Stream a big list, up to 100,000

The endpoint behind our online proxy checker page. POST the list and read the answer as NDJSON: one JSON line per proxy, in the shape above, written the moment that proxy settles, so you can show results while the rest are still running. The same limits apply, counted per proxy.

Two kinds of event lines ride along; skip any line that has an _event key you do not know. {"_event":"progress","done":N,"total":M} arrives every 15 seconds, and {"_event":"end","total":M,"done":M,"duration_ms":N} closes a finished batch. A stream that stops without the end line was cut (a network drop, or a restart on our side): the lines you have no row for were not checked, so send just those again.

If your list is big enough that the run takes minutes, hand it over as a job instead: nothing stays connected, and an interrupted job resumes by itself.