Signs-Server uses the signs library to create (point) military symbols. It supports MIL-STD-2525 and APP-6, editions C and D.
The common URL schema is
/signs/SIDC[+STANDARD][?param1=¶m2=...]
The SIDC must be 15 alpha-numeric characters for the legacy edition (Charly) or 20 numeric characters for the modern (Delta and beyond) editions. You may choose
between the standards APP6 and 2525 (the latter is the default if no standard is provided).
To create a symbol based on APP6 (D) you may call /signs/30031000161205011000+APP6. If you want to add text amplifiers you can add them as a query parameter like
/signs/30031000161205011000+APP6?t=Btn1&w=111555Bjul24