The first 3 characters of <data> are returned as the HTTP Status code. (Note that www. is required here unless you dont mind the response being redirected first) If you don't provide an integer, you will get status code 999

Pipes data to Power Automate's HTTP Request trigger, URL can be provided as the 'flowURL' key in the content, or a HTTP header (Base64 Encoded in either case.) If you POST content, that is used instead of the attributes in the URL.

With a GUID, POST will store data for retrieval, GET will return the contents of the last request with the given GUID. Data is stored unencrypted and available to anyone who guesses the GUID, and will be deleted periodically and entirely randomly.

Request an access GUID for PostBin, maybe behind a CAPTCHA to rate-limit, may limit arbitrarily. GUIDs may expire arbitrarily or not at all