A link
lolly.tools/t/qr-code?url=example.com&color=%23033633&format=png&export
Where Lolly runs
lolly.tools, your organisation's own site, or lolly:// for the installed app.
The tool
/t/ and the tool's id. A tool id is permanent, so the link keeps working.
Its inputs
One parameter for each input you set, called by the input's id. Inputs you leave out keep their defaults.
Reserved words
The format, the size and what happens on open. No tool may use these names for an input.
The same request on the command line
lolly qr-code--url=example.com --color=#033633--export=png
The command line has no host part: the tool runs on your machine, and writing the file is the export.