Here's an example of a dynamically generated URL for the "service".
In https://tiddlywiki.com/, create a new tiddler (press that "+" button in the sidebar on the right.)
In the body of the "New Tiddler" (where it says "Type the text for this tiddler"), paste the following and then click on the save button (the checkmark at the top-right position of the tiddler):
The stuff in between the triple-curly-brackets is TiddlyWiki scripting.
It takes the URL, which already has the "?text=" part of the query string, and appends the title of the TiddlyWiki instance and the current time and date to the URL.
{$:/SiteTitle} gets the site title.
<now> gets the current date and time in the default format.
In https://tiddlywiki.com/, create a new tiddler (press that "+" button in the sidebar on the right.)
In the body of the "New Tiddler" (where it says "Type the text for this tiddler"), paste the following and then click on the save button (the checkmark at the top-right position of the tiddler):
Code: (Select All)
<iframe src={{{ [[https://basicanywheremachine.neocities.org/Test/Horizontal%20Marquis.prod.run.html?text=]addsuffix{$:/SiteTitle}addsuffix[ ]addsuffix<now>] }}} style="width:100%;height:250px">
</iframe>
The stuff in between the triple-curly-brackets is TiddlyWiki scripting.
It takes the URL, which already has the "?text=" part of the query string, and appends the title of the TiddlyWiki instance and the current time and date to the URL.
{$:/SiteTitle} gets the site title.
<now> gets the current date and time in the default format.