Z undo and ⌘F find.
Closed the Debug window with requests still paused? Tools → Debug Window (⌘⇧D) brings them back.
Modifiers (add, remove, or replace a header; replace a body) can also apply edits automatically: turn on Auto-continue after applying modifiers to skip the pause.

Heads upBreakpoints require SSL decode for the host. A paused HTTP request or response waits until you click Continue or Abort; only a paused WebSocket frame resumes on its own after 60 seconds.