Upload a file with one curl command

UploadPUT or POST to ul.sto.care

curl -T issues a PUT to https://ul.sto.care/<filename> with the filename taken from the local file. POST works too. The response is JSON with the download URL and an ISO 8601 expiry timestamp.

• Max 100 MB per file. Larger files belong in the web app (up to 5 GB).
• Content-Length is required. curl -T sets it for you; chunked transfer encoding is rejected with a 411.
• 10 uploads per IP per UTC day. Exceed it and you get a 429 until UTC midnight.
• Files expire after 72 hours. After that the link returns 404 or 410.

DownloadGET the link you got back

The original filename is preserved via the Content-Disposition header, so curl -LO saves the file under the name it was uploaded with. HEAD requests are supported if you only need to check that a file still exists.

$ curl -LO https://dl.sto.care/xk92mq7p
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 84.2M  100 84.2M    0     0  31.4M      0  0:00:02  0:00:02 --:--:-- 31.4M

$ ls
demo-reel.mp4

ErrorsEvery error is JSON

Errors come back as {"message": "..."} with a meaningful status code:

AutomationUsing from AI agents and scripts

A machine-readable reference lives at sto.care/llms.txt — point your AI agent at it and it has everything it needs to upload and share files on its own. A plain-text version of this page is also served from the API itself: curl https://ul.sto.care returns usage help.